Featured Research

from universities, journals, and other organizations

Did Slow Deformation Mitigate Peru Quake?

Date:
June 9, 2008
Source:
American Geophysical Union
Summary:
Between 1992 and 2007, nine magnitude 7 or larger earthquakes have rocked the subduction zone of southern Peru and northern Chile, including a magnitude 8.1 earthquake in August 2007 near Pisco, Peru. Researchers combined data from seismometers and interferometric synthetic aperture radar (InSAR) to determine the Pisco earthquake's heterogeneous slip distribution.

Between 1992 and 2007, nine magnitude 7 or larger earthquakes have rocked the subduction zone of southern Peru and northern Chile, including a magnitude 8.1 earthquake in August 2007 near Pisco, Peru.

Related Articles


Pritchard and Fielding combine data from seismometers and interferometric synthetic aperture radar (InSAR) to determine the Pisco earthquake's heterogeneous slip distribution.

The analysis includes some of the first data from the Japanese Advanced Land Observation Satellite (ALOS) and the European Envisat wide-swath beam. The seismic data indicate that the slip maximum occurred 60 seconds after the main shock started, and the InSAR data constrain the main slip patch to be about 70 kilometers (43 miles)from the earthquake's origin.

Combined, these factors suggest an extremely low rupture velocity or a long slip rise time. Historic data indicate that no large earthquake has occurred near Pisco since at least 1746.

Though the Pisco earthquake was large, its expected magnitude would have been larger if all stress accumulated since the eighteenth century had been released.

Thus, stress from subduction was likely released through aseismic deformation within this region.


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Journal Reference:

  1. Searching .. A study of the 2006 and 2007 earthquake sequence of Pisco, Peru, with InSAR and teleseismic data. Geophysical Research Letters, 2008; 35 (9): L09308 DOI: 10.1029/2008GL033374

Cite This Page:

American Geophysical Union. "Did Slow Deformation Mitigate Peru Quake?." ScienceDaily. ScienceDaily, 9 June 2008. <www.sciencedaily.com/releases/2008/06/080604140930.htm>.
American Geophysical Union. (2008, June 9). Did Slow Deformation Mitigate Peru Quake?. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2008/06/080604140930.htm
American Geophysical Union. "Did Slow Deformation Mitigate Peru Quake?." ScienceDaily. www.sciencedaily.com/releases/2008/06/080604140930.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Lava Inches Closer to Highway

Raw: Lava Inches Closer to Highway

AP (Dec. 21, 2014) Officials have opened a new road on Hawaii's Big Island for drivers to take care of their daily needs if encroaching lava from Kilauea Volcano crosses a highway and cuts them off from the rest of the island. (Dec. 20) Video provided by AP
Powered by NewsLook.com
Raw: Scuba Diving Santa Off Florida Keys

Raw: Scuba Diving Santa Off Florida Keys

AP (Dec. 20, 2014) A scuba diving Santa Claus explored the waters of the Florida Keys National Marine Sanctuary. Dive shop owner Spencer Slate makes the dive each year to help raise money for charity. (Dec. 20) Video provided by AP
Powered by NewsLook.com
Obama: Better Ways to Create Jobs Than Keystone Pipeline

Obama: Better Ways to Create Jobs Than Keystone Pipeline

AFP (Dec. 19, 2014) US President Barack Obama says that construction of the Keystone pipeline would have 'very little impact' on US gas prices and believes there are 'more direct ways' to create construction jobs. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com
Raw: Lava on Track to Hit Hawaii Market

Raw: Lava on Track to Hit Hawaii Market

AP (Dec. 19, 2014) Lava from an active volcano on Hawaii's Big Island slowed slightly but stayed on track to hit a shopping center in the small town of Pahoa. (Dec. 19) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins