New Zealand’s Alpine Fault reveals extreme underground heat and fluid pressure

The drilling project at New Zealand’s Alpine Fault is the first to investigate a major fault that is due to rupture in a big earthquake in coming decades.
John Townend/Victoria University of Wellington, CC BY-SA

Rupert Sutherland, Victoria University of Wellington

An international team that drilled almost a kilometre deep into New Zealand’s Alpine Fault, which is expected to rupture in a major earthquake in the next decades, has found extremely hot temperatures and high fluid pressures.

Our findings, published today in Nature, describe these surprising underground conditions. They have broad implications for understanding what happens in the buildup to a major earthquake, and may represent the discovery of a new type of geothermal energy resource.

Seismic forces building up

The Alpine Fault is one of the world’s major plate boundaries and New Zealand’s most hazardous earthquake-generating fault. It runs for 650 kilometres along the spine of New Zealand’s South Island and we know that it ruptures on average every 300 years, producing an earthquake of about magnitude 8.

The last time the Alpine Fault did this was in 1717, when it shunted land horizontally by eight metres and uplifted the mountains a couple of metres. It is expected to rupture in a major earthquake in the next few decades and, even though this may not happen in the next 30 years or even 100 years, we know that the fault is at the end of its seismic cycle.

Other projects around the world have drilled into major faults, but usually just after a major earthquake. The Deep Fault Drilling Project, which involved more than 100 scientists from 12 countries, gave us an opportunity to take a close look at a fault as it builds up to its next rupture. It is the first time this has ever been done on a major fault that is due to fail in coming decades.

Drilling into New Zealand’s most hazardous fault.

Hot water at depth

We drilled two holes and during our second attempt made it to 893 metres deep. As we drilled deeper, the temperature increased rapidly, at a rate of about 15 degrees Celsius per 100 metres in depth. This is much higher than the normal rate of about 3°C per 100m in depth. At a depth of 630 metres, the water at the bottom of the drill hole was hot enough to boil, if it had been allowed to rise to the surface. The high pressures at depth stop it from boiling.

The hottest boreholes on Earth are mostly found in volcanic regions. We discovered a geothermal gradient – a measure of how fast temperature increases with depth – that is similar to the hottest geothermal energy boreholes drilled into volcanoes of the central North Island; but there are no volcanoes near the Alpine Fault.

How does it get so hot

There are two processes we think explain the extreme underground conditions at our drill site. An earthquake on the Alpine Fault has two geological effects: mountains are pushed higher and the shaking breaks up rocks.

During an earthquake and over time, the fractured rocks come down in landslides and rivers carry them to the sea. This limits how high the mountains can get. This process has operated for millions of years, with the height of the mountains staying about the same. Eventually, hot rocks from great depth (about 30 kilometres deep, at 550°C) were transported to the surface quickly enough (on geological time scales) that they did not have time to fully cool. Heat is transported from depth by the rock movement.

The other process that helps explain our findings is the rock fracturing, which allows rain water and snow melt to percolate downwards into the mountains so fast that it can move heat towards the valley, where water wells up and discharges. The flow needs to be fast enough so that the heat is not lost along the way, just as a water pipe in your home moves heat from a hot water cylinder to your bath before having time to cool. Water flowing through the rock concentrates heat and raises fluid pressure beneath the valleys.

The hot, high-pressure water beneath the valleys is mostly invisible at the surface, because it mixes with shallow, cold groundwater that flows to a depth of about 50 metres at our drill site. However, most of the valleys in the region where we drilled have a few warm springs that hint at this deeper source of hot water.

Better modelling of future hazards

The unexpected results of our research are important beyond New Zealand. Other faults around the world that we know are similar to the Alpine Fault may also have extreme conditions that have never been investigated.

Perhaps most significantly, we can now describe and estimate conditions on a geological fault that will rupture in an earthquake. This will help us to develop better computer models of earthquake rupture. It may also help us to explain how some types of geology (for example certain types of gold mineralisation) have formed as a result of similar conditions in ancient earthquakes.

