|
Titel |
On the possibility of the 2011 Tohoku-oki earthquake reactivating Shinmoe-dake volcano, southwest Japan: insights from strain data measured in vaults |
VerfasserIn |
K. Yamazaki, M. Teraishi, S. Komatsu, Y. Sonoda, Y. Kano |
Medientyp |
Artikel
|
Sprache |
Englisch
|
ISSN |
1561-8633
|
Digitales Dokument |
URL |
Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 9 ; Nr. 11, no. 9 (2011-09-29), S.2655-2661 |
Datensatznummer |
250009684
|
Publikation (Nr.) |
copernicus.org/nhess-11-2655-2011.pdf |
|
|
|
Zusammenfassung |
The Shinmoe-dake volcano in southwest Japan, which produced its first major
eruption in 52 yr on 26 January 2011 but had been quiescent since 1 March,
re-erupted on 13 March. It was only two days after the occurrence of the
M = 9.0 Tohoku-oki earthquake in eastern Japan. The coincidence of the two
events raises the question of whether the earthquake triggered the volcanic
activity. As a provisional but rapid assessment of this question, we examined
high-resolution strain data at a site located 18 km from Shinmoe-dake. In
terms of the Tohoku-oki earthquake, three points can be drawn from the strain
data: (1) static strain changes were less than 0.05 × 10−6,
which is too small to trigger an eruption; (2) the amplitudes of dynamic
strain changes are on the order of 10−6, which may trigger seismicity or
volcanic eruption; and (3) strain rates were not accelerated, which indicates
no significant change in magma pressure. Comparing these results with reports
of other eruptions coincident with seismic events, and considering a scenario
in which a seismic event triggered an eruption, we tentatively conclude that
the eruption on 13 March was not a triggered event. However, this conclusion
may be revised after analyzing seismic data. |
|
|
Teil von |
|
|
|
|
|
|