{"id":785,"date":"2010-12-25T11:43:02","date_gmt":"2010-12-25T11:43:02","guid":{"rendered":"http:\/\/www.iiees.ac.ir\/en\/?p=785"},"modified":"2010-12-25T11:43:02","modified_gmt":"2010-12-25T11:43:02","slug":"earthquake-report-april-6-2009-central-italy","status":"publish","type":"post","link":"http:\/\/old.iiees.ac.ir\/en\/earthquake-report-april-6-2009-central-italy\/","title":{"rendered":"Earthquake Report: April 6, 2009, central Italy"},"content":{"rendered":"
Earthquake Report: April 6, 2009, central Italy<\/strong><\/div>\n

\u00a0<\/p>\n

Mobayen p., Ashari A., Eslami A.<\/p>\n

1-Felt Reports<\/strong><\/p>\n

\n

At 3:32 local time, an earthquake of Mw= 6.3 magnitude shock Aquila city, located at the northeast of Rome and in the center of Italy, Figure 1. According to the information centers, almost 300 people were killed, 1,000 injured and 10,000 buildings damaged or collapsed there. This earthquake was felt in a wide range of central Italy.<\/p>\n

\"italy_880117_1\"<\/p>\n

Figure 1: Epicenter of the Earthquake, 6\/4\/09, Aquila, Italy (www.emsc-csem.org).<\/p>\n

This event is recorded by Iranian National Broad band Seismic Network (INSN) of IIEES, shown in figure 2. The distance between IIEES stations and the epicenter of this earthquake is almost 3000 km. Therefore, the recorded waveforms can be used effectively in studying the crustal structure and upper mantle, under the stations located in Iran, as well as the characteristics of seismic wave propagation. The three components of waveform data are found in www.iiees.ac.ir.<\/p>\n

\"italy_880117_2\"<\/p>\n

Figure 2: The vertical components, recorded by INSN at 18 stations<\/p>\n

Many aftershocks accrued after the main shock in Aquila area, the most important of which are listed in Table1.<\/p>\n

Table1: Aftershocks of Italy Earthquake (www.emsc-csem.org<\/a>).<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
No<\/strong><\/td>\nDate & Time \u00a0(UTC)<\/strong><\/td>\nLatitude<\/strong><\/td>\nLongitude<\/strong><\/td>\nDepth<\/strong> <\/p>\n

