3:00 PM - 4:00 PM
[J04-P-02] An Earthworm based Earthquake Early Warning System with Integrated GMPEs and IPEs for Southwest Iberian Peninsula
The South Iberian Peninsula is located near a complex plate boundary between Eurasia and Africa. Several very large earthquakes have occurred, especially offshore Cape San Vicente and in the Gulf of Cadiz. The largest one, the 1755 Mw 8.5 Lisbon earthquake, was associated with a destructive tsunami causing more than 60,000 casualties and significant damage in the SW Iberian Peninsula and NW Morocco (Buforn et al. 1998; Baptista et al. 2003; Gutscher et al. 2006; Grandin et al. 2007).
This study presents the development and results of a prototype of an Earthquake Early Warning System (EEWS) (Kanamori, 2005) in front of potentially destructive earthquakes occurring in Southwest Iberian Peninsula (Pazos et al., 2015), within the framework of the Alertes-Rim Spanish project. The existence of potential targets and recent events as 1962 Mw 6.2 and 1969 Mw 7.8, make this region suitable for the implementation of an EEWS.
This EEWS, based on the Earthworm (USGS) tools, was implemented to automatically produce location scenarios, with an optimized location and estimated magnitude that minimize the warning time (Romeu et al., 2016). Furthermore, the most suitable ground motion and intensity prediction equations, for this region, have been selected and integrated into the EEWS to provide potential damages scenarios.
Once the setup stage was over, the prototype was put into operation early 2015. Comparing to Instituto Geografico Nacional (IGN) catalog, hypocentral locations and magnitudes assessment are fairly good. Lead times obtained are on the order of tens of seconds for the majority of targets, which is long enough to mitigate damage for a big area of the southern coasts of Portugal and Spain, demonstrating the possibility of a regional, reliable and effective EEWS in the region.
This study presents the development and results of a prototype of an Earthquake Early Warning System (EEWS) (Kanamori, 2005) in front of potentially destructive earthquakes occurring in Southwest Iberian Peninsula (Pazos et al., 2015), within the framework of the Alertes-Rim Spanish project. The existence of potential targets and recent events as 1962 Mw 6.2 and 1969 Mw 7.8, make this region suitable for the implementation of an EEWS.
This EEWS, based on the Earthworm (USGS) tools, was implemented to automatically produce location scenarios, with an optimized location and estimated magnitude that minimize the warning time (Romeu et al., 2016). Furthermore, the most suitable ground motion and intensity prediction equations, for this region, have been selected and integrated into the EEWS to provide potential damages scenarios.
Once the setup stage was over, the prototype was put into operation early 2015. Comparing to Instituto Geografico Nacional (IGN) catalog, hypocentral locations and magnitudes assessment are fairly good. Lead times obtained are on the order of tens of seconds for the majority of targets, which is long enough to mitigate damage for a big area of the southern coasts of Portugal and Spain, demonstrating the possibility of a regional, reliable and effective EEWS in the region.