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Fri, 28 Oct 2016
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Shallow 5.8 magnitude earthquake recorded off False Pass, Alaska

5.8 magnitude earthquake 173 km from Akutan, Alaska, United States

2016-10-27 11:53:18 UTC

UTC time: Thursday, October 27, 2016 11:53 AM
Your time: 2016-10-27T11:53:18Z
Magnitude Type: mwp
USGS page: M 5.8 - 136km S of False Pass, Alaska
USGS status: Reviewed by a seismologist
Reports from the public: 0 people

2016-10-27 11:53:18 UTC 5.8 magnitude, 17 km depth


Shallow 2.3 magnitude earthquake hits Cornwall, UK

Here's how the quake looked to scientists.
Cornwall has been struck by a 2.3 magnitude earthquake, with the centre of the quake at Liskeard.

There are no reports of any damage this morning.

Kirstin Lemon, of the British Geological Survey, said the quake of this size was unusual for Cornwall adding that scientists hoped to have more details soon.

Dozens of people are now comparing their experience of the earthquake on our Facebook pages. Nanny Kay wrote: "Heard the rumble in Newquay but didn't feel any movement although things in the kitchen started making noises just after."

Sarah Pascoe of Wadebridge said there was "a rumbling sound like thunder and the ground was shaking for around 30 seconds".

Lisa Grainger added: "Definitely heard the rumble then the house vibrate here in Polperro."

Arrow Up

Series of powerful earthquakes including 6.0 magnitude strikes central Italy

© Sandro Perozzi/AP
The Church of San Sebastiano stands amid rubble in Castelsantangelo sul Nera following an earthquake.
A 6.0 magnitude earthquake hit the Marche region in central Italy, just hours after a 5.4-magnitude tremor damaged buildings and cut power lines across the area. Buildings in the region have been damaged, but there have been no reports of fatalities.

A series of powerful aftershocks between magnitude 4 and 4.9 struck the area about five hours after the first tremor.

The strongest earthquake occurred 9.18 p.m. on Wednesday, 71 km (44 miles) east of Perugia. The United States Geological Survey reported it as a 6.0 magnitude temblor, while Italy's National Institute of Geophysics and Volcanology said it was a 5.9.

"It was a very strong, apocalyptic earthquake - people were screaming in the street, and now the lights are cut off," said Marco Rinaldi, the mayor of Ussita, a community of 400 that was also affected by the initial earthquake. "Many houses have collapsed. Our area is devastated."

Comment: Shallow 5.4 magnitude earthquake rattles central Italy; shakes buildings in Rome


Shallow 5.4 magnitude earthquake rattles central Italy; shakes buildings in Rome

Map of the earthquake's epicenter
An earthquake with a preliminary magnitude of 5.4 rattled a broad swath of central Italy, including Rome, on Wednesday (Thursday NZT), just two months after a powerful temblor toppled villages, killing nearly 300 people.

There were no immediate reports of damage.

Italy's National Vulcanology Center said the epicenter was near Macerata, near Perugia. The US Geological Survey said it had a depth of some 10 kilometres, which is relatively shallow.

The quake was felt across a broad swath of central and southern Italy, shaking centuries-old palazzi in Rome's historic centre.

The Aug. 24 quake destroyed hilltop village of Amatrice and other nearby towns.


USGS: 5.6 magnitude earthquake strikes off Tonga

© earthquake.usgs.gov
A 5.6 magnitude undersea earthquake struck 130 kms (80 miles) northwest of the South Pacific island nation of Tonga on Wednesday, the U.S. Geological Survey (USGS) said.

The quake was originally reported as 6.1 magnitude but was later downgraded by the USGS.

There were no immediate reports of damage or injuries and there was no tsunami warning issued after the quake, which struck at a shallow depth of 42 kms (26 miles). Its location was also recorded as 392 km (243 miles) west southwest of Samoa.