km<\/strong><\/p>\n<\/td>\n

Mag<\/strong><\/td>\nRegion name<\/strong><\/td>\n<\/tr>\n
1<\/td>\n 2009-04-11\u00a0\u00a0\u00a005:39:01.0<\/a><\/td>\n42.39<\/td>\nN<\/td>\n13.38<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
2<\/td>\n 2009-04-11\u00a0\u00a0\u00a003:14:30.0<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.38<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n2.9<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
3<\/td>\n 2009-04-10\u00a0\u00a0\u00a019:07:21.0<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.39<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
4<\/td>\n 2009-04-10\u00a0\u00a0\u00a015:46:18.6<\/a><\/td>\n42.35<\/td>\nN<\/td>\n13.36<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
5<\/td>\n 2009-04-10\u00a0\u00a0\u00a015:22:43.0<\/a><\/td>\n42.25<\/td>\nN<\/td>\n13.48<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
6<\/td>\n 2009-04-10\u00a0\u00a0\u00a011:53:09.0<\/a><\/td>\n42.24<\/td>\nN<\/td>\n13.48<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
7<\/td>\n 2009-04-10\u00a0\u00a0\u00a006:41:31.0<\/a><\/td>\n42.52<\/td>\nN<\/td>\n13.34<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
8<\/td>\n 2009-04-10\u00a0\u00a0\u00a004:33:04.0<\/a><\/td>\n42.46<\/td>\nN<\/td>\n13.35<\/td>\nE<\/td>\n11<\/td>\nML<\/td>\n3.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
9<\/td>\n 2009-04-10\u00a0\u00a0\u00a003:22:23.6<\/a><\/td>\n42.49<\/td>\nN<\/td>\n13.42<\/td>\nE<\/td>\n2<\/td>\nmb<\/td>\n4.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
10<\/td>\n 2009-04-09\u00a0\u00a0\u00a022:40:07.0<\/a><\/td>\n42.49<\/td>\nN<\/td>\n13.26<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.9<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
11<\/td>\n 2009-04-09\u00a0\u00a0\u00a020:47:01.8<\/a><\/td>\n42.50<\/td>\nN<\/td>\n13.26<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
12<\/td>\n 2009-04-09\u00a0\u00a0\u00a019:38:17.4<\/a><\/td>\n42.52<\/td>\nN<\/td>\n13.35<\/td>\nE<\/td>\n2<\/td>\nMw<\/td>\n5.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
15<\/td>\n 2009-04-09\u00a0\u00a0\u00a015:18:14.0<\/a><\/td>\n42.31<\/td>\nN<\/td>\n13.49<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
16<\/td>\n 2009-04-09\u00a0\u00a0\u00a013:19:35.8<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.23<\/td>\nE<\/td>\n40<\/td>\nML<\/td>\n4.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
17<\/td>\n 2009-04-09\u00a0\u00a0\u00a013:19:35.5<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.22<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.9<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
18<\/td>\n 2009-04-09\u00a0\u00a0\u00a013:00:29.0<\/a><\/td>\n42.30<\/td>\nN<\/td>\n13.47<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
19<\/td>\n 2009-04-09\u00a0\u00a0\u00a009:31:06.0<\/a><\/td>\n42.36<\/td>\nN<\/td>\n13.39<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
20<\/td>\n 2009-04-09\u00a0\u00a0\u00a004:43:12.3<\/a><\/td>\n42.52<\/td>\nN<\/td>\n13.34<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n4.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
21<\/td>\n 2009-04-09\u00a0\u00a0\u00a004:32:46.0<\/a><\/td>\n42.45<\/td>\nN<\/td>\n13.39<\/td>\nE<\/td>\n2<\/td>\nmb<\/td>\n4.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
22<\/td>\n 2009-04-09\u00a0\u00a0\u00a004:29:45.0<\/a><\/td>\n42.50<\/td>\nN<\/td>\n13.35<\/td>\nE<\/td>\n11<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
23<\/td>\n 2009-04-09\u00a0\u00a0\u00a003:41:55.0<\/a><\/td>\n42.51<\/td>\nN<\/td>\n13.33<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
24<\/td>\n 2009-04-09\u00a0\u00a0\u00a003:14:52.7<\/a><\/td>\n42.35<\/td>\nN<\/td>\n13.46<\/td>\nE<\/td>\n2<\/td>\nmb<\/td>\n4.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
25<\/td>\n 2009-04-09\u00a0\u00a0\u00a000:53:00.6<\/a><\/td>\n42.53<\/td>\nN<\/td>\n13.39<\/td>\nE<\/td>\n2<\/td>\nMw<\/td>\n5.4<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
26<\/td>\n 2009-04-08\u00a0\u00a0\u00a023:18:07.5<\/a><\/td>\n42.40<\/td>\nN<\/td>\n13.27<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
