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Strong 8.9 Magnitude Earthquake hits Sumatra, Indonesia – Tsunami Warning Issued

Magnitude 6.4 Quake Off Indonesia’s Sumatra

April 15, 2012: A 6.4-magnitude earthquake struck off the coast of Indonesia’s Sumatra island on Sunday but there were no reports of damage, the geophysics agency said.

“The epicenter is in the sea and there is no tsunami warning because at less than 7.0 magnitude it is still considered moderate,” said Arif Nurahim, an official at Indonesia’s Meteorology and Geophysics Agency.

The quake hit 640 kilometers (400 miles) southwest of Aceh province, which was shaken Wednesday by two massive earthquakes that triggered a tsunami alert.

At a magnitude of 8.6, the first of the two quakes was the strongest to hit since the 2004 Indian Ocean tsunami that killed 170,000 in Aceh but no major damage was reported.

Sunday’s aftershock was not felt in Aceh, unlike the quakes last week which sent panicky residents pouring out of their homes.

April 11: Strong 8.9 Magnitude Earthquake hits Sumatra, Indonesia – Tsunami Warning Issued

8.9 Magnitude Earthquake hits Sumatra, Indonesia - Tsunami Warning Issued

Latest Update on Indonesia Earthquake:

A powerful 8.6 magnitude earthquake and strong aftershocks struck off Indonesia on Wednesday, sending people as far away as southern India scurrying from buildings and raising fears of a disastrous tsunami as in 2004.

Indonesian President Susilo Bambang Yudhoyono said there were no immediate reports of casualties or damage in Aceh, the Indonesian province closest to the initial earthquake. But an aftershock of almost the same magnitude, less deep that the first quake, hit soon after he finished speaking.

The first quake struck at 0838 GMT and an 8.2 magnitude aftershock just over two hours later, at 1043 GMT. Two more strong aftershocks hit later.

The Pacific Tsunami Warning Center issued fresh tsunami warnings for the entire Indian Ocean after the aftershocks. Authorities in Indonesia said there were reports of sea-levels rising off Aceh, but by less than a metre (3.3 feet).

But authorities in India’s Andaman and Nicobar islands, to the north of where the quakes struck, said waves of up to 3.9 metres (13 feet) could hit there.

Individual countries, including Thailand, Indonesia, Sri Lanka, Bangladesh and India, issued their own tsunami warnings and people near the coast in six Thai provinces were ordered to move to higher ground. Authorities shut down the international airport in the Thai beach resort province of Phuket.

The quakes were about 300 miles (500 km) southwest of the city of Banda Aceh, on the northern tip of Indonesia’s Sumatra island, the U.S. Geological survey said. The first was at a depth of 20.5 miles (33 km).

Indonesia’s disaster management agency said power was down in Aceh province and people were gathering on high ground as sirens warned of the danger.

“The electricity is down, there are traffic jams to access higher ground. Sirens and Koran recitals from mosques are everywhere,” said Sutopo, spokesman for the agency.

Yudhoyono, speaking after the first quake, said there were no signs of a disaster.

“There is no tsunami threat although we are on alert,” said he said at a joint news conference in Jakarta with visiting British Prime Minister David Cameron, who said Britain was standing ready to help if needed.

“The situation in Aceh is under control, there’s a little bit of panic but people can go to higher ground,” Yudhoyono said.

Warning sirens rang out across the Thai island of Phuket, a tourist hotspot that was one of the worst hit areas in the 2004 tsunami.

“Guests from expensive hotels overlooking Phuket’s beaches were evacuated to the hills behind and local people were driving away in cars and on motorcycles. Everyone seemed quite calm, the warning had been issued well in advance,” freelance journalist Apichai Thonoy told Reuters by telephone.

OUT ON THE STREETS

Indonesian television showed people gathering in mosques in Banda Aceh. Many others were on the streets, holding crying children.

In the city of Medan, a hospital evacuated patients, who were wheeled out on beds and in wheelchairs.

Yudhoyono said he had ordered a disaster relief team to fly to Aceh, which was devastated by the 9.1 magnitude 2004 quake, which sent huge tsunami waves crashing into Sumatra, where 170,000 people were killed, and across the Indian Ocean.