Economic benefits

The extreme underground conditions we discovered may result in substantial economic benefits for New Zealand by providing a sustainable and clean geothermal energy resource that could be used by industry and local communities. We expect that similar hot geothermal conditions exist in other nearby valleys, and maybe in some other places in the world that are geologically similar to western New Zealand.

More drilling and measurements are needed to establish the scale of this local resource, its possible uses, and if it is safe to develop.

Rupert Sutherland, Professor of tectonics and geophysics, Victoria University of Wellington

This article was originally published on The Conversation. Read the original article.

Death Toll of Christians 48 in Jos, Nigeria Clash

Outbreak of violence in Plateau state results in burning of 10 church buildings.

LAGOS, Nigeria, January 27 (CDN) — Two pastors and 46 other Christians have been confirmed killed in the outbreak of violence 10 days ago in Jos, Plateau state in Nigeria, according to the Christian Association of Nigeria (CAN).

In the religious clash, triggered when Muslim youths on Jan. 17 attacked a Catholic church, 10 church buildings were burned and 27 Christians are still missing, CAN officials said at a press conference in Jos today. Police estimate over 300 lives were lost in the clash.

The Plateau state CAN chairman, the Most Rev. Ignatius Kaigama, said the CAN Directorate of Research has carefully investigated the clash “without any sentiment and come out with a factual account.”

Kaigama said flashpoint areas where clashes have repeatedly occurred should be identified and security personnel deployed.

Police said violence was triggered by an unprovoked attack by Muslim youths on worshippers at the St. Michael’s Catholic Church in Nasarawa Gwong, in the Jos North Local Government Area. Burned buildings included the Christ Apostolic Church, Assemblies of God Church, three branches of the Church of Christ in Nigeria and two buildings of the Evangelical Church of West Africa (ECWA), Christian leaders said.

The ECWA on Saturday (Jan. 23) reported that some of its members were missing and appealed to security agencies to help locate their whereabouts.

“Many of our members whose houses were burnt have to date not be found, despite all efforts by the church and their relatives to find their bodies or know their whereabouts,” said the Rev. Anthony Farinto, national president of the ECWA. “ECWA suspects strongly that many of the dead bodies hurriedly buried in mass graves by the Muslims included some of its members who were murdered within the Muslim neighborhoods.”

The Pentecostal Fellowship of Nigeria (PFN) accused the state General Officer Commanding (GOC), Major-Gen. Salleh Maina, and some soldiers of taking sides in the clash.

“Soldiers were seen in some parts of Jos watching Muslim youths shooting Christians and burning places without any efforts to stop them,” read a PFN a press statement.

The process of selecting GOCs nationwide should be open and brought under the supervision of the National Assembly, as the choice of GOC by one man does “not augur well for the peaceful co-existence of the nation,” according to the PFN.

The PFN urged the state government to form an Anti-Religious Riot Vigilante Group “whose officials should be well trained in surveillance, intelligence, security and brute self-defense as the first response group to any uprising before the arrival of the police to quell any uprising and save senseless killings.”

The Rev. Chuwang Avou, secretary of the state chapter of CAN, said the crisis broke out when Muslim youths pursued a woman into a church during worship on Sunday, wreaking havoc on the service. A Muslim group in the area, however, dismissed claims that Muslim youths ignited the tensions. They accused Christian youths of stopping a Muslim from rebuilding his house.

State Commissioner of Police Greg Anyating stated that Muslim youths were to blame for setting off the violence. 

The violence comes at a time of a leadership vacuum in Nigeria, with illness requiring Muslim President Umaru Yar’Adua to leave the country on Nov. 23 to seek treatment in Saudi Arabia.

The same area suffered on Nov. 28-29, 2008, when murderous rioting sparked by Muslim attacks on Christians and their property left six pastors dead, at least 500 other people killed and 40 churches destroyed, according to church leaders. More than 25,000 persons were displaced in the two days of violence.

