Refine
Has Fulltext
- yes (2)
Language
- English (2)
Is part of the Bibliography
- no (2)
Keywords
- Seismologie (2)
- GITEWS (1)
- Laufzeitresiduen (1)
- Receiver Functions (1)
- Receiver Funktionen (1)
- Seismology (1)
- Southeast Asia (1)
- Subduction (1)
- Subduktion (1)
- Sumatra (1)
- Südostasien (1)
- Wellengeschwindigkeiten (1)
- residuals (1)
- seismology (1)
- traveltime (1)
Institute
Receiver functions are a good tool to investigate the seismotectonic structure beneath the a seismic station. In this study we apply the method to stations situated on or near Sumatra to find constraints on a more detailed velocity model which should improve earthquake localisation. We estimate shallow Moho-depths (~ 21 km) close to the trench and depths of ~30 km at greater distances. First evidences for the dip direction of the slab of ~60° are provided. Receiver functions were calculated for 20 stations for altogether 110 earthquakes in the distance range between 30° and 95° from the receiver. However the number of receiver functions per station is strongly variable as it depends on the installation date, the signal-to-noise-ratio of the station and the reliability of the acquisition.
Traveltime residuals for worldwide seismic stations are calculated. We use P and S waves from earthquakes in SE-Asia at teleseismic and regional distances. The obtained station residuals help to enhance earthquake localisation. Furthermore we calculated regional source dependent station residuals. They show a systematic dependence of the locality of the source. These source dependent residuals reflect heterogenities along the path and can be used for a refinement of earthquake localisation.