Spectral and Waveform Cross-Correlation Analysis of Volcanic Tremor from The 2016 Eruption at Bromo Volcano, East Java
Abstract
Bromo volcano is one of a series of active volcanoes in Indonesia, located on the Tengger caldera, Probolinggo, East Java. Bromo volcano has increased volcanic activity in the end 2015 until early 2016. The research was conducted to determine the characteristics of volcanic tremors. The methods used to determine the characteristics of volcanic tremors are spectral analysis and cross-correlation waveform analysis. Spectrogram analysis obtained frequency value 1-8 Hz for volcanic tremor of Bromo Volcano. From the results of spectral analysis volcanic tremor, it’s can be seen the value of the frequency peaks irregular means the type of spasmodic tremor. Based on the pattern of the peaks of the tremor spectral analysis using 3 stations having the same pattern and the analysis of cross-correlation waveform volcanic tremor of Bromo volcano was indicated from the same source mechanism because the correlation coefficient value is good that ranged about 0.6 – 0.8.
Keywords
Full Text:
PDFReferences
V. M. Zobin, Introduction to Volcanic Seismology, Second edi., vol. 1. USA: Elsevier B.V., 2012.
V. Schlindwein, J. Wassermann, and F. Scherbaum, “Spectral analysis of harmonic tremor signals at Mt. Semeru volcano, Indonesia,” Geophysical Research Letters, vol. 22, no. 13. pp. 1685–1688, 1995.
K. I. Konstantinou and V. Schlindwein, “Nature, wavefield properties and source mechanism of volcanic tremor: A review,” J. Volcanol. Geotherm. Res., vol. 119, no. 1–4, pp. 161–187, 2003.
H. Buurman and M. E. West, “Seismic precursors to volcanic explosions during the 2006 eruption of Augustine Volcano,” Power, J.A., Coombs., M.L., Freymueller, J.T.,eds., 2006 Erupt. Augustine Volcano, Alaska U.S.G.S Prof. Pap. 1769, pp. 41–57, 2010.
H. Buurman, M. E. West, and G. Thompson, “The seismicity of the 2009 Redoubt eruption,” J. Volcanol. Geotherm. Res., vol. 259, no. September 2008, pp. 16–30, 2013.
A. Zaennudin, “Perbandingan antara erupsi Gunung Bromo Tahun 2010 – 2011 dan erupsi Kompleks Gunung Tengger,” J. Lingkung. dan Bencana Geol. Vol. 2 No. 1 April 2011 21 - 37, vol. 2, no. 1, pp. 21–37, 2011.
H. Triastuty, M. Iyan, A. S. N. F. Hery, Kuswandarto., W. Andrian., and P. Edy, “Erupsi Bromo Desember 2015 – Februari 2016,” GEOMAGZ(Majalah Geologi Populer), Bandung, Apr-2016.
Kementrian ESDM, “Peningkatan Status Gunung Bromo,” 2015. [Online]. Available: http://www.vsi.esdm.go.id/index.php/gunungapi/aktivitas-gunungapi/1027-peningkatan-status-gunung-bromo.
E. O. Brigham, “The Fast Fourier Transform,” Transform, vol. 1. p. 247, 1982.
H. Triastuty, “Analisis Fisis Tingkat Kegiatan Gunung Bromo Berdasarkan Spektral Tremor Dan Hiposenter Gempa Gunungapi,” Insitut Teknologi Bandung, 1996.
E. W. Weisstein, “Cross-Correlation,” 2017. [Online].Available: http://mathworld.wolfram .com/Cross-Correlation.html. [Accessed: 13-Feb-2017].
E. Gottschammer, “Volcanic tremor associated with eruptive activity at Bromo volcano,” Ann. Di Geofis., 1999.
S. Maryanto, M. Iguchi, and T. Tameguri, “Constraints on the source mechanism of harmonic tremors based on seismological, ground deformation, and visual observations at Sakurajima volcano, Japan,” J. Volcanol. Geotherm. Res., vol. 170, no. 3–4, pp. 198–217, 2008.
DOI: http://dx.doi.org/10.21776/ub.natural-b.2017.004.01.8
Refbacks
- There are currently no refbacks.