27<\/td>\n 2009-04-08\u00a0\u00a0\u00a022:56:51.0<\/a><\/td>\n42.55<\/td>\nN<\/td>\n13.34<\/td>\nE<\/td>\n2<\/td>\nMw<\/td>\n4.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
28<\/td>\n 2009-04-08\u00a0\u00a0\u00a017:58:35.0<\/a><\/td>\n42.36<\/td>\nN<\/td>\n13.40<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
29<\/td>\n 2009-04-08\u00a0\u00a0\u00a011:35:57.0<\/a><\/td>\n42.35<\/td>\nN<\/td>\n13.33<\/td>\nE<\/td>\n11<\/td>\nML<\/td>\n3.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
30<\/td>\n 2009-04-08\u00a0\u00a0\u00a010:34:09.0<\/a><\/td>\n42.35<\/td>\nN<\/td>\n13.38<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
31<\/td>\n 2009-04-08\u00a0\u00a0\u00a004:27:42.5<\/a><\/td>\n42.30<\/td>\nN<\/td>\n13.43<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n4.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
32<\/td>\n 2009-04-08\u00a0\u00a0\u00a003:00:35.2<\/a><\/td>\n42.27<\/td>\nN<\/td>\n13.42<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.7<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
33<\/td>\n 2009-04-07\u00a0\u00a0\u00a022:43:42.0<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.49<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
34<\/td>\n 2009-04-07\u00a0\u00a0\u00a022:29:50.0<\/a><\/td>\n42.28<\/td>\nN<\/td>\n13.49<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
35<\/td>\n 2009-04-07\u00a0\u00a0\u00a021:39:08.3<\/a><\/td>\n42.36<\/td>\nN<\/td>\n13.29<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.7<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
36<\/td>\n 2009-04-07\u00a0\u00a0\u00a021:34:30.9<\/a><\/td>\n42.34<\/td>\nN<\/td>\n13.37<\/td>\nE<\/td>\n2<\/td>\nmb<\/td>\n4.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
38<\/td>\n 2009-04-07\u00a0\u00a0\u00a017:47:38.3<\/a><\/td>\n42.30<\/td>\nN<\/td>\n13.40<\/td>\nE<\/td>\n13<\/td>\nMw<\/td>\n5.6<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
39<\/td>\n 2009-04-07\u00a0\u00a0\u00a010:29:10.0<\/a><\/td>\n42.32<\/td>\nN<\/td>\n13.40<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
40<\/td>\n 2009-04-07\u00a0\u00a0\u00a009:30:56.0<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.36<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
41<\/td>\n 2009-04-07\u00a0\u00a0\u00a009:26:30.7<\/a><\/td>\n42.31<\/td>\nN<\/td>\n13.35<\/td>\nE<\/td>\n10<\/td>\nMw<\/td>\n5.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
42<\/td>\n 2009-04-07\u00a0\u00a0\u00a008:00:53.3<\/a><\/td>\n42.39<\/td>\nN<\/td>\n13.35<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
43<\/td>\n 2009-04-07\u00a0\u00a0\u00a006:15:07.0<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.32<\/td>\nE<\/td>\n11<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
44<\/td>\n 2009-04-06\u00a0\u00a0\u00a023:15:37.7<\/a><\/td>\n42.48<\/td>\nN<\/td>\n13.41<\/td>\nE<\/td>\n2<\/td>\nMw<\/td>\n5.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
45<\/td>\n 2009-04-06\u00a0\u00a0\u00a022:47:15.2<\/a><\/td>\n42.34<\/td>\nN<\/td>\n13.23<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.7<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
46<\/td>\n 2009-04-06\u00a0\u00a0\u00a021:56:55.0<\/a><\/td>\n42.39<\/td>\nN<\/td>\n13.30<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.9<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
47<\/td>\n 2009-04-06\u00a0\u00a0\u00a020:03:35.8<\/a><\/td>\n42.23<\/td>\nN<\/td>\n13.43<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
48<\/td>\n 2009-04-06\u00a0\u00a0\u00a020:03:35.8<\/a><\/td>\n42.23<\/td>\nN<\/td>\n13.43<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
49<\/td>\n 2009-04-06\u00a0\u00a0\u00a016:38:10.7<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.32<\/td>\nE<\/td>\n2<\/td>\nMw<\/td>\n4.4<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
50<\/td>\n 2009-04-06\u00a0\u00a0\u00a013:14:04.0<\/a><\/td>\n42.24<\/td>\nN<\/td>\n13.49<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
51<\/td>\n 2009-04-06\u00a0\u00a0\u00a010:36:18.0<\/a><\/td>\n42.34<\/td>\nN<\/td>\n13.40<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