In all, the 2004 tsunami killed about 230,000 people in 13 Indian Ocean countries, including Thailand, Sri Lanka and India.

Wednesday’s quakes were felt as far away as the Thai capital, Bangkok, and in southern India, hundreds of office workers in the city of Bangalore left their buildings while the port of Chennai closed down because of tsunami fears.

The quakes were in roughly in the same area as the 2004 quake, which was at a depth of 18 miles (30 km) along a fault line running under the Indian Ocean, off western Indonesia and up into the Bay of Bengal.

One expert told the BBC at least Wednesday’s first quake was a “strike-slip” fault, meaning a more horizontal shift of the ground under the sea as opposed to a sudden vertical shift, and less risk of a large displacement of water triggering a tsunami.

The quakes were also felt in Sri Lanka, where office workers in the capital, Colombo, fled their offices.

Mahinda Amaraweera, Sri Lanka’s minister for disaster management, called for calm while advising people near the coast to seek safety.

“I urge the people not to panic. We have time if there is a tsunami going to come. So please evacuate if you are in the coastal area and move to safer places,” Amaraweera told a private television channel.

In Bangladesh, where two tremors were felt, authorities said there appeared to be no threat of a tsunami. Australia also said there was no threat of a tsunami there.

Update: 8.2 magnitude aftershock hits Aceh, Indonesia within an hour of 8.7 magnitude earthquake.

An aftershock measuring 8.2 on the Richter scale hit Aceh around 5:00 Wednesday afternoon, according to Indonesia’s Meteorology and Geophysics Agency (BMKG).

Update: Indonesian President Susilo Bambang Yudhoyono says ‘No Tsunami Threat’ For Indonesia

Indonesian President Susilo Bambang Yudhoyono said that there was “no tsunami threat, although we are on alert,” in a televised speech from the Presidential Palace in Jakarta on Wednesday afternoon, according to Reuters.

Residents flee after 8.7 Earthquake in Indonesia

Residents flee after 8.7 Earthquake in Indonesia

Update: 6.5 magnitude aftershock hits Aceh, Indonesia within an hour of 8.7 magnitude earthquake.

An aftershock measuring 6.5 on the Richter scale hit Aceh around 4:30 Wednesday afternoon, according to Indonesia’s Meteorology and Geophysics Agency (BMKG).

A tsunami warning is still in effect for Sumatra and more than 25 countries, including: Indonesia, Malaysia, Singapore, Bangladesh, India and Thailand.

The epicenter of the aftershock was 42 kilometers off the Indian Ocean.

 

Indonesia Earthquake 8.7 Magnitude - Graphical Analysis

Indonesia Earthquake 8.7 Magnitude - Graphical Analysis

Indonesia issued a tsunami warning Wednesday afternoon after an earlier earthquake with a preliminary magnitude of 8.5 hit waters off westernmost Aceh province.

People on Twitter said tremors were felt in Singapore, Thailand, Malaysia and India. High-rise apartments and offices on Malaysia’s west coast shook for at least a minute.

The U.S. Geological Survey said the powerful quake was centered 20 miles (33 kilometers) beneath the ocean floor around 308 miles (495 kilometers) from Aceh’s provincial capital.

Said, an official at Indonesia’s BMKG who goes by only one name, said a tsunami warning has been issued for Aceh, West Sumatra, North Sumatra, Lampung and Bengkulu.

The National Oceanic and Atmospheric Administration issued a tsunami warning for the following 27 countries: Indonesia, India, Sri Lanka, Australia, Burma, Thailand, Maldives, United Kingdom, Malaysia, Reunion, Seychelles, Pakistan, Somalia, Oman, Madagascar, Iran, United Arab Emirates, Yemen, Comores, Bangladesh, Tanzania, Mozambique, Kenya, Crozet Islands, Kerguelen Islands, South Africa and Singapore.

Indonesia straddles a series of fault lines that makes the vast island nation prone to volcanic and seismic activity.

A giant 9.1-magnitude quake off the country on Dec. 26, 2004, triggered a tsunami in the Indian Ocean that killed 230,000 people, nearly three quarter of them in Aceh.

