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Record #109816:

Source mechanism of the 1987 Vatnafjöll earthquake in south Iceland / Ingi Th. Bjarnason, Páll Einarsson.

Title: Source mechanism of the 1987 Vatnafjöll earthquake in south Iceland / Ingi Th. Bjarnason, Páll Einarsson.
Author(s): Bjarnason, Ingi Th.
Einarsson, Páll.
Date: 1991.
In: Journal of Geophysical Research. (1991.), Vol. 96(B3) (1991)
Abstract: Earthquake of 25 May 1987 was largest to occur in Iceland since 1976. Foreshocks and aftershocks define elongated N-S epicentral area 12 km long and 4 km wide, with hypocentral depths mostly between 6 and 13 km. Rupture initiated near base of crust and propagated upward along approximately 10 km long fault, but did not reach surface. Centroid depth is well constrained and is between 5 and 8 km depth at 95% confidence level. Seismic moment is 9.1 x 10²⁴ dyn cm. Source has relatively short duration of 3 s, which may indicate higher stress drop than global average of earthquakes of this size.
Notes:

Journal of Geophysical Research. Vol. 96(B3) :4313-4324 (1991).

Keywords: 550.341 -- Earthquakes.
550.834 -- Seismic survey methods.
551.21 -- Volcanoes.
A -- Geophysical sciences (general).
(*35) -- Iceland.
SPRI record no.: 109816

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100 1# ‡aBjarnason, Ingi Th.
245 10 ‡aSource mechanism of the 1987 Vatnafjöll earthquake in south Iceland /‡cIngi Th. Bjarnason, Páll Einarsson.
260 ## ‡a[S.l.] :‡b[s.n.],‡c1991.
300 ## ‡ap. 4313-4324 :‡bdiags., tables, maps.
500 ## ‡aJournal of Geophysical Research. Vol. 96(B3) :4313-4324 (1991).
520 3# ‡aEarthquake of 25 May 1987 was largest to occur in Iceland since 1976. Foreshocks and aftershocks define elongated N-S epicentral area 12 km long and 4 km wide, with hypocentral depths mostly between 6 and 13 km. Rupture initiated near base of crust and propagated upward along approximately 10 km long fault, but did not reach surface. Centroid depth is well constrained and is between 5 and 8 km depth at 95% confidence level. Seismic moment is 9.1 x 10²⁴ dyn cm. Source has relatively short duration of 3 s, which may indicate higher stress drop than global average of earthquakes of this size.
650 07 ‡a550.341 -- Earthquakes.‡2udc
650 07 ‡a550.834 -- Seismic survey methods.‡2udc
650 07 ‡a551.21 -- Volcanoes.‡2udc
650 07 ‡aA -- Geophysical sciences (general).‡2local
651 #7 ‡a(*35) -- Iceland.‡2udc
700 1# ‡aEinarsson, Páll.
773 0# ‡7nnas ‡tJournal of Geophysical Research. ‡gVol. 96(B3) (1991) ‡wSPRI-35252
917 ## ‡aUnenhanced record from Muscat, imported 2019
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