Felt reports collected by the European-Mediterranean Seismological Centre (EMSC) and aftershocks distribution for a selection of 36 global earthquakes between 2014 and 2020

Cite as:

Böse, Maren; Julien-Laferrière, Sylvain; Bossu, Rémy; Massin, Frédérick (2021): Felt reports collected by the European-Mediterranean Seismological Centre (EMSC) and aftershocks distribution for a selection of 36 global earthquakes between 2014 and 2020. GFZ Data Services. https://doi.org/10.5880/fidgeo.2020.039

Status

I N R E V I E W : Böse, Maren; Julien-Laferrière, Sylvain; Bossu, Rémy; Massin, Frédérick (2021): Felt reports collected by the European-Mediterranean Seismological Centre (EMSC) and aftershocks distribution for a selection of 36 global earthquakes between 2014 and 2020. GFZ Data Services. https://doi.org/10.5880/fidgeo.2020.039

Abstract

The European-Mediterranean Seismological Centre (EMSC) is a non-profit scientific organization aiming at establishing and operating a rapid earthquake detection system globally and in particular in the European and Mediterranean regions as well as facilitating exchange between seismological institutes. The EMSC has been a pioneer in citizen seismology by collecting in-situ information on the earthquake impact directly from the witnesses.

The EMSC has been collecting citizen intensity felt reports at a global scale for many years via two channels: its websites and its “LastQuake” smartphone application. These felt reports are collected through a set of 12 cartoons representing the 12 levels of the European Macroseismic Scale (Grünthal, 1998). They provide rapid information on how the earthquake’s impact is felt by the local population. The EMSC felt reports were shown to be consistent with the USGS Did You Feel It? (Wald et al., 2011) responses and with manually derived macroseismic datasets (Bossu et al., 2017). Such felt reports are provided for a set of 36 earthquakes, each tagged with a unique ID number. They are only considered for intensity values of up to 10, since higher values are unrealistic.

Additionally, an interactive map of the aftershocks distribution is provided for each earthquake. These aftershocks are selected from the EMSC catalogue in the 14 days after the event and within 500km of the epicentre location. On each map, the beachball representing the two nodal planes as given by the Global Centroid Moment Tensor catalogue (Dziewonski et al., 1981; Ekstrom et al., 2012) is displayed at the epicentre location.

For each event (identified by unique id number), the first line indicates catalogue information on the earthquake (event_id, region, origin_time (UTC), latitude, longitude, depth, magnitude, strike angle from GCMT) Each following line is a felt report gathered by the EMSC including, the longitude, latitude, reported intensity and report time.

Authors

Böse, Maren;Swiss Seismological Service (SED), ETH Zurich, Switzerland
Julien-Laferrière, Sylvain;European-Mediterranean Seismological Centre (EMSC), Bruyères-le-Châtel, France
Bossu, Rémy;European-Mediterranean Seismological Centre (EMSC), Bruyères-le-Châtel, France;CEA, DAM, DIF, Arpajon, France
Massin, Frédérick;Swiss Seismological Service (SED), ETH Zurich, Switzerland