DOI: 10.1029/1999gl900569. A new model for volcanic earthquake at Unzen Volcano: Melt Rupture Model

A new model for volcanic earthquake at Unzen Volcano: Melt Rupture Model

10.1029/1999gl900569

Crossref journal-article

American Geophysical Union (AGU)

Geophysical Research Letters (13)

Abstract

Small earthquakes occurred inside the flowing magma during the 1991–1995 activities of Unzen Volcano. This paradoxical phenomenon can be explained when we consider that even a flowing magma fails brittly under the condition that the product of viscosity and strain rate of magma exceeds a certain threshold value. The estimated strain rate of magma in the conduit leads us to the conclusion the brittle failure is expected when the viscosity is over 1011.5 Pa s. Laboratory measurements of samples show that this viscosity range can be attained when the temperature is under 850°C in dry condition, and 800°C with 0.6 wt.% water. Considering the temperature from Fe‐Ti oxide geothermometer (780–880°C) and the gas temperature (800°C), the brittle failure condition could be satisfied inside the conduit. The melt failure by shear flow could be the source of the earthquakes occurred at the summit area.

Bibliography

Goto, A. (1999). A new model for volcanic earthquake at Unzen Volcano: Melt Rupture Model. Geophysical Research Letters, 26(16), 2541â2544. Portico.

Authors 1

Akio Goto (first)

References 22 Referenced 102

10.1007/BF00203214
10.1103/PhysRevB.49.95
10.1029/94JB00135
10.1007/BF00197020
{'key': 'e_1_2_1_6_1', 'first-page': '38', 'article-title': 'Growth and movement of the Unzendake lava dome (abstract)', 'author': 'Fukui K.', 'year': '1991', 'journal-title': 'The Fall Meeting of the Volcanological Society of Japan'} / The Fall Meeting of the Volcanological Society of Japan / Growth and movement of the Unzendake lava dome (abstract) by Fukui K. (1991)
{'key': 'e_1_2_1_7_1', 'first-page': '267', 'article-title': 'Viscosity measurements of dome lava and volcanic ejecta of Unzen Volcano (in Japanese)', 'volume': '39', 'author': 'Goto A.', 'year': '1994', 'journal-title': 'Bull. Volcanol. Soc. Japan'} / Bull. Volcanol. Soc. Japan / Viscosity measurements of dome lava and volcanic ejecta of Unzen Volcano (in Japanese) by Goto A. (1994)
10.1029/94JB02985
10.1007/BF00371146
{'key': 'e_1_2_1_10_1', 'first-page': '116', 'article-title': 'Earthquakes occurring beneath the crater of Unzen Volcano 1. Seismic activity (abstract)', 'author': 'Matsuwo N.', 'year': '1992', 'journal-title': 'Japan Earth and Planetary Science Joint Meeting'} / Japan Earth and Planetary Science Joint Meeting / Earthquakes occurring beneath the crater of Unzen Volcano 1. Seismic activity (abstract) by Matsuwo N. (1992)
{'key': 'e_1_2_1_11_1', 'first-page': '148', 'article-title': 'Mineralogy of lavas of 1991–1992 eruption at Unzen Volcano (abstract)', 'author': 'Nakada S', 'year': '1992', 'journal-title': 'The Fall Meeting of the Volcanological Society of Japan'} / The Fall Meeting of the Volcanological Society of Japan / Mineralogy of lavas of 1991–1992 eruption at Unzen Volcano (abstract) by Nakada S (1992)
10.1016/0377-0273(93)90070-8
10.1016/S0377-0273(98)00131-0
{'key': 'e_1_2_1_14_1', 'first-page': '78', 'article-title': 'Compositional diversity of Unzen dome lavas', 'author': 'Nakada S.', 'year': '1997', 'journal-title': 'Proc. Unzen International Workshop: Decade volcano and Scientific drilling'} / Proc. Unzen International Workshop: Decade volcano and Scientific drilling / Compositional diversity of Unzen dome lavas by Nakada S. (1997)
{'key': 'e_1_2_1_15_1', 'first-page': '115', 'article-title': 'A model of the 1991 eruption of Unzen volcano inferred from petrographic textures of the ejecta (in Japanese with English abstract)', 'volume': '46', 'author': 'Sato H.', 'year': '1996', 'journal-title': 'Mem. Geol. Soc. Japan'} / Mem. Geol. Soc. Japan / A model of the 1991 eruption of Unzen volcano inferred from petrographic textures of the ejecta (in Japanese with English abstract) by Sato H. (1996)
Sato H.M.KusakabeT.KitamuraS.Nakada Degassing and crystallization of the 1991 dacite dome lavas of Unzen Volcano Japan Todai Symposium 1995 The Roles of Magmas in the Evolution of the Earth Jan. 18 to 20 1995
10.2475/ajs.272.9.870
{'key': 'e_1_2_1_18_1', 'first-page': '17', 'article-title': 'Seismic activity beneath the lava domes of Unzen Volcano (abstract)', 'author': 'Shimizu H.', 'year': '1992', 'journal-title': 'The Fall Meeting of the Volcanological Society of Japan'} / The Fall Meeting of the Volcanological Society of Japan / Seismic activity beneath the lava domes of Unzen Volcano (abstract) by Shimizu H. (1992)
{'key': 'e_1_2_1_19_1', 'first-page': '609', 'article-title': 'Dynamics of flowage and viscosity of the 1991 lava of Unzen Volcano, Kyushu, Japan (in Japanese with English abstract)', 'volume': '44', 'author': 'Suto S.', 'year': '1993', 'journal-title': 'Bull. Geol. Surv. Japan'} / Bull. Geol. Surv. Japan / Dynamics of flowage and viscosity of the 1991 lava of Unzen Volcano, Kyushu, Japan (in Japanese with English abstract) by Suto S. (1993)
{'key': 'e_1_2_1_20_1', 'first-page': '63', 'article-title': 'Seismic observations and infrared thermal surveys of the 1993–1994 eruption of Unzen Volcano', 'volume': '15', 'author': 'Umakoshi K.', 'year': '1993', 'journal-title': 'Jour. Natural Disaster Sci.'} / Jour. Natural Disaster Sci. / Seismic observations and infrared thermal surveys of the 1993–1994 eruption of Unzen Volcano by Umakoshi K. (1993)
10.1029/JB095iB10p15695
10.1007/BF00199663
10.1016/0009-2541(95)00171-9

Dates

Type	When
Created	21 years, 8 months ago (Dec. 8, 2003, 5:45 p.m.)
Deposited	1 year, 9 months ago (Nov. 22, 2023, 7:39 a.m.)
Indexed	1 day, 16 hours ago (Aug. 21, 2025, 2:03 p.m.)
Issued	26 years ago (Aug. 15, 1999)
Published	26 years ago (Aug. 15, 1999)
Published Online	26 years ago (Aug. 15, 1999)
Published Print	26 years ago (Aug. 15, 1999)

Funders 0

None

BibTeX

@article{Goto_1999, title={A new model for volcanic earthquake at Unzen Volcano: Melt Rupture Model}, volume={26}, ISSN={1944-8007}, url={http://dx.doi.org/10.1029/1999gl900569}, DOI={10.1029/1999gl900569}, number={16}, journal={Geophysical Research Letters}, publisher={American Geophysical Union (AGU)}, author={Goto, Akio}, year={1999}, month=aug, pages={2541–2544} }

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