Earlier Update of 8.7 Earthquake in Indonesia

It was initially reported as 8.9 magnitude but was later revised down to 8.7 by the USGS.

The tsunami warning said quakes of such a magnitude “have the potential to generate a widespread destructive tsunami that can affect coastlines across the entire Indian Ocean basin”.

The tremor was felt as far away as Singapore, Thailand, Bangladesh and India.

The Thai office of disaster management said people along the west coast of Andaman province should heed warnings and evacuate.

Reuters reports that people in the region were making their way to higher ground, but quoted Indonesian officials as saying there had been no immediate reports of damage of rising water levels in Aceh.

The BBC’s Karishma Vaswani in the Indonesian capital Jakarta says there were reports of the ground shaking for up to five minutes. Contact with people in the immediate area around the quake has not been possible so far, says our correspondent.

Indonesia straddles the Pacific Ring of Fire, a zone of major seismic activity.

Earlier Update (Reuters) – Indonesia issued a tsunami warning after a huge 8.9 magnitude earthquake off its westernmost province Aceh, leading panicked locals to scramble out of their houses to seek refuge.

An tsunami watch was issued for countries across the Indian Ocean on Wednesday after a large earthquake hit waters off Indonesia, sending residents pouring from their homes in panic.

The U.S. Geological Survey said the 8.7-magnitude quake was centered 20 miles (33 kilometers) beneath the ocean floor around 269 miles (434 kilometers) from Aceh’s provincial capital.

People on Twitter said tremors were felt in Singapore, Thailand, Malaysia, Bangladesh and India. High-rise apartments and offices on Malaysia’s west coast shook for at least a minute.

The Pacific Tsunami Warning Center in Hawaii said a tsunami watch was in effect for Indonesia, India, Sri Lanka, Australia, Myanmar, Thailand, the Maldives and other Indian Ocean islands, Malaysia, Pakistan, Somalia, Oman, Iran, Bangladesh, Kenya, South Africa and Singapore.

 

Indonesia Earthquake Tsunami Warning Issued Following Magnitude 8.7 Temblor

A tsunami watch means there is the potential for a tsunami, not that one is imminent.

The province was devastated by a 2004 tsunami that left 170,000 dead or missing, and that in total killed about 230,000 people in 13 Indian Ocean nations.

An Indonesian official says an earthquake with a preliminary magnitude of 8.9 has hit off Aceh, on the northern tip of Sumatra.

A tsunami warning has been issued by Indonesian and US monitors.

Indonesia has issued a tsunami warning after a quake with a preliminary magnitude of 8.9 hit waters off westernmost Aceh province.

The U.S. Geological Survey said Wednesday the quake was centered 20 miles (33 kilometers) beneath the ocean floor around 308 miles (495 kilometers) from the provincial capital of Banda Aceh.

Said, an official at Indonesia’s Meteorology and Geophysics Agency who goes by only one name, said a tsunami warning has been issued.

Indonesia straddles a series of fault lines that makes the vast island nation prone to volcanic and seismic activity.

A giant 9.1-magnitude quake off the country on Dec. 26, 2004, triggered a tsunami in the Indian Ocean that killed 230,000 people, nearly three quarter of them in Aceh.

8.9 magnitude earthquake hits sumatra-indonesia-tsunami warning issued

 

Magnitude 8.7 Mw
Date-Time
  • 11 Apr 2012 08:38:38 UTC
  • 11 Apr 2012 14:38:38 near epicenter
  • 11 Apr 2012 14:38:38 standard time in your timezone
Location 2.348N 93.072E
Depth 33 km
Distances
  • 431 km (268 miles) SW (216 degrees) of Banda Aceh, Sumatra, Indonesia
  • 962 km (598 miles) W (265 degrees) of KUALA LUMPUR, Malaysia
Location Uncertainty Horizontal: 14.0 km; Vertical 2.8 km
Parameters Nph = 243; Dmin = 514.3 km; Rmss = 1.67 seconds; Gp = 36°
M-type = Mw; Version = 8

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One comment

  1. 1

    The breaking news that two big earthquake of 8.7 magnitude struck off the coast of Indonesia, caused huge destruction in major cities, now said to have come across the Indian Ocean rarely Andaman and Nicobar Islands and the eastern coast.

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