EERI Special Earthquake Report
Read the Report: The Mw 7.1 Darfield (Canterbury), New Zealand Earthquake of September 4, 2010 (1.8 MB PDF)
Preliminary Report on Seismological and Geotechnical Engineering Aspects of the April 4 2010 Mw 7.2 El Mayor-Cucapah (Mexico) Earthquake
Post-earthquake surveys of dams
Post-earthquake surveys of dams Date: 19/10/16 Building typology: Dams Municipality: Rieti and L’Aquila provinces Epicentral distance: from about 7 km to about 20 km Description […]
Preliminary Report on the Seismological and Geotechnical Aspects of the April 6 2009 L’Aquila Earthquake in Central Italy
Read the report: Preliminary Report on the Seismological and Geotechnical Aspects of the April 6 2009 L’Aquila Earthquake in Central Italy (25 MB PDF)
Lake Maninjau Landslides
The southern quarter of the lake experienced much greater ground motion than the rest of the lake , and this resulted in majorlandsliding on the southern rim of the crater. Approximately 25% of the southern rim experienced slides, burying parts of villages and displacing at least 2000 residents. Most of the slides were not extremely […]
Geotechnical Engineering Reconnaissance of the 2010 Haiti Earthquake
The earthquake epicenter was located immediately west of the city of Port-au-Prince, and the damage induced by this event was extreme. It is estimated that over 200,000 people were killed during the earthquake, and several hundred thousand injured. A strike-slip Mw = 7 event that affects ground near the margins of a bay represents a […]
Chile Earthquake Damage Reference Map
See the PDF map here: Chile earthquake damage (3.4 MB)
Soil Liquefaction Observations
About 5 hours after the earthquake I went down to the shore of the Villarrica Lake Temuco, and observed a very strange phenomena. Some googling showed that a possible explanation is soil liquefaction. This was later confirmed by Lisa Wald from USGS who recommended posting on this website. On some places at the beach, which is essentially […]
Preliminary Report on Geotechnical Effects of the 2010 Chile Earthquake
GEER Team Leaders: Jonathan Bray, UC Berkeley; Terry Elderidge, Golder Associates; David Frost, Georgia Tech; Youssef Hashash, University of Illinois; Robert Kayen, US Geological Survey; Christian Ledezma, Pontificia Univ. Catolica de Chile; Rob Moss, California Polytechnic Univ., San Luis Obispo; Ramon Verdugo, Universidad de Chile. Lead Authors: Pedro Arduino, Scott Ashford, Dominic Assimaki, Jonathan Bray, […]
First Impressions from New Zealand
The themes of the M7.1 Canterbury earthquake are URMs and liquefaction, with the following qualifications: Christchurch is only in a moderate zone and an M7 at 30 k was not expected. However, the ground motions, for whatever reasons, were in general less than the zoned spectra. While not zero, there was very little structural damage […]