Preliminary Earthquake Report-Kahak, Southern Qom, ML=5.6 (2007-06-18)

An earthquake with a magnitude of (ML=5.6) occurred about 12 kilometers south of Qom near the faults trends with a northwest-southeast bearing at 17:59:50 local time on Monday, June 18, 2007. According to the recorded seismograms of the IIEES Iranian National Seismic Network (INSN), the epicenter of the earthquake was located at 34.52º N and 50.86º E.

The earthquake was perceptible in Qom, Tehran, Isfahan, Markazi, Semnan, Yazd, Qazvin and Mazandaran provinces. The shaking was obviously perceived in northern Tehran especially in the upper floors of the buildings. The event was recorded by 15 INSN stations. The preliminary estimated depth of the earthquake is 17 kilometers.

More than 10 aftershocks are recorded with maximum magnitude of ML=3.3 by 19:20. The highest intensity of the earthquake has been reported in Kahak region of Qom province as of this writing.

The seismicity history of the region (Table 1), map of epicentral region (Fig. 1), the waveforms recorded by INSN (Fig. 2), the seismicity map of the region (Fig. 3) are presented underneath:

Figure 1: Map of epicentral region

Figure 2: The waveforms recorded by INSN

Table 1: The seismicity history of the region

Date(yyyy/mm/dd)	Time(UTC)	Latitude	Longitude	Depth	Magnitude	Reference
1958/01/16	02:04:16.0	34	50		Mb:4.7	BCIS
1968/04/26	02:58:22.1	35.10	50.20	21	Mb:5.3	USCGS
1970/06/27	07:57:53.3	35.20	50.70	14	Mb:4.9	USCGS
1971/03/31	21:50:10.3	34.60	50.30	31	Mb:4.4	USCGS
1971/04/30	09:06:16.5	34.60	50.30	42	Mb:4.7	USCGS
1980/12/19	01:16:56.0	34.5870	50.6520	33	Ms:5.8	USCGS
1980/12/22	12:51:21.0	34.5030	50.59	41	Mb:5.5	USCGS
1981/03/29	17:20:49.5	34.7660	50.7450	21	Mb:4.2	USCGS
1982/07/05	15:54:24.5	34.63	51.02	33	Mb:4.4	USCGS
1985/02/11	09:26:45.9	34.56	50.6770	51	Mb:4.7	USCGS
1988/03/01	01:02:02.9	34.4860	50.8180	15	Mb:4.3	USCGS
1988/03/30	22:30:18.1	34.90	50.46	33	Mb:3.9	USCGS
1990/01/01	18:36:21.9	35.12	50.72	10		USCGS
1990/01/23	19:42:37.9	35.2980	50.7440	5		USCGS
1990/04/22	01:34:06.8	34.49	51.34	10		USCGS
1990/04/23	05:44:52.7	35.2530	51.0590	10		USCGS
2000/04/10	00:04:41.60	34.60	51.43	10	ML:2.9	IIEES
2000/04/10	03:14:15.20	34.77	50.46	10	ML:2.7	IIEES
2000/05/12	22:29:05.40	34.23	51.79	10	Mb:3.3	IIEES
2001/07/24	20:45:43.3	34.44	51.10	13	ML:3.7	IIEES
2001/08/12	20:04:57.3	34.37	50.88	15	ML:3.2	IIEES
2001/11/23	19:30:50.2	34.30	49.97	33	ML:3.8	IIEES
2003/09/04	07:56:01.6	35.22	51.42	15	Mb:3.3	IIEES
2003/12/24	03:49:59.8	34.91	50.72	15	ML:4.5	IIEES
2004/06/04	00:23:16.6	34.86	50.65	15	ML:2.3	IIEES
2004/06/07	16:57:00.3	34.30	49.90	8	ML:3.1	IIEES
2004/06/07	17:58:25.2	34.24	49.89	4	ML:3.4	IIEES
2004/06/18	17:17:26.5	34.84	50.54	15	ML:2	IIEES
2004/07/07	09:06:54.4	34.28	51.43	15	ML:2.9	IIEES
2004/07/23	00:15:31.5	34.88	50.22	15	ML:2.8	IIEES
2004/10/25	22:20:11.7	34.69	50.52	18	ML:3.8	IIEES
2004/10/29	05:19:36.1	34.73	51.77	10	ML:2.3	IIEES
2004/12/12	13:23:23.0	34.11	51.79	15	ML:2.7	IIEES
2005/01/12	12:27:07.1	34.32	51.20	18	ML:2	IIEES
2005/02/09	17:37:36.4	34.29	51.04	34	ML:2.3	IIEES
2005/03/25	12:48:54.7	35.01	50.05	14	ML:4.3	IIEES
2005/03/30	03:31:02.9	34.92	50.11	14	ML:2.4	IIEES
2005/04/10	17:33:00.8	34.47	51.09	14	ML:3.5	IIEES
2005/05/13	09:56:53.5	35.17	51.57	14	ML:2.8	IIEES
2005/06/18	23:57:05.2	34.66	51.68	18	ML:3.1	IIEES
2005/07/11	00:58:44.4	34.75	50.37	15	ML:3.4	IIEES
2005/07/11	10:42:52.5	34.60	50.48	14	ML:3.7	IIEES
2005/07/11	10:46:43.4	34.70	50.42	14	ML:2.9	IIEES
2005/08/01	10:39:39.4	35.25	51.05	17	ML:2.8	IIEES
2005/11/15	09:37:26.9	34.91	49.94	14	ML:2.9	IIEES
2006/01/03	22:49:14.1	34.90	51.28	15	ML:2.5	IIEES
2006/02/07	05:46:35.8	34.07	51.47	14	ML:2.8	IIEES
2006/02/27	13:31:19.6	34.88	50.14	14	ML:3.5	IIEES
2006/05/02	18:18:57.0	34.51	51.32	14	ML:2.5	IIEES
2006/05/28	02:12:13.2	35.37	50.99	15	ML:3.4	IIEES
2006/07/24	21:26:43.5	35.28	50.47	28	ML:2.7	IIEES
2006/11/06	15:13:18.5	34.61	50.64	14	ML:2.9	IIEES
2007/01/16	21:30:46.5	34.67	51.38	17	ML:2.5	IIEES
2007/01/19	10:22:28.1	34.53	51.81	18	ML:2.6	IIEES
2007/05/09	17:13:36.3	34.93	49.96	14	ML:2.2	IIEES
2007/05/19	01:21:29.2	34.50	51.36	6	ML:1.2	IIEES
2007/06/18	14:29:49.5	34.53	50.84	17	ML:5.7	IIEES
2007/06/18	14:51:51.8	34.55	50.82	18	ML:3.3	IIEES

 

Figure 3: The seismicity map of the region