Damage Scenarios – Mainshock, 20th May
Contents of this preliminary scenario are related to WebGIS systems to evaluate the seismic risk of residential buildings, schools and road system. To determine shakemaps, Akkar-Bommer (2010) attenuation relationship, recently available in literature, has been adopted, since it is recognized to suitably reproduce acceleration spectra obtained by italian ground motion records. More detailed information can be […]
Damage Scenarios – Aftershocks, 29th May
The dicentra location has been recorded at 44.851, 11.086, near to Medolla, at 10.2 Km depth. An update of the damage scenarios for the residential buildings has been carried out. More detailed information can be found here: Real time damage scenario.
Shake maps of the 29th May aftershock
The map below (Figure 1) shows the interpolation of peak ground acceleration – horizontal components (PGA_h) – recorded by the stations of RAN network during the May 29th event of Ml 5.8 (last accessed 30/05/2012). Figure 1. The map below (Figure 2) shows the interpolation of peak ground acceleration – vertical components (PGA_v) – recorded by the stations of the RAN […]
Data Analysis of RAN network records – May 20th event
For each of the three components – South-North (SN, blue), Est-West (EW, black) and vertical (UP, red) – data analysis present time histories (left) and relative acceleration response spectrum (Sa), velocity response spectrum (Sv) and displacement response spectrum (Sd). For each considered station, a comparison between acceleration, velocity and displacement response spectra is presented, according […]
GEER Preliminary Kaikoura Earthquake Landslide Inventory
View the Inventory: Preliminary Kaikoura Earthquake Landslide Inventory (KMZ)
Ecuador Earthquake Aerial Photos
Ecuador Earthquake Aerial Photos
GEER Report Version 2
The Culprit in Mexico City-Amplification of Motion
Abstract Mexico City has repeatedly suffered from the the long-distance effects of the earthquakes that originate as far away as the subduction trenches near the Mexican Pacific Coast. The Michoacan, Mexico earthquake of 19 September 1985 was no exception and caused extensive damage to property and numerous loss of lives. The unique subsurface condition resulting […]
Engineering Aspects of the September 19, 1985 Mexico Earthquake
Abstract Following the September 19, 1985 Mexico earthquake, a team consisting of four engineers and one seismologist from the Naitonal Bureau of Standards (NBS)and the United States Geological Survey (USGS) was dispateched to Mexico City to provide technical advice to the U.S. rescue effort and to assess structural damage. This report is primarily based on […]
32 Years After Michoacán: Preliminary Reconnaissance Observations in the Aftermath of the September 19, 2017 Puebla-Morelos Earthquake
Abstract In the wake of the devastating Central Mexico earthquake on Tuesday, September 19th, a team of SOM engineers traveled to Mexico City to contribute to post-disaster recovery efforts. Shortly after the 7.1 magnitude earthquake struck, three structural engineers based in SOM’s San Francisco and Los Angeles offices—Abel Diaz (M.EERI, 2011), Patrick Murren, and Samantha […]