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You are browsing the archive for earthquake Archives - AGU Blogosphere.

11 August 2017

Planet Labs imagery of landslides triggered by the Jiuzhaigou Earthquake

Planet Labs have very kindly made available before and after imagery of the landslides triggered by the Jiuzhaigou earthquake in China on 8th August 2017

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8 August 2017

Jiuzhaigou County: a shallow magnitude 7.0 earthquake in Sichuan Province on 8th August 2017

Early indications suggest that M=7.0 Jiuzhaigou County earthquake in Sichuan Province yesterday should have generated significant landslide activity

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26 June 2017

Xinmo landslide: an update

More information and imagery has emerged about the 8 million cubic metre Xinmo landslide in China, which killed over 100 people on Saturday

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23 June 2017

The Kaikoura earthquake landslides: an excellent video about the mitigation works on State Highway 1

The Kaikoura earthquake landslides: an excellent video about the enormous mitigation works on State Highway 1 in New Zealand

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19 May 2017

New technique provides earthquake risk for major cities worldwide

Scientists have developed snapshots of the likelihood of major earthquakes occurring in megacities around the world using a new statistical approach for estimating earthquake risk. The new technique, called seismic nowcasting, estimates the progress of a defined seismically-active geographic region through its repetitive cycle of major earthquakes.

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1 May 2017

Study of historic Chilean quake warns of a future tsunami

The most populated central region of Chile could be vulnerable to large tsunamis generated by a deceptively moderate kind of earthquake that might be overdue, say scientists who have sorted out the source of an earthquake and tsunami that struck the area 287 years ago. The region is the same that trembled from a magnitude 6.9 earthquake on April 24.

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25 April 2017

Strong earthquake widely filmed in Chile

A swarm of magnitude ~5-6 earthquakes offshore Chile on April 23 was punctuated two days later by a much larger M6.9 earthquake yesterday evening. While nobody could have specifically predicted the size and timing of this earthquake, it is a terribly unsurprising event, occurring as it did in the midst of this swarm of heightened seismic activity, and in the highly seismically hazardous region of coastal Chile. As has been pointed out …

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24 April 2017

The Wellington earthquake landslide problem

A few days ago a newspaper in New Zealand highlighted the potential Wellington earthquake landslide problem. Research is ongoing into this key issue

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11 April 2017

Who feels earthquakes?

Earthquakes are felt by people somewhere on the globe just about hourly (see this USGS list of felt earthquakes in just the last 24 hours). Some places are particularly prone to them–think Japan, Indonesia, Chile, Italy, California–while some stable parts of the continents will go generations, or even millennia, without anyone there feeling any quaking of the ground. But even in, say, California, where “felt” earthquakes occur daily, most individuals go months …

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2 March 2017

Historic earthquakes discovered along San Andreas Fault

A new U.S. Geological Survey study offers a view into the past behavior of large earthquakes along the southern San Andreas Fault. In the study, USGS geologist Kate Scharer and her team excavated trenches across the fault near Frazier Mountain in northeastern Ventura County. This section of the San Andreas previously had no long paleoearthquake record. The researchers found evidence of 10 ground-rupturing earthquakes on this section of the fault between 800 A.D. and the last rupture in 1857.

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27 February 2017

NIWA maps huge submarine landslides triggered by the Kaikoura earthquakes

In New Zealand, two research cruises by NIWA have mapped massive submarine landslides triggered by the Kaikoura earthquakes

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3 February 2017

Helicopter sluicing of the Kaikoura landslides

In New Zealand, the authorities are using helicopter sluicing to remove loose material from landslides and unstable slopes after the Kaikoura earthquake

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31 January 2017

Equipment Repairs in SW Bangladesh

After a night in Dhaka, our group temporarily split up. Chris and Dan headed to Khulna in the SW at 4 am to avoid the hartal (general strike) that was planned for 6am-2pm. Liz and I stayed in Dhaka for a day.

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27 January 2017

Sleuthing the site of a century-old earthquake

The second-largest earthquake on the planet in 1904 happened somewhere in Alaska. It could have been St. Michael, Rampart, Fairbanks, Coldfoot or a place called Sunrise on the Kenai Peninsula. People felt the magnitude 7.3 at each place.

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Cromwell Gorge: earthquake-induced groundwater changes in very deep-seated landslides

In new paper, O’Brien et al. (2016) report that regional earthquakes generate substantial changes in the groundwater level in landslides in Cromwell Gorge, New Zealand

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16 January 2017

Future shock – the failure to learn from the 2015 earthquake in Nepal

To mark National Earthquake Day, the Nepal Times has a series of articles entitled Future Shock that examines the failure to learn from the 2015 earthquake

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30 December 2016

Gas released from rocks can predict impending breakage

Small amounts of helium and argon gas released from rocks under stress could be used to predict rock breakage before it occurs, such as during an earthquake or in an underground mine, according to new research. This kind of early-warning signal could be useful for keeping people safe in situations where rock is under high stress, like mining or construction operations, according to the study’s authors.

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21 December 2016

New study differentiates between Utah’s natural and induced earthquakes

Mining activity caused nearly half of all earthquakes in Utah over the past three decades, according to a new study. By studying the epicenters of 6,846 earthquakes occurring in the state between 1982 and 2016, scientists at the University of Utah determined 3,957 of them occurred naturally and 2,889 were caused by coal mining.

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13 December 2016

Landslides caused by the 1929 M=7.8 Murchison earthquake in New Zealand

GNS Science have just released a report detailing an inventory of landslides triggered by the 1929 Murchison Earthquake in New Zealand

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2 December 2016

The North Canterbury Landslide Dams website

Canterbury Maps has created the North Canterbury Landslide Dams portal to provide information about valley blocking landslides after the Kaikoura Earthquake

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