Ramdhan M., Widiyantoro S., Nugraha A. D., Métaxian Jean-Philippe, Saepuloh A., Daryono. (2019). Struktur kecepatan seismik di bawah gunung Merapi dan sekitarnya berdasarkan studi tomografi seismik waktu tempuh = Velocity structure beneath Merapi volcano and its surroundings based on seismic tomography travel-time study. Riset Geologi Dan Pertambangan, 29 (2), p. 227-238. ISSN 0125-9849.
Titre du document
Struktur kecepatan seismik di bawah gunung Merapi dan sekitarnya berdasarkan studi tomografi seismik waktu tempuh = Velocity structure beneath Merapi volcano and its surroundings based on seismic tomography travel-time study
Ramdhan M., Widiyantoro S., Nugraha A. D., Métaxian Jean-Philippe, Saepuloh A., Daryono
Source
Riset Geologi Dan Pertambangan, 2019,
29 (2), p. 227-238 ISSN 0125-9849
The relatively short eruption period of Merapi volcano is the reason for many earth scientists to investigate the processes that occur both beneath the surface and at the top of the volcano. The DOMERAPI seismic network consisting of 53 seismic stations was installed to understand the characteristics of the main magma reservoir under the volcano with a period of data recording from October 2013 to mid-April 2015. A total of 464 earthquakes were detected by DOMERAPI seismic network with the majority of the earthquake occured outside the seismic network because the volcano was inactive at that time. The earthquakes are used to delineate the main magma reservoir beneath the volcano. The main magma reservoir was identified at a depth of 15 km below mean sea level (MSL,) which is characterized by high Vp, a high Vp/Vs ratio and low Vs. The existence of shallow magma reservoirs related to fluid percolation was also clearly identified in this study which was at a depth of less than 5 km below MSL which was characterized by low Vp, a high Vp/Vs ratio and low Vs. The existence of deep magma reservoir was not identified in this study because of the limited resolution of seismic data.
