Shakemap Emilia-Romagna-Modena Earthquake May 29th 2012

June 18, 2012  
Filed under Seismology and Hazard

Figure 1 shows the shakemap computed by INGV using data of the Rete Accelerometrica Nazionale e Rete Accelerometrica Italia Settentrionale, for the peak ground acceleration (PGA) in %g.  This map was produced automatically using the data recorded by the seismic stations near the epicenter – (red...


Some notes about seismotectonics

June 18, 2012  
Filed under Seismology and Hazard

The May 20th event was generated along a seismogenic structure covered by the sediments of the Po plain; the focal mechanism is clearly reversal as shown in Figure 1. Detailed information about focal mechanism calculation can be found on the INGV website (http://cnt.rm.ingv.it/data_id//7223045800/map_dmt_review.pdf). Figure...


Short update on the earthquake sequence

June 18, 2012  
Filed under Seismology and Hazard

The earthquake of the 29th of May (Ml 5.8) triggered a sequence of earthquakes in the same region.  The sequence is summarized in Table I and represented in Figure 1. To note the stability of the focal mechanisms during the sequence. Table I. List of main events of the earthquake sequence from the...


Civil Protection report on strong motion and geological observations

The Italian Civil Protection has published a first report entitled “The Emilia thrust earthquake of 20 May 2012 (Northern Italy): strong motion and geological observations”, in collaboration with the University of Chieti (GeoSis-Lab), the University of Trieste and the Regione Umbria. You can download...


Summary of the 29th May aftershock

May 31, 2012  
Filed under General Information, Seismology and Hazard

After the strong earthquake on May 20th (see here), and following the constant seismic activity that has characterized the past few days with several small earthquakes (more than 700), another relevant seismic event was recorded on May 29th. A strong earthquake of local magnitude Ml 5.8 (Mw 5.65) occurred...


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...


Seismic Hazard Setting Map

May 23, 2012  
Filed under Maps and Records, Seismology and Hazard

The map below shows the location of the epicentre of the Emilia earthquake on the Italian map of seismic hazard (INGV). Seismic hazard map of Italy showing the location of the epicentre of the Emilia earthquake. Source: http://www.ingv.it/primo-piano/comunicazione/2012/05200508/map_haz.jpg


Accelerograms and ShakeMaps

May 23, 2012  
Filed under Maps and Records, Seismology and Hazard

The map below shows the position of the recording stations of the RAIS (Strong Motion Network of Northern Italy) and RAN (National Strong Motion Network) and the respective values of recorded peak ground acceleration. A preliminary report of the accelerograms and the response spectra of the RAIS stations...


Seismological characteristics

May 23, 2012  
Filed under Maps and Records, Seismology and Hazard

The event generated along a seismogenic structure covered by the sediments of the Po plane. The focal mechanism is clearly reversal. The figure below shows the focal mechanism and location proposed by INGV and the stations used to obtain the corresponding result. The detailed information using in the...