King Saud University Repository >
King Saud University >
King Saud University Initial Collection >

Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/4330

Title: Recent seismic activity in the N®12T'HE N Red sea
Authors: AL-Amri, Abdullah M. S.
Keywords: Seismic activity
12T'HE N
Swarm activity
Red sea
Issue Date: 1-Mar-1995
Publisher: Elsevier
Citation: Journal of Geodynamics: 20 (3); 243-253
Abstract: Recent seismicity and swarm activity in the northern Red Sea have been examined in relation to the tectonics and structures indicated by surface geology and marine magnetic anomalies.Seismicity appears to be low compared to the rest of the Red Sea. Sixty eight earthquakes recorded during the period 1964-1993 had body-wave magnitudes between 3.8 and 6. On 18 February 1992, a swarm of earthquakes began in the northern Red Sea and lasted for about 5 days. More than 180 local earthquakes were detected between 25.79 °-26.89 °N latitudes and 34.74°-35.57 °E longitudes, 12 of which were discernible enough on seismograms to establish epicenters and magnitudes. The majority of seismic activity of this swarm is clustered in the area located between lat. 26.7° and 27.3°. The most remarkable aspect of this earthquake swarm sequence is the migration of epicenters northward by about 100 km in 5 days with focal depths less than 20 km. This study and historical data confirm that the relatively low level of seismicity should not be used as an argument for minimizing the probability of seismic hazard. This swarm may release energy that can be accumulated to cause larger events in the future. This study, however, does not agree with the previous idea which states that the northern Red Sea is considered to be a seismic gap, where the faults are locked and do not generate earthquakes.
Description: Dept. of Geology, King Saud University, P.O. Box 2455, Riyadh, Saudi Arabia, 11451
URI: http://hdl.handle.net/123456789/4330
ISSN: 0264-3707
Appears in Collections:King Saud University Initial Collection

Files in This Item:

File Description SizeFormat

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


DSpace Software Copyright © 2002-2009 MIT and Hewlett-Packard - Feedback