52<\/td>\n 2009-04-06\u00a0\u00a0\u00a010:12:36.6<\/a><\/td>\n42.31<\/td>\nN<\/td>\n13.32<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
53<\/td>\n 2009-04-06\u00a0\u00a0\u00a009:59:29.0<\/a><\/td>\n42.32<\/td>\nN<\/td>\n13.38<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
54<\/td>\n 2009-04-06\u00a0\u00a0\u00a007:17:16.1<\/a><\/td>\n42.47<\/td>\nN<\/td>\n13.40<\/td>\nE<\/td>\n30<\/td>\nmb<\/td>\n4.4<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
55<\/td>\n 2009-04-06\u00a0\u00a0\u00a006:48:15.0<\/a><\/td>\n42.30<\/td>\nN<\/td>\n13.38<\/td>\nE<\/td>\n8<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
56<\/td>\n 2009-04-06\u00a0\u00a0\u00a005:15:28.0<\/a><\/td>\n42.48<\/td>\nN<\/td>\n13.36<\/td>\nE<\/td>\n4<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
57<\/td>\n 2009-04-06\u00a0\u00a0\u00a004:47:54.9<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.29<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.9<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
58<\/td>\n 2009-04-06\u00a0\u00a0\u00a004:16:40.0<\/a><\/td>\n42.39<\/td>\nN<\/td>\n13.32<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
59<\/td>\n 2009-04-06\u00a0\u00a0\u00a004:08:45.0<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.36<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
60<\/td>\n 2009-04-06\u00a0\u00a0\u00a003:56:48.1<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.34<\/td>\nE<\/td>\n10<\/td>\nmb<\/td>\n4.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
61<\/td>\n 2009-04-06\u00a0\u00a0\u00a003:43:16.0<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.37<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
63<\/td>\n 2009-04-06\u00a0\u00a0\u00a003:30:59.0<\/a><\/td>\n42.34<\/td>\nN<\/td>\n13.39<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n2.8<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
64<\/td>\n 2009-04-06\u00a0\u00a0\u00a003:23:10.0<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.33<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n2.8<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
65<\/td>\n 2009-04-06\u00a0\u00a0\u00a003:17:04.0<\/a><\/td>\n42.37<\/td>\nN<\/td>\n13.37<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
66<\/td>\n 2009-04-06\u00a0\u00a0\u00a002:44:32.0<\/a><\/td>\n42.30<\/td>\nN<\/td>\n13.35<\/td>\nE<\/td>\n10<\/td>\nML<\/td>\n3.2<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
67<\/td>\n 2009-04-06\u00a0\u00a0\u00a002:37:05.3<\/a><\/td>\n42.41<\/td>\nN<\/td>\n13.32<\/td>\nE<\/td>\n2<\/td>\nMw<\/td>\n5.1<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
68<\/td>\n 2009-04-06\u00a0\u00a0\u00a002:31:33.0<\/a><\/td>\n42.41<\/td>\nN<\/td>\n13.39<\/td>\nE<\/td>\n8<\/td>\nML<\/td>\n3.4<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
69<\/td>\n 2009-04-06\u00a0\u00a0\u00a002:27:48.2<\/a><\/td>\n42.37<\/td>\nN<\/td>\n13.23<\/td>\nE<\/td>\n2<\/td>\nmb<\/td>\n4.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
70<\/td>\n 2009-04-06\u00a0\u00a0\u00a002:25:45.0<\/a><\/td>\n42.43<\/td>\nN<\/td>\n13.36<\/td>\nE<\/td>\n13<\/td>\nML<\/td>\n3.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
71<\/td>\n 2009-04-06\u00a0\u00a0\u00a002:14:10.0<\/a><\/td>\n42.32<\/td>\nN<\/td>\n13.46<\/td>\nE<\/td>\n5<\/td>\nML<\/td>\n3.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
72<\/td>\n 2009-04-06\u00a0\u00a0\u00a001:32:41.4<\/a><\/td>\n42.38<\/td>\nN<\/td>\n13.32<\/td>\nE<\/td>\n2<\/td>\nMw<\/td>\n6.3<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
73<\/td>\n 2009-04-05\u00a0\u00a0\u00a022:39:42.8<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.34<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n3.5<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
75<\/td>\n 2009-04-05\u00a0\u00a0\u00a020:48:56.4<\/a><\/td>\n42.36<\/td>\nN<\/td>\n13.37<\/td>\nE<\/td>\n2<\/td>\nML<\/td>\n4.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n
77<\/td>\n 2009-04-03\u00a0\u00a0\u00a004:44:42.0<\/a><\/td>\n42.33<\/td>\nN<\/td>\n13.36<\/td>\nE<\/td>\n9<\/td>\nML<\/td>\n3.0<\/td>\nCENTRAL ITALY<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/blockquote>\n

