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1971 Solomon Islands earthquakes

Earthquakes in Papua New Guinea

Field	Value
title	1971 Solomon Islands earthquakes
map2	{{Location map+	Papua New Guinea
{{Location map~	Papua New Guinea	mark	Red pog.svg	lat_deg = -5.52	lon_deg = 153.90	label=July 14}}
{{Location map~	Papua New Guinea	mark	Red pog.svg	lat_deg = -4.89	lon_deg = 153.18	label=July 26	position=left}}
AlternativeMap	Papua New Guinea relief location map.jpg
relief	yes
position	top
width	250
float	right
tags	y
timestamp	doublet
timestamp-A	1971-07-14 06:11:29
timestamp-B	1971-07-26 01:23:22
isc-event-A	782181
isc-event-B	782684
anss-url-A	iscgem782181
anss-url-B	iscgem782684
local-time-A	16:11:29
local-time-B	11:23:22
magnitude-A	, (ISC)
(ANSS)
magnitude-B	, (ISC)
(ANSS)
depth	A: 45 km
B: 37 km
intensity	A:
B:
casualties	2 dead, 5 injured

The 1971 Solomon Islands earthquakes occurred in the northern part of the Solomon Islands, within Papua New Guinea as a doublet earthquake. The first large shock occurred on July 14 at 06:11 UTC with a magnitude of 8.0. The second large event occurred on July 26 at 01:23 UTC with a magnitude of 8.1. The initial event on July 14 caused a tsunami, which was observed in Rabaul. The earthquake of July 26 triggered a tsunami with a 3.4 m runup in New Britain.

Shallow, large thrust earthquakes in the Solomon Islands tend to occur in multiplets. Examples of such earthquakes include the doublets occurred in 1971, 1974, and 1975. The 1971 doublet occurred at the junction of two trenches. The July 14 earthquake is located in the northwestern Solomon Islands Trench, while the July 26 earthquake ruptured the northeastern New Britain Trench. The July 14 earthquake and the July 26 earthquake were caused by the subduction of the Solomon Sea plate beneath the Pacific plate and the Bismark Sea Plate, respectively. The 1971 sequence had the largest earthquake in 50 years in this region as it occurred.

References

(2001). "Spectral characterisation of tsunamis and seiches caused by tectonism and volcanism in Rabaul, Papua New Guinea". [[Springer Science+Business Media.
ITIC. (1996). "Tsunami newsletter – January 1996". International Tsunami Information Center.
(1989). "Source process of the great 1971 Solomon Islands doublet". [[Elsevier]].
(1980). "Earthquake doublets in the Solomon Islands". [[Elsevier]].
(2002). "International Handbook of Earthquake & Engineering Seismology". [[Academic Press]].
National Geophysical Data Center / World Data Service (NGDC/WDS). (1972). "Significant Earthquake Database". [[National Geophysical Data Center]], [[National Oceanic and Atmospheric Administration.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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