Since 1889, when Ernst von Rebeur-Paschwitz recorded the first teleseismic seismogram in Potsdam, worldwide major earthquakes are identified, located and analysed by seismologists and institutions located at great distance from the hypocenter. The modern broad-band instruments allow sensitivities and signal processing unthinkable only few decades ago, when the previous M8 Mexican earthquake occurred. We briefly present some information about earthquake characteristics and the space-time evolution of the most recent seismicity in Central Americas, as recorded by the main European seismological agencies (GFZ, EMSC, OGS). Early warning systems for earthquake and tsunami are now widespread; citizenship's testimonies of damage surf on internet and cross the oceans faster than seismic waves; land movements are detected by satellites put in space by several international agencies. All these facts help diminuishing the time needed for the immediate response to catastrophes whilst the times of recovery, mitigation and preparedness remain substantially unchanged. Witnesses' testimonies and photos to assess an earthquake's impact (effects on buildings and landscapes) are gathered by EMSC by just clicking on a simple illustration. LastQuake's users will be able to describe how they felt their earthquake and make valued contributions to the EMSC seismologists but also with their friends on Facebook and their followers on Twitter. The earthquakes occurred in Mexico in September 2017 are the first events well documented by LASTQUAKE app. By involving citizens and using them as a primary source of information, scientists can study the population reaction to seismic events (sociology of risk and risk management), and obtain valuable testimonies on the seismic events themselves. Follow the Citizen Seismology EMSC project.
RECENT SEISMICITY IN CENTRAL AMERICA: TAKE A LOOK FROM EUROPE
E Esposito;
2017
Abstract
Since 1889, when Ernst von Rebeur-Paschwitz recorded the first teleseismic seismogram in Potsdam, worldwide major earthquakes are identified, located and analysed by seismologists and institutions located at great distance from the hypocenter. The modern broad-band instruments allow sensitivities and signal processing unthinkable only few decades ago, when the previous M8 Mexican earthquake occurred. We briefly present some information about earthquake characteristics and the space-time evolution of the most recent seismicity in Central Americas, as recorded by the main European seismological agencies (GFZ, EMSC, OGS). Early warning systems for earthquake and tsunami are now widespread; citizenship's testimonies of damage surf on internet and cross the oceans faster than seismic waves; land movements are detected by satellites put in space by several international agencies. All these facts help diminuishing the time needed for the immediate response to catastrophes whilst the times of recovery, mitigation and preparedness remain substantially unchanged. Witnesses' testimonies and photos to assess an earthquake's impact (effects on buildings and landscapes) are gathered by EMSC by just clicking on a simple illustration. LastQuake's users will be able to describe how they felt their earthquake and make valued contributions to the EMSC seismologists but also with their friends on Facebook and their followers on Twitter. The earthquakes occurred in Mexico in September 2017 are the first events well documented by LASTQUAKE app. By involving citizens and using them as a primary source of information, scientists can study the population reaction to seismic events (sociology of risk and risk management), and obtain valuable testimonies on the seismic events themselves. Follow the Citizen Seismology EMSC project.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
