10:30 〜 10:45
[J02-2-01] Comparison of macroseismic studies of two similar megathrust earthquakes in Ecuador
The 2016 Muisne earthquake (7.8 Mw) in Ecuador was one of the most damaging events in the last 50 years in the country. This event caused 663 fatalities and total collapse of several structures in the epicentral zone. Comparing this earthquake with the megathrust event of 1942, 7.8 Mw, the main characteristics of the rupture process are recognized; however, distribution of damages are very different.
In this paper a comparison of the intensities of the two mentioned events with intensity attenuation equations and ground motion to intensity conversion equations (GMICEs) is performed. A revision of the original evaluation of the 1942 earthquake is included. This comparison indicates that the seismic intensities for the 1942 event might be overestimated which could affect the general shape of the maximum intensity map. Finally, shake maps for the mainshock and two biggest aftershocks are generated using strong motion signals of the National Accelerometric Network. The latest, to observe amplification patterns due to site effects.
In this paper a comparison of the intensities of the two mentioned events with intensity attenuation equations and ground motion to intensity conversion equations (GMICEs) is performed. A revision of the original evaluation of the 1942 earthquake is included. This comparison indicates that the seismic intensities for the 1942 event might be overestimated which could affect the general shape of the maximum intensity map. Finally, shake maps for the mainshock and two biggest aftershocks are generated using strong motion signals of the National Accelerometric Network. The latest, to observe amplification patterns due to site effects.