What began as outrage over suspected vote fraud in local elections quickly hit the religious fault line as angry Muslims took aim at Christian sites rather than at political targets. Police and troops reportedly killed about 400 rampaging Muslims in an effort to quell the unrest, and Islamists shot, slashed or stabbed to death more than 100 Christians.

Sectarian violence in Jos, a volatile mid-point where the predominantly Muslim north meets the mainly Christian south, left more than 1,000 people dead in 2001. Another 700 people were killed in sectarian outbreaks of violence in 2004. Located in Nigeria’s central region between the Muslim-majority north and the largely Christian south, Plateau state is home to various Christian ethnic groups co-existing uneasily with Muslim Hausa settlers.

Report from Compass Direct News 

Christians in Jos, Nigeria Fear Further Attacks

Churches burned following assault on Catholic church in volatile Plateau state.

LAGOS, Nigeria, January 19 (CDN) — Gunshots and smoke continued to alarm residents of Jos in central Nigeria today, with the Christian community fearing further violence from Muslim youths who on Sunday (Jan. 17) attacked a Catholic church and burned down several other church buildings.

A 24-hour curfew imposed yesterday in Jos and the suburb of Bukuru by the Plateau state government was extended through Wednesday. Police said continuing violence was initially triggered by Sunday’s unprovoked attack by Muslim youths on worshippers at the St. Michael’s Catholic Church in Nasarawa Gwong, in the Jos North Local Government Area.

Also burned were buildings of the Christ Apostolic Church, Assemblies of God Church, three branches of the Church of Christ in Nigeria and two buildings of the Evangelical Church of West Africa, Christian leaders said.

The number of casualties continued to grow, reportedly reaching more than 100 as security forces tried to rein in rioters, with both Christian and Muslim groups still counting their losses. Hundreds have reportedly been wounded.

“We have been witnessing sporadic shootings in the last two days,” said the Rev. Chuwang Avou, secretary of the state chapter of the Christian Association of Nigeria. “We see some residents shooting sporadically into the air. We have also seen individuals with machine guns on parade in the state.”

Avou said many of those who are shooting are civilians, not policemen, and that they have been mounting road blocks and causing chaos in the area. At least 35 people have been arrested.

“What we have witnessed only goes to show that the problem in the state is far from over,” he said. “Many families have been displaced. There are a number who are receiving treatment in the hospital. The dusk-to-dawn curfew imposed in the state has not solved any problem, as there is still tension in the land.”

Avou said the crisis broke out when Muslim youths pursued a woman into a church during worship on Sunday, wreaking havoc on the service.

“Some Muslim youths invaded some churches and started burning and destroying properties,” he said. “We were told that the youths pursued a lady to the church. Nobody knew what the lady did. What we just discovered was that the entire atmosphere was ignited and houses were being burned.”

A Muslim group in the area, however, dismissed claims that Muslim youths ignited the tensions. They accused Christian youths of stopping a Muslim from rebuilding his house.

State Commissioner of Police Greg Anyating stated that Muslim youths were to blame for setting off the violence.

As violence continued today, there was a mass movement of Christians and Muslims from areas where rampaging youths were unleashing mayhem on the city despite heavy security. The Nigerian army was reportedly summoned to try to restore order.

The Rev. Ignatius Kaigama, co-chairman of the state Inter-Religious Council and Catholic Archbishop of Jos, condemned the recurring civil disturbances in the state and called on all to “sheath their swords and be their brothers’ keepers.”

The secretary of the Pentecostal Fellowship of Nigeria, Pastor Wale Adefarasin, said attacks on Christians are a manifestation of terrorism in the country.

“What we should realize is that the government is not helping situations,” he said. “It is an illusion that Nigeria is safe.”

He added that terrorism affects both Christians and Muslims negatively, and that it is the duty of elected officials to ensure that terrorists are detected early and deterred.

“The Muslim fundamentalists want to take over Jos by all means,” Pastor Adefarasin said. “They claim that Jos is a Muslim state, which is not true.”

