HYPOCENTER DETERMINATION AND CLUSTERING OF VOLCANO-TECTONIC EARTHQUAKES IN GEDE VOLCANO 2015

Aulia Kharisma Nugraha, Sukir Maryanto, Hetty Triastuty

Abstract


Gede volcano is an active volcano in West Java, Indonesia.  Research about determination the volcano-tectonic earthquake source positions has given results using volcano-tectonic earthquakes data from January until November 2015. Volcano-tectonic earthquakes contained deep (VT-A) have frequency (maximum amplitude) range 5 – 15 Hz. Furthermore, they contain shallow earthquake, VT-B have range 3-5 Hz and LF have range 1-3 Hz. Geiger’s Adaptive Damping (GAD) methods used for determining the hypocenter of these volcano-tectonic (VT) events. Hypocenter distribution divided into 4 clusters. Cluster I located in the crater of Gede volcano dominated by VT-B earthquakes their depth range 2 km below MSL to 2 km above MSL including the VT-B swarm. The seismic sources in cluster I indicated dominant due to the volcanic fluid or gas filled in conduit pipes. Cluster II located at the west of Gede volcano caused by Gede-Pangrango fault-line dominated by VT-A earthquakes with depths range 1.5 km below MSL to 700 m above MSL. Cluster III located in the North of Gede volcano dominated by VT-A events there caused by graben fault area with those depths range 7.5 – 1.65 km below MSL. Cluster IV located in South West of Gede volcano contained VT-A earthquakes with depth range at 10 km below MSL and VT-B earthquakes this depth 2 km below MSL. Due to magma intrusion filled into fractures of the fault in the West of Gede volcano this shallow magma filling-fractures and degassing in subsurface assumed dominates the volcano-tectonic events from January to November 2015 due to faults extends from North to South occured in the West of Gede volcano.


Keywords


Gede;volcano;volcano-tectonic;earthquake;hypocenter

Full Text:

PDF

References


Maryanto S, Iguchi M, Ohkura T, Hendrasto M, Hidayati S, Loeqman A, Suparman Y, Surono. Seismicity South of Guntur volcano , West Java , Indonesia. In: Annuals of Disasster Preventation Research Institute Kyoto University.; 2010:277–288.

Iguchi M, Suantika G, Sulaeman C, Wildan A, Sutawidjaja IS, Kriswati E, Kristianto, Solihin A, Surono, Triastuty H. Source Mechanisms of Volcanic Earthquakes at Some Volcanoes in Indonesia. Bandung; 2001.

McCausland W, White R, Indrastuti N, Gunawan H, Patria C, Suparman Y, Putra A, Triastuty H, Hendrasto M. Using a process-based model of pre-eruptive seismic patterns to forecast evolving eruptive styles at Sinabung Volcano, Indonesia. Journal of Volcanology and Geothermal Research. 2017.

Andreastuti S, Paripurno E, Gunawan H, Budianto A, Syahbana D. Character of community response to volcanic crises at Sinabung and Kelud volcanoes. Journal of Volcanology and Geothermal Research. 2017.

Iguchi M, Surono, Nishimura T, Hendrasto M, Rosadi U, Ohkura T, Triastuty H, Basuki A, Loeqman A, Maryanto S, Ishihara K, Yoshimoto M, Nakada S, Hokanishi N. Methods for Eruption Prediction and Hazard Evaluation at Indonesian Volcanoes. Journal of Disaster Research. 2012;7(1):26–36.

Mulyadi D, Suantika G. Pengamatan seismik dan pengukuran suhu G. Gede Jawa Barat Juni – Juli 2002.; 1992.

Mulyana I, Basuki A. Laporan Penelitian dan Pengamatan Gunung Gede 2013; 2013.

Belousov A, Belousova M, Krimer D, Costa F, Prambada O, Zaennudin A. Volcaniclastic stratigraphy of Gede Volcano, West Java, Indonesia: How it erupted and when. Journal of Volcanology and Geothermal Research. 2015;301:238–252.

Belousov A, Belousova M, Zaennudin A, Prambada O. How and when erupted Gede volcano in West Java: The story told by volcaniclastic stratigraphy. In: Eos, Transactions, American Geophysical Union.Vol 93.; 2012.

Situmorang T, Hadisantono RD. Peta

Geologi Gunungapi Gede, Cianjur, Jawa Barat. Scale 1:50000. Direktorat Vulkanologi; 1992.

Hasan MM, Triastuty H, Santosa BJ, Widodo A. Hypocenter Distribution of Low Frequency Event At Papandayan Volcano. Jurnal Neutrino:Jurnal Fisika dan Aplikasinya. 2016;9(1):10.

Nishi K. Hypocenter Calculation Software GAD (Geiger’s method with Adaptive Damping). Silver Expert JICA Indonesia; 2005.

Indrastuti N. Studi Kegempaan dan Seismik Tomografi Gunung Sinabung. 2013

Buurman H, West ME, Thompson G. The seismicity of the 2009 Redoubt eruption. Journal of Volcanology and Geothermal Research. 2013;259(September 2008):16–30.




DOI: http://dx.doi.org/10.18860/neu.v9i2.4103

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Jurnal Neutrino:Jurnal Fisika dan Aplikasinya

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Editorial Address:
Department of Physics, Faculty of Sains and Technlogy, Maulana Malik Ibrahim State Islamic University of Malang, Indonesia
B.J. Habibie 2nd Floor  
Gajayana st. No.50 Malang 65144
Telp. 082-337-308-100
Email: neutrino@uin-malang.ac.id

Creative Commons License

This work is licensed under CC BY-NC-SA

© All rights reserved 2015. Jurnal Neutrino:Jurnal Fisika dan Aplikasinya (ISSN:1979-6374 , EISSN:2460-5999)

View My Stats

Indeksasi Nasional dan Internasional

 

View My Stats