09:15 〜 09:30
[SCG60-02] Strong Ground Motion Characteristics of the 2023 South-Eastern Turkey earthquake of Mw 7.8
キーワード：2023年トルコ東南部地震、強震動
On February 6, 2023, at 4:17 local time, an earthquake of Mw 7.8 occurred in southeastern Turkey, causing destructive damage in the source area and adjacent northwestern Syria. The earthquake occurred along the East Anatolian Fault Zone. An Mw 7.5 earthquake occurred along the Sürgü Fault about 9 hours later, and high seismic activity has continued along the fault zone for about 200 km.
The Disaster and Emergency Management Authority (AFAD) has released strong-motion observation records through Turkey Accelerometric Database and Analysis System (TADAS), and many strong motion records have been obtained. The ground motion amplitude and seismic intensity are high along the East Anatolian Fault Zone, and one of them in Hassa reach seismic intensity of 7 on the JMA-scale. Here, we compare the strong motion characteristics of these records with those from past earthquakes. And we estimated the source fault rupture velocity using the records along the Amanos segment that consists of the southwestern part of the Mw 7.8 source fault, and will discuss how the rupture propagated along the source fault. Preliminary evaluation indicated that this segment ruptured from northeast to southwest with a delay of about 20 seconds after the rupture initiation, and the average rupture velocity was estimated to be about 3.5 km/s.
We offer my condolences to the victims. We used TADAS-AFAD, Turkey, strong motion data. We acknowledge those involved in the strong motion observation.
The Disaster and Emergency Management Authority (AFAD) has released strong-motion observation records through Turkey Accelerometric Database and Analysis System (TADAS), and many strong motion records have been obtained. The ground motion amplitude and seismic intensity are high along the East Anatolian Fault Zone, and one of them in Hassa reach seismic intensity of 7 on the JMA-scale. Here, we compare the strong motion characteristics of these records with those from past earthquakes. And we estimated the source fault rupture velocity using the records along the Amanos segment that consists of the southwestern part of the Mw 7.8 source fault, and will discuss how the rupture propagated along the source fault. Preliminary evaluation indicated that this segment ruptured from northeast to southwest with a delay of about 20 seconds after the rupture initiation, and the average rupture velocity was estimated to be about 3.5 km/s.
We offer my condolences to the victims. We used TADAS-AFAD, Turkey, strong motion data. We acknowledge those involved in the strong motion observation.