Violence hit the same area on Nov. 28-29, 2008, when murderous rioting sparked by Muslim attacks on Christians and their property left six pastors dead, at least 500 other people killed and 40 churches destroyed, according to church leaders. More than 25,000 persons were displaced in the two days of violence.

What began as outrage over suspected vote fraud in local elections quickly hit the religious fault line as angry Muslims took aim at Christian sites rather than at political targets. Police and troops reportedly killed about 400 rampaging Muslims in an effort to quell the unrest, and Islamists shot, slashed or stabbed to death more than 100 Christians.

The violence comes at a time of a leadership vacuum in Nigeria, with illness requiring Muslim President Umaru Yar’Adua to leave the country on Nov. 23 to seek treatment in Saudi Arabia.

Sectarian violence in Jos, a volatile mid-point where the predominantly Muslim north meets the mainly Christian south, left more than 1,000 people dead in 2001. Another 700 people were killed in sectarian outbreaks of violence in 2004. Located in Nigeria’s central region between the Muslim-majority north and the largely Christian south, Plateau state is home to various Christian ethnic groups co-existing uneasily with Muslim Hausa settlers. 

Report from Compass Direct News 

RUSSIAN CHURCH WARNS EUROPEANS OF EFFECTS OF CHRISTIAN PHOBIA

The Russian Orthodox Church believes that the European community should take urgent measures to combat Christian phobia in today’s Europe, reports Interfax-Religion.

“We should become aware that Christian phobia was generated by Christian civilization, or whatever we call European civilization now. Christian phobia is nothing else but malignant cancer which threatens European civilization with fatal effects,” Russian Church representative at the European Council Hegumen Filaret (Bulekov) said at the Dialogue of Civilizations World Public Forum in Prague.

He urged “not only Christians, but also all bearers of traditional European culture formed by Christianity to consider carefully their cultural survival in today’s globalizing world and ask themselves why so many of them feel no concern about the present and the future of their culture and their religious traditions.”

“We need to acknowledge that it is impossible to put the blame for Christian phobia displays on Muslims, immigrants or the so-called “Civilization Clash”. It is the essential and primary fault of successors to European Christian culture, that is, our fault,” Fr. Filaret said.

Report from the Christian Telegraph

COLOMBIA: LEFTIST GUERRILLAS THREATEN, KILL CHRISTIANS

Pastors are issued warnings in north; evangelists murdered in southwest.

LOS ANGELES, March 18 (Compass Direct News) – Having been sentenced to die by leftist rebels for holding Christian worship services in 2006, a pastor in Colombia’s northern department of Arauca took seriously the death threats that guerrillas issued on Friday (March 13), according to Christian support organization Open Doors.

The rebels from the National Liberation Army (ELN) phoned a pastor of Ebenezer Church in Saravena at 5:30 a.m., telling him to meet them at a site on the Arauca River at 7 a.m. When the pastor, who requested anonymity, arrived at the landing, the guerrillas took him by canoe to the other side of the river – into Venezuela – then drove him to a guerrilla camp some 40 minutes away.

For the next three hours, the rebels warned him that area pastors have three options: cooperate with the revolutionary cause of the guerrillas, leave or die.

They warned him that pastors must not preach to ELN guerrillas – the Christian message of peace contradicts their military objectives – and could not support Christian political candidates without their permission.

“We do not want pastors and those attending their churches to participate in politics,” they told the pastor. “We do not want evangelicals in politics, because you do not support our ideals. We have nothing in common with evangelicals.”

The guerrillas said the ELN does not object to pastors preaching within church walls, but that the congregation must not talk of politics, war or peace. Before letting him go, they told him that the ELN will show no compassion on church members if they continue to disobey those directives.

Such threats were not new to the pastor. In 2006, Open Doors sources said, he and his family had to leave behind the church he pastored in Fortul village and much of their belongings after guerrillas threatened to kill him for preaching and leading Christian services in both a home and a worship building.

