Spectral ratio analyses of explosion earthquakes at Sakurajima Volcano, Japan

Hasib, Mohammad; Nishimura, Takeshi; Nakahara, Hisashi

doi:10.1016/j.jvolgeores.2019.05.005

Cited by 8 publications

(8 citation statements)

References 20 publications

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“…This eruption style is identical to form mushroom shape volcanic clouds [7]. It is also often observed that the Vulcanian eruptions is followed by the continuous ash emissions for several minutes [8]. Previous study demonstrated that the source mechanism of explosion earthquakes during Vulcanian eruption which is interpretated by the rapid pressure release at the beginning [9,10,11].…”

Section: Introductionmentioning

confidence: 84%

“…Previous study demonstrated that the source mechanism of explosion earthquakes during Vulcanian eruption which is interpretated by the rapid pressure release at the beginning [9,10,11]. Then, the later part of explosion earthquakes is interpreted may be associated successive oscillations of the magma system during continuous ash emission [8]. Since the Sinabung volcano erupts frequently and generates many explosion earthquakes during October 1 to December 31, 2014 by the Center of Volcanology and Geological Hazard Mitigation (PVMBG) (see Figure 1).…”

Section: Introductionmentioning

confidence: 95%

“…The decreasing of energy is steeper than this study is also observed. Hasib et al in [8] clarify the mechanism of explosion earthquakes at Sakurajima volcano, which is the Vulcanian type of eruption frequently recorded. They inferred that explosion earthquake of Vulcanian eruption is generated by rapid pressure released followed by the successive oscillation of magma during continuous ash emission.…”

Section: -5 Hz 1-5 Hzmentioning

confidence: 99%

“…The seismic waveform of explosion earthquake is characterized by the gradually increases of the amplitudes for about 10 s or more from the onset times, reach the maximums and then gradually decrease with time. The waveform of explosion earthquake shows no clear P and S-waves for both horizontal and vertical components [8]. The explosion earthquake is classified as low frequency earthquakes with the dominant frequency is about 1-2 Hz [8].…”

Section: Introductionmentioning

confidence: 98%

“…The waveform of explosion earthquake shows no clear P and S-waves for both horizontal and vertical components [8]. The explosion earthquake is classified as low frequency earthquakes with the dominant frequency is about 1-2 Hz [8].…”

Section: Introductionmentioning

confidence: 98%

See 4 more Smart Citations

Analyses of explosion earthquakes at Sinabung Volcano: characteristics of waveform, spectra, and energy

Pritaningtyas,

Hasib,

Kriswati

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The characteristic of explosion earthquakes associated with lava avalanche at Sinabung volcano from October to December 2014 is investigated. The 1-component short-period seismometers which are Sukanalu (SKN), Laukawar (KWR), and Kebayaken (KBY) are used. All stations are located about 3-9 km away from the summit. The result shows the characteristics of these waveforms as follows; the amplitude increases rapidly to maximum for about 2-5 s, then the amplitude is almost constant for about 30-40 s followed by the gradual decrease of amplitude for about 40-50 s. Most of explosion earthquakes have a dominant frequency at about 1-4 Hz. The result also observed that the energy of explosion earthquake changes with lapse time and much stable for longer duration compared with explosion earthquake study at different volcano. Our result suggests that the explosion earthquake at Sinabung volcano may have a different waveform generation and/or mechanism to the general explosion earthquake at different volcano.

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