Earthquakes

Magnitude 5+ Earthquakes – Global

6.3 Earthquake hits eastern Xizang-India Border.

The quake’s epicentre was in an uninhabited region and authorities have yet to receive any casualty reports.

5.5 Earthquake hits near the coast of Ecuador.

5.2 Earthquake hits near the coast of Ecuador.

5.1 Earthquake hits eastern Xizang-India Border.

5.1 Earthquake hits Merida, Venezuela.

5.0 Earthquake hits Tarapaca, Chile.

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Earthquakes

Magnitude 5+ Earthquakes – Global

6.2 Earthquake hits Fiji.

5.4 Earthquake hits the Banda Sea.

5.2 Earthquake hits the Kermedec Islands.

5.1 Earthquake hits off the coast of Aisen, Chile.

5.1 Earthquake hits the South Sandwich Islands.

5.0 Earthquake hits central Peru.

Earthquakes

Magnitude 5+ Earthquakes – Global

6.4 Earthquake hits southern Sumatra. Indonesia.

5.3 Earthquake hits southeast of the Ryukyu Islands off Japan.

5.2 Earthquake hits the Bali Sea.

5.1 Earthquake hits Ascension Island.

5.1 Earthquake hits New Britain, Papua New Guinea.

5.1 Earthquake hits offshore Tarapaca, Chile.

5.0 Earthquake hits eastern Xizang, China.

Two 5.0 Earthquakes hit New Ireland, Papua New Guinea.

5.0 Earthquake hits the Solomon Islands.

Earthquakes

Magnitude 5+ Earthquakes – Global

5.6 Earthquake hits near the coast of southern Peru.

5.5 Earthquake hits offshore Coquimbo, Chile.

5.3 Earthquake hits the South Sandwich Islands.

5.1 Earthquake hits Kepulauan Tanimbar, Indonesia.

5.0 Earthquake hits Kepulauan Tanimbar, Indonesia.

5.0 Earthquake hits Catamarca, Argentina.

5.0 Earthquake hits the Kermedec Islands.

Earthquakes

Magnitude 5+ Earthquakes – Global

5.3 Earthquake hits Atacama, Chile.

5.3 Earthquake hits Tonga.

5.3 Earthquake hits south of the Kermedec Islands.

5.2 Earthquake hits Manipur, India.

5.2 Earthquake hits Ascension Island.

5.0 Earthquake hits Tonga.

5.0 Earthquake hits the southern Mid-Atlantic ridge.

Earthquakes

Magnitude 5+ Earthquakes – Global

5.9 Earthquake hits southeast of the Ryukyu Islands off Japan.

5.8 Earthquake hits eastern Turkey.

5.5 Earthquake hits southwest of Sumatra, Indonesia.

5.3 Earthquake hits Antofagasta, Chile.

5.1 Earthquake hits Minahasa, Sulawesi, Indonesia.

5.0 Earthquake hits west of Macquarie island.

5.0 Earthquake hits Panay in the Philippines.

Earthquakes

Magnitude 5+ Earthquakes – Global

5.3 Earthquake hits Tarapaca, Chile.

5,000-Year-Long Earthquake-Tsunami Record

The discovery of sediment layers in a seaside cave represents the longest record of tsunamis in the Indian Ocean, and the clearest record of tsunamis anywhere in the world.

When the December 26, 2004 Indian Ocean earthquake occurred off the west coast of Sumatra, Indonesia, the 9.1 magnitude event — the third-largest tremor ever recorded on a seismograph — was so strong that it caused the entire planet to vibrate by as much as 0.4 inches. The quake triggered a series of devastating tsunamis that killed up to 280,000 people in fourteen countries, inundating some coastal communities with 100-foot-tall waves. The tsunamis are now regarded as being among the deadliest natural disasters in all of recorded history.

Motivated to better understand quake and tsunami dynamics, scientists Charles Rubin, Benjamin Horton, and their colleagues have been studying the seismic history of the region. Archaeologist Patrick Daly at the Earth Observatory of Singapore (EOS) suggested that they excavate a sea cave about 22 miles south of Banda Aceh, Sumatra.

Analysis of the find, published in the journal Nature Communications, provides a 5,000-year-long sedimentary snapshot of tsunamis in the region. The record shows that eleven tsunamis were generated between 7,900 and 2,900 years ago by earthquakes along the Sunda Megathrust, a 3,300-mile-long fault running from Myanmar to Sumatra along the floor of the Indian Ocean.

The investigation additionally determined that there were two tsunami-free millennia during the 5,000 years, and one century in which four tsunamis struck the coast. The scientists could see that smaller tsunamis tend to occur relatively close together, followed by long dormant periods. These, in turn, tend to be followed by very strong quakes and tsunamis, such as the one that struck in 2004.

According to the researchers, the 5,000-year record of tsunamis represents the first such discovery in a sea cave, the first record of tsunamis over this long of a period in the Indian Ocean, and the clearest record of tsunamis from anywhere in the world.

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The stratigraphy of the sea cave in Sumatra excavated by scientists from the Earth Observatory of Singapore, Rutgers, and other institutions shows lighter bands of sand deposited by tsunamis over a period of 5,000 years and darker bands of organic material, largely consisting of bat guano.

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Earthquakes

Magnitude 5+ Earthquakes – Global

5.9 Earthquake hits the Mauritius-Reunion region.

5.4 Earthquake hits near the east coast of Honshu, Japan.

5.3 Earthquake hits Tonga.

5.2 Earthquake hits Antofagasta, Chile.

5.1 Earthquake hits Barbados in the Windward Islands.