The rate of Seismic deformation in the Gulf of Aqaba as inferred from moment tensor summation

doi:10.21203/rs.3.rs-18454/v1

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The rate of Seismic deformation in the Gulf of Aqaba as inferred from moment tensor summation

https://doi.org/10.21203/rs.3.rs-18454/v1

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The main goal of this study is to quantify the rate of seismic deformation in the Gulf of Aqaba. The moment tensor summation technique based on the seismicity data, for all available historical and instrumental data (1900-2019), and reliable fault plane solutions was used to calculate the size and the shape of deformation. For the period from 1900 to 2019, the seismicity data was used to calculate the seismicity parameters (representing by the Gutenberg-Richter and moment-magnitude relations) and the spatial extent of the deformation zone. The fault parameters of forty-four earthquakes, having moment magnitudes range from 3.2 to 7.2, were used to construct the moment tensor summation and subsequently to calculate the rate of seismic deformation. The calculations showed that a predominant shear deformation acting in the Gulf of Aqaba is taken up by extension in a direction of N40.8 o E at a rate of 0.83±0.21 mm/yr. and compression in a direction of N131.6 o E at a rate of 0.32±0.05 mm/yr.; reflecting the Gulf of Aqaba is undergoing from shear deformation accommodated along a strike-slip fault. The obtained results exhibited that the present-day deformation in the Gulf of Aqaba is acting by the interaction of relative tectonic motions among African, Sinai and Arabia plates.

Astronomy

Focal mechanism

magnitude-frequency distribution

Moment-magnitude relationship

Seismic moment rate

Strain tensor

Velocity tensor

Principal stresses

Gulf of Aqaba

Table 1 The fault plane parameters of earthquakes used in the present analysis.

No.	Date	Time	Lat.	Long.	Depth	Mag	strike	dip	rake	References
1	19820323	104800	27.9	34.3	10	4.7ML	220	65	-40	Salamon et al. (2003)
2	19830203	134604.94	29.19	34.77	24	5.3Mw	360	80	14	Badawy & Horvath (1999)
3	19851231	194241.00	28.85	35.05	09.00	4.8ML	155.00	60.00	-030.00	Salamon et al. (2003)
4	19890909	000000.00	28.57	34.82	10.00	4.1ML	205.00	50.00	-110.00	Salamon et al. (2003)
5	19930703	233410.00	28.86	34.82	18.00	4.7ML	114.17	88.69	149.41	Hussein et al. (2013)
6	19930803	004305.00	28.73	34.55	17.00	6.0Mw	007.00	62.00	-117.00	ISC
7	19930803	124305.00	28.73	34.55	17.00	6.0ML	293.54	87.27	-157.17	Hussein et al. (2013)
8	19930803	163323.00	28.36	34.08	15.00	5.7ML	356.13	79.41	-082.81	Hussein et al. (2013)
9	19930807	045540.00	28.61	34.63	10.00	4.2ML	216.57	50.19	-042.41	Hussein et al. (2013)
10	19930820	230959.00	28.72	34.61	02.00	4.6ML	116.24	79.84	140.06	Hussein et al. (2013)
11	19931103	183932.00	28.70	34.65	07.00	4.9ML	086.20	76.13	-148.33	Hussein et al. (2013)
12	19931108	010602.00	28.69	34.65	08.00	4.7ML	303.34	80.49	-119.89	Hussein et al. (2013)
13	19931204	233411.00	28.89	34.80	10.00	4.6ML	093.21	68.07	-147.59	Hussein et al. (2013)
14	19951122	001526.00	29.07	34.73	18.00	7.2Mw	196.00	59.00	-015.00	ISC
15	19951122	124704.00	29.30	34.74	15.00	5.0ML	073.99	80.04	-150.11	Hussein et al. (2013)
16	19951122	221657.00	28.32	34.21	15.00	5.2ML	357.43	60.54	-068.49	Hussein et al. (2013)
17	19951123	000717.00	29.25	34.64	10.00	5.7Mw	199.00	77.00	007.00	Harvard CMT
18	19951124	164345.00	28.97	34.74	10.00	4.9ML	164.49	54.28	-068.04	Hussein et al. (2013)
19	19951211	013208.00	28.92	34.75	19.00	5.0ML	302.00	84.00	146.79	Hussein et al. (2013)
20	19960103	100526.00	28.60	35.25	10.00	4.8ML	113.43	59.77	-137.83	Hussein et al. (2013)
21	19960108	001318.00	29.38	34.82	06.00	3.8ML	339.96	78.86	164.20	Hussein et al. (2013)
22	19960116	061700.00	29.34	34.73	06.00	4.3ML	158.64	82.79	148.51	Hussein et al. (2013)
23	19960204	072300.00	29.45	34.94	06.00	3.6ML	293.84	77.43	-148.50	Hussein et al. (2013)
24	19960221	005951.00	28.80	34.78	10.00	5.3Mw	132.00	30.00	-104.00	Harvard CMT
25	19970510	000147.00	28.26	34.70	10.00	4.6Mw	114.00	89.00	150.00	ISC
26	20000308	142226.00	28.83	34.73	15.00	4.9Mw	182.00	48.00	-048.00	ISC
27	20000308	122229.00	28.64	34.57	10.00	4.8Mw	198.00	31.00	-018.00	ISC
28	20000308	142225.00	28.77	34.70	07.00	4.9ML	134.95	85.10	-169.32	Hussein et al. (2013)
29	20000406	063734.00	28.78	34.83	12.00	4.8ML	019.99	85.10	-012.08	Hussein et al. (2013)
30	20000803	142225.00	28.64	34.57	10.00	4.8ML	107.59	82.31	166.45	Hussein et al. (2013)
31	20010207	033900.00	29.26	35.01	21.00	3.6Mw	044.00	80.00	-005.00	ISC
32	20021110	005945.00	28.23	34.62	16.00	3.9ML	180.27	47.30	-083.94	Hussein et al. (2013)
33	20040922	120023.00	28.45	34.60	10.30	3.2ML	270.22	64.05	-076.21	Hussein et al. (2013)
34	20050120	134100.00	28.50	34.66	18.80	3.2ML	041.00	43.00	-056.00	Mohamed et al. (2015)
35	20080302	170600.00	28.76	34.79	13.70	3.2ML	058.00	75.00	-029.00	Mohamed et al. (2015)
36	20080404	140500.00	28.78	34.75	06.90	3.7ML	145.00	46.00	-067.00	Mohamed et al. (2015)
37	20111021	123700.00	28.52	34.73	09.00	3.7ML	148.00	49.00	-147.00	Abdel-Aal & Badreldin (2016)
38	20130610	084400.00	28.06	34.63	06.10	3.9ML	142.00	73.00	-015.00	Abdel-Aal & Badreldin (2016)
39	20150627	053404.00	29.04	34.67	22.00	5.6Mw	200.00	82.00	002.00	Harvard CMT
40	20160516	014200.00	28.47	34.72	07.35	4.3ML	157.00	52.00	-173.00	Ali & Badreldin (2019)
41	20160516	004559.00	28.45	34.51	18.00	5.2Mw	019.00	88.00	-003.00	ISC
42	20160813	030600.00	28.49	34.82	19.10	3.9ML	332.00	47.00	-153.00	Ali & Badreldin (2019)
43	20161129	000113.00	28.56	34.59	18.00	4.7Mw	188.00	59.00	-044.00	ISC
44	20170519	141600.00	27.94	34.56	03.55	4.1ML	304.00	50.00	-027.00	Ali & Badreldin (2019)

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The rate of Seismic deformation in the Gulf of Aqaba as inferred from moment tensor summation

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