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Analysis of peculiar volcanic earthquakes at Satsuma-Iojima volcano
Earth, Planets and Space volume 54, pages197–209(2002)
Fukuoka District Meteorological Observatory has continued seismic observations at Satsuma-Iojima volcano since September 1997. Of the daily number of seismic events at the volcano, which sometimes exceeded 100, several different types have been observed. Hypocenters of A-type earthquakes mostly existed in a shallow area within the volcanic island. Numerous peculiar earthquakes that have waveforms different from usual volcanic earthquakes were observed with the ascent of seismic activity. They have an emergent phase that precedes the appearance of the high-amplitude main phase by 5–8 seconds and consists of weak seismic waves increasing gradually in amplitude. This type of earthquakes is considered to be excited by a bubbling of gas and a succeeding shear fracture within the highly viscous rhyolitic magma.
Fukuoka District Meteorological Observatory, Report of Kyusyu District Mobile Volcano Observation at Satsuma Iojima volcano, 6, 21 pp., 1986 (in Japanese).
Fukuoka District Meteorological Observatory, Report of Kyusyu District Mobile Volcano Observation at Tsurumidake and Satsuma Iojima volcano, 13, pp. 41–59, 1993 (in Japanese).
Geological Survey of Japan, Recent volcanic activity at the summit of Iwodake, Satsuma-Iwojima, Report of Coordinating Committee for Prediction of Volcanic Eruption, 67, 79–82, 1997 (in Japanese).
Hamada, N., H. Jingu, and K. Ikumoto, On the Volcanic Earthquakes with Slowly Decaying Coda Wave, Bull. Volconol. Soc. Jpn., 21, 167–183, 1976 (in Japanese with English abstract).
Iguchi, M., Vertical expansion source model for the mechanisms of earthquakes originated in the magma conduct of an andesitic volcano: Sakurajima, Japan, Bull. Volcanol. Soc. Jpn., 39, 49–67, 1994.
Iguchi, M., K. Ishihara, T. Takayama, T. Tamekuri, H. Shinohara, and E. Saito, Volcanic activity at Satsuma-Iwojima during 1995–1998, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., 42 B-1, 1–10, 1999 (in Japanese with English abstract).
Ishihara, K. and M. Iguchi, The Relationship between Micro-earthquake Swarms and Volcanic Activity at Sakurajima Volcano, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., 32 B-1, 1–11, 1989 (in Japanese with English abstract).
Japan Meteorological Agency, Satsuma-Iojima, in National Catalogue of the Active Volcanoes in Japan (second edition), pp. 395–399, 1991 (in Japanese).
Kamo, K., T. Furusawa, and J. Akamatsu, Some Natures of Volcanic Microtremors at the Sakura-jima Volcano, Bull. Volconol. Soc. Jpn., 22, 41–58, 1977 (in Japanese with English abstract).
Kobayashi, T., Satsuma-Iojima, in Volcanoes in Japan, pp. 212–214, Maruzen, Tokyo, 1989 (in Japanese).
Nagamune, T., Volcanic tremors of C Type observed at Sakurajima, Bull. Volconol. Soc. Jpn., 20, 157–168, 1975 (in Japanese with English abstract).
Ohminato, T. and D. Ereditato, Broadband seismic observations at Satsuma-Iwojima volcano, Japan, Geophys. Res. Lett., 24, 2845–2848, 1997.
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Uchida, N., Sakai, T. Analysis of peculiar volcanic earthquakes at Satsuma-Iojima volcano. Earth Planet Sp 54, 197–209 (2002). https://doi.org/10.1186/BF03353019
- Seismic Event
- Seismic Station
- Love Wave
- Daily Number
- Summit Crater