id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
esrj-33846	Al-Arifi, Nassir; Lashin, Aref; Al-Humidan, Saad	Migration of local earthquakes in the Gulf of Aqaba, North Red Sea	2012	6	.pdf	application/pdf	3046	51	25	Epicentral distributions of earthquakes (MD>3 5) for two sequences Where A is the 1993 sequence and B is the 1995 sequence Small and large arrows indicate the direction of the minimum and maximum compressive stresses respectively, according to small scale structures study (Reches 1987), and focal mechanism study (Al-Arifi 1996) figure 4. (a) Shows the local migration of strong aftershocks of the 1993 sequence in the Gulf of Aqaba (b) Shows profiles for jumping of strong aftershocks of the 1993 Gulf of Aqaba sequence The arrows indicate the direction of the local mi- gration and jumping est aftershock) The aftershocks moved northward Figure 4 shows strong aftershocks’ local migration regarding the 1993 sequence On the same day in which the mainshock occurred, activity was concentrated in the north between 28 70-28 85° N and 34 75-34 9° E where two strong aftershocks (Md 5 6 and 4 9) occurred 80 days after the mainshock the activity moved northwards again where another strong aftershock occurred at 29 0°N and 34 83°E Activity leaped to the south- west (still north of the mainshock) on the 3rd of November 1993 with another strong shock that occurred at 28 62°N and 34 6°E; activity then moved northwards where the last strong aftershock occurred on the 4th of December 1993 at 28 86°N and 34 41°E Figure 4 shows that the 1993 focal depth started with more than 10 km for foreshocks, no foreshock having less than 10 km depth The mainshock had the depth of 15 km and then the depth reduced with time from 11-12 km for the first two strong aftershocks until the last strong aftershock was at a depth of 2 km The 1995 sequence was similar, aftershock focal depth becoming reduced as time elapsed Such ‘jumping’ could be explained by earthquakes migrating northwards into an area where all seismicity was shal- lower than in the south of the Gulf As regards 1995 sequence local migra- tion it was difficult to determine a specific direction for a strong aftershock (even though the aftershocks generally moved northwards) results The focal mechanism solution for the mainshocks and the largest aftershocks for both sequences (1993 and 1995, Figure 5) included the flowing: 1)	cache/esrj-33846.pdf	txt/esrj-33846.txt