ELN forces took control of the area in 2007 and quickly declared Christian worship illegal; by January 2008, the guerrillas had closed seven churches and prohibited preaching of Christ in rural areas.

According to the U.S. Department of State’s International Religious Freedom Report 2008, the Human Rights Unit of Colombia’s Prosecutor General’s Office is investigating killings in past years of 14 clergy members believed to have been targeted because they were outspoken critics of terrorist organizations. The Presidential Program for Human Rights reported that nearly all killings of priests by terrorist groups could be attributed to leftist guerrillas, particularly the FARC.

“Catholic and Protestant church leaders noted that killings of religious leaders in rural communities were generally underreported because of the communities’ isolation and fear of retribution,” the state department report notes. “Religious leaders generally chose not to seek government protection because of their pacifist beliefs and fear of retribution from terrorist groups.”

A human rights organization affiliated with the Mennonite church, Justicia, Paz y Acción No-violenta (Justapaz), asserted that guerrillas, former paramilitaries, and new criminal groups equally committed violence against evangelical church leaders, according to the state department report.

Leftist rebels opposed to Christian peace teachings continue to issue threats of violence against pastors and Christian leaders in various parts of Arauca department. On Feb. 28, ELN guerrillas took the pastor of another church to a guerrilla camp in Venezuela. Upset that pastors were taking advantage of the presence of the Colombian army to defy the guerrillas – publicly preaching Christ and using their pulpits for preaching peace – the rebels accused Christians of not helping with social projects.

“Preach inside churches, but do not let them die – worry how to save those that are with you,” one guerrilla told the pastor, who requested anonymity. “We will have to take drastic measures with pastors so they obey again.”

The pastor first had contact with rebels 12 years ago, when Marxist members of the Revolutionary Armed Forces of Colombia (FARC) held him for several days.

In Puerto Jordán, a municipality of Arauquita, last Dec. 9 presumed leftist rebels gave 40-year-old pastor Rodolfo Almeida eight days to leave. Open Doors reported that a young man came to his house at 8:30 at night and asked for his wife. Surprised that stranger would ask for her at that hour, Almeida asked why he wanted to see her. The young man then told him that he had eight days to leave town or his life would be threatened.

The stranger refused to tell Almeida what organization he was with. He only reminded him that he had been warned. The pastor had received similar threats from ELN rebels in 2007, and by the end of 2008 he and his wife decided to leave with their three children. Almeida had served for more than two years as co-pastor of Ebenezer Church in Arauquita.

Two unnamed Christian mayors in Arauca have also come under threat from the guerrillas, and on Feb. 15 a councilman was killed. Since they took office in January 2008, the mayors of Arauquita and Saravena have been attacked by ELN rebels several times, according to Open Doors. They have drawn the ire of the guerrillas because they cannot be bought as their predecessors were, and they refuse to engage in the rebels’ illegal activities.

“In our lives we have lost the privileges of an ordinary person,” the mayor of Arauquita told Open Doors. “Now we are military targets. God brought me here, but sometimes I have wished not to continue, because being a Christian in a context like this where we live has a very high price.”

Last year, he added, guerrillas killed seven Christians in Arauca department. “Some of them were public officials, others were leaders or simply people recognized by their testimony as believers in Christ,” he said.

Open Doors reported that Councilman Francisco Delgadillo, a Christian who had received threats from the ELN guerrillas, was killed as he returned to his home on Feb. 15.

 

FARC Territory

Across the river, Venezuela serves as a safe haven for the ELN, which the U.S. Department of State has designated as a terrorist group. With the approval of Venezuelan President Hugo Chávez, the guerrilla forces use the country as a base from which to move into Colombia’s oil-rich Arauca department.

Although the ELN has been at odds with the Marxist FARC, in Arauca the two rebel groups co-exist without conflict; from their bases in Venezuela, according to Open Doors, the two groups amicably share paths and roads.

