Summary of the 29th May aftershock
A strong earthquake of local magnitude Ml 5.8 (Mw 5.65) occurred at 09:00:03 italian time (07:00:03 UTC) in Emilia Romagna (province: Modena) in the seismic district of Pianura Padana emiliana, in the western part of the strip that was activated during the May 20th event (http://www.ingv.it/). The epicenter was identified by the Istituto Nazionale di Geofisica e Vulcanologia […]
Shake maps and comparison with recordings
Figure 1. The map below (Figure 2) shows the median values of PGA predicted with the Bindi et al. (2011) ground-motion prediction equation for soil type C for the horizontal component, plotted on top of the recorded values of PGA at the recording stations of the National Strong Motion Network (RAN) and the […]
Preliminary Report on the 2012, May 20th, Emilia Earthquake
This report presents the results of a preliminary survey in the area affected by the May 20, 2012 Emilia, Northern Italy, earthquake. In this report, a reconstruction of the local seismic catalogues is presented, the damage to historical buildings, rural buildings, industrial buildings and reinforced-concrete buildings surveyed on May 21-22 is described, and a short […]
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 […]
The Emilia thrust earthquake of 20 May 2012 (Northern, Italy): strong motions and geological observation
May 2012, National Civil Protection Department, Geosis-Lab Unichieti, University of Trieste, Regione Umbria- Regional Civil Protection On 20 May 2012, at 02:03:53 (UTC), Northern Italy was struck by an earthquake of’magnitude M 5.9 (lat 44.890 long 11.230). The mainshock was preceded by a M 4.1 event on 19 May and followed by four relevant aftershocks between […]
Red De Acelerógrafos Zona Norte, Terremoto Norte Chile 1 de Abril de 2014 Mw = 8.2, Informe Preliminar No. 1 (Spanish)
Read the Report: Red De Acelerógrafos Zona Norte, Terremoto Norte Chile 1 de Abril de 2014 Mw = 8.2, Informe Preliminar No. 1 (in Spanish) (1.75 MB PDF)
Video: Taiwan Earthquake Reconnaissance Briefing Webinar
Briefing content was a collaboration from more than five teams that traveled to the impacted region, and provided key insights into the various aspects of shaking characteristics, earthquake damage, response, and performance of pre-event mitigation measures. The topics discussed include: Geology & Seismology (6:00)by Kevin Clahan, Lettis Consultants International (representing GEER Team)Presentation PDF File […]
USGS Earthquake Science Center Seminars: Lessons from the South Napa Earthquake
Presentations included the following topics and speakers. Links have been provided below for any slides received by the Clearinghouse. Introduction – Jack Boatwright, USGS Earthquake sequence, aftershock probabilities & EEW – Brad Aagaard, USGS Aftershock sequence modeling – Andrea Llenos, USGS Earthquake relocations – Jeanne Hardebeck, USGS UAVSAR– Andrea Donnellan, NASA JPL Surface rupture & ground […]
USGS Event Page
https://earthquake.usgs.gov/earthquakes/eventpage/us20003k7a#executive
Ground Motion Assessment Summary
Figure 1. Historical seismicity of Chile – Source: CSN Several seismic motions have been felt since the main 8.4 Mw magnitude earthquake on 16 September 16 at 7:45 p.m. local Chilean time. As per 2 October, CSN had processed around 1100 aftershocks with magnitudes over 3.0, being the largest aftershock the one occurred […]