Shallow 5.8 magnitude earthquake hits near the Kuril Islands, Russia

An earthquake measuring 5.8 on the Richter scale occurred on Sunday near the Kuril Islands, the US Geological Survey reported.

The earthquake occurred at 20:25 GMT on Sunday at a depth of 29,7 kilometers (about 18 miles) with the epicenter located in 117 kilometers to the east of the Shikotan island.

There appeared to be no tsunami threat following the earthquake and there were no immediate reports of any damages or casualties. The Geological Survey appointed the green level of the earthquake consequences, indicating low probability of casualties and economic damage.

The so-called Kuril-Kamchatka Arc, which extends some 2,100 km from Hokkaido, Japan along the Kuril Islands and the Pacific coast of Russia's Kamchatka Peninsula, is one of the most seismically active regions in the world.

Arrow Down

Earthquake causes large sinkhole outside Ioannina, Greece

An investigator from the fire department takes photographs of a large sinkhole that swallowed up part of a dirt track and an olive grove in Kalpaki, a rural area outside Ioannina in northwestern Greece, on Saturday.

The sinkhole is estimated to have a depth of 20-30 meters at least, and an overall surface area of around 200 square meters, and is believed to have been caused by a series of earthquakes that struck the region a week ago.

On October 14, Ioannina was hit by a strong tremor measuring 5.4 on the Richter scale and followed by hundreds of aftershocks, some of them quite powerful.

Bizarro Earth

Magnitude 6.6 earthquake hits western Japan's Tottori

© AFP 2016
Richter magnitude scale
An earthquake with a preliminary magnitude of 6.6 shook western Japan on Thursday, the Japan Meteorological Agency said, adding that a tsunami warning was not issued.

Bizarro Earth

Methane gas seep discovered at the Cascadia Subduction Zone

© NOAA Okeanos Explorer
Methane gas bubbling up out of cold seeps on the Atlantic Ocean floor offshore Virginia.
From British Columbia to Northern California, planet Earth's got a case of the toots. A recent deep ocean mapping survey has learned that a geologically-active strip of seafloor called the Cascadia Subduction Zone is bubbling methane like mad. It could be one of the most active methane seeps on the planet.

"It's like bottles of champagne all along the seafloor," said Jesse Ausubel, an organiser for the 2016 National Ocean Exploration Forum, where the gaseous discovery, along with other intriguing finds from recent deep ocean surveys, is being presented this week.

For years, scientists have been aware that methane, an odourless, colourless gas produced naturally during microbial digestion (and more famously, by farting cows) bubbles up from the seafloor where the conditions are right. Recent scientific surveys have discovered hundreds of methane seeps along the Atlantic continental margin, and it's believed there could be thousands more across the world.

Understanding these seeps — where and when they occur, and what controls their activity — is a hot topic in Earth science research today, given that methane is a potent greenhouse gas. In fact, many scientists worry that by warming the oceans, climate change is speeding up the very processes that produce methane, in addition to melting icy methane hydrates that accumulate on the seafloor. In theory, this could lead to an enormous release of heat-trapping gases to the atmosphere.

Bizarro Earth

Study finds hidden connection between two dangerous fault zones in San Francisco

The longer a fault stretches, the bigger the earthquake it can produce.
The most dangerous earthquake fault in the San Francisco Bay Area is connected to another, which means both could rupture simultaneously and unleash major devastation, a new study finds.

The Hayward Fault has long been considered a threat because it runs under densely populated neighborhoods east of San Francisco. The new work found that beneath San Pablo Bay, it joins with a second, less active underground fracture to the north.

Scientists had already considered the possibility of both faults rupturing at once, whether they are connected or not. So the discovery doesn't change the estimated earthquake hazard much, although it confirms suspicions that the stage is set for what could be a massive quake.

If the Hayward and Rodgers Creek faults broke simultaneously along their combined 118 miles, they could produce a magnitude 7.4 quake, said scientists from the U.S. Geological Survey.