FARC guerrillas control the southwestern department of Huila, where last November four Christians were killed. Open Doors reported that all four belonged to the Alianza Cristiana church of Santana Ramos. Farley Cortés was killed on Nov. 5 in Plumeros village, Hermes Coronado Granado was killed on Nov. 8 in Santana Ramos, and 10 days later a married couple, Dora Lilia Saavedra and Ferney Ledezma, were also killed there.

Guerrillas seized Saavedra, 40, and the 35-year-old Ledezma from the school where Saavedra taught on Nov. 18, bound them on the floor of an old house and shot them several times. The FARC guerrillas had taken their three children, ages 3, 5 and 12, along with them and made them wait at a nearby house within hearing of the shots. The couple, married for five years, were known for proclaiming Christ in the village that borders the farm they owned.

Their pastor, Hernan Camacho, has moved with his family out of the area after receiving death threats.

The FARC accuses the families of Camacho, his brothers and Saavedra of refusing to follow its ideology, Pastor Camacho told Open Doors. “[The guerrillas] say that we, the evangelical ones, are their worst enemy because we teach the people not to take up weapons,” he said. “They accuse us of lulling the minds not to claim our rights against the government … the guerrillas say that it is our fault that the people prefer to continue with the church and not to join them.”

Motives for the killings are still under investigation, but Open Doors reported that Huila is in a zone historically known for systematic persecution of the church by guerrillas. In July 2007, pastor Jael Cruz García, 27, and another pastor, 63-year-old Humberto Méndez Montoya, were murdered in the village of La Legiosa in northern Huila. In 2002, two other pastors, Abelardo Londoño and Yesid Ruíz, were shot and killed in the same area.

Having lost three key leaders last year and been pushed out of most major urban centers by government forces, the FARC has embarked on a terror campaign to make its presence known in cities, according to The Christian Science Monitor. In the Huila capital of Neiva, on March 6 a bomb explosion damaged a hardware store and nearby businesses, according to the newspaper, and on Jan. 16 suspected FARC rebels were responsible for a car explosion at a shopping mall.

Report from Compass Direct News

ARSON SUSPECTED IN BLAZE AT GOV. SARAH PALIN’S CHURCH

A blaze swallowed Gov. Sarah Palin’s evangelical Christian church on Friday and caused severe damage that fire officials say was likely the work of arsonists, reports Kathleen Gilbert, LifeSiteNews.com.

The damage to the 2 1/2-year-old Wasilla Bible Church building is estimated at $1 million. Five women, and possibly a couple of children, were inside the church when the flames erupted, but escaped with no injuries.

Palin’s spokesman, Bill McAllister, said that Palin stopped by the church the following day to apologize in case the fire was connected to the “undeserved negative attention” the church has received since her unsuccessful run for the vice presidency. Palin was not present when the fire started, and did not attend Sunday services temporarily held at a local middle school, as she was on state business in Juneau.

Fire Chief James Steele told the Associated Press that the blaze is being investigated as a case of arson. He said investigators had no leads to discern whether the arsonist had a political motivation.

“Whatever the motives of the arsonist, the governor has faith in the scriptural passage that what was intended for evil will in some way be used for good,” McAllister said.

John Doak, associate pastor at Wasilla Bible Church, expressed the communion of faith that united churchgoers after the devastating blaze. “The definition of the church is the body of Christ, made up of God’s people,” said Doak after the Sunday service at Wasilla Middle School, attended by about 1,200 people. “The church is still there. We are the church.”

During Sarah Palin’s VP run on the Republican presidential ticket with John McCain, her home church came under harsh scrutiny from media analysts who found fault with the church’s teachings. In particular, homosexualists were outraged when it was discovered that the church advertised a Focus on the Family conference inviting homosexuals to overcome their same-sex attraction.

The Bible Church also made headlines for having hosted Jews for Jesus leader David Brickner. Political commentators warned Palin that the church’s decision to host Brickner would alienate her from the Jewish community, as Brickner’s organization has been criticized for “targeting Jews for conversion with subterfuge and deception.”

Report from the Christian Telegraph