<\/p>\n

2- Seismic History<\/strong><\/p>\n

\n

Italy is one of the most seismically active countries in Europe (Figure 3). The Alps in the north of Italy are the result of African tectonic plate movement towards North into the Eurasian plate, a process that continues at a pace of 3cm a year.<\/p>\n

\"italy_880117_15\"<\/p>\n

Figure 3: Seismicity of Italy, 1990-2006 (adapted from USGS)<\/p>\n

The movement of Adriatic Sea microplate beneath the country’s east coast seems to have contributed the happening of this earthquake.
“On the basis of past seismicity in this area, the possibility of a further event of similar magnitude cannot be ruled out,” said Roger Musson, a seismologist at the British Geological Survey.
Minor tremors are occurred frequently in Italy but experiencing such destructive earthquakes is unusual there.
In 2002, more than 25 people were killed because of the quake in the southern town of San Giuliano di Puglia which was the highest number of Italian earthquake casualty in more than 20 years. In this earthquake more than 40,000 people lost their houses.
In 1980, more than 2,700 people were killed and several thousands were injured because of the earthquake of about 6.9 magnitude. Its epicenter was at Eboli, about 50 miles in the south of Naples.
One of most destructive earthquakes happened a century ago in 1908, killed as many as 100,000 people in the Sicilian town of Messina in.Italy.<\/p>\n<\/blockquote>\n

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3- Tectonic Summary<\/strong><\/p>\n

\n

The earthquake, 6th April 2009, occurred in Central Italy as a result of normal faulting on a NW-SE oriented structure in the central Apennines, a mountain belt that runs from the Gulf of Taranto in the south to southern edge of Po basin in the northern Italy. The Apennine fold-and-Thrust belt of mainland Italy is an Africa-Verging mountain chain belonging to the pri-Adriatic orogenic system. The overall structure of this belt is the result of convergence between African and Eurasian plates since late cretaceous.
The late collision between orogenic segments of the system (i.e. Tyrrhenia and Adria) is responsible for the emplacement of Apenninie units during Miocene to Pleistocene times.
In the Late Miocene to early Pleistocene, the Apennines were affected by extension in the axial zone of the belt. This extension probably was resulted by the contraction occurring at that time on the foreland side of orogen.
The evolution of this system has caused the expression of all different tectonic styles acting at the same time in a broad region surrounding Italy and the central Mediterranean.
The April 6th, 2009 earthquake, related to the normal faulting and east-west extensional tectonics dominating the entire Apennine belt, is primarily a response to the Tyrrhenian basin opening faster than the compression between Eurasian and African plates.<\/p>\n<\/blockquote>\n

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4- References:<\/strong><\/p>\n

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    \n
  • The Adria Microplate: GPS Geodesy, Tectonics and Hazards., By Nicholas Pinter, Grenerczy Gyula, John Weber, Seth Stein, Damir Medak, Published by Springer, 2006, ISBN 1402042345, 9781402042348, 413 pages<\/li>\n
  • http:\/\/www.guardian.co.uk\/science\/blog\/2009\/apr\/06\/natural-disasters-geology<\/a><\/li>\n
  • http:\/\/earthquake.usgs.gov\/eqcenter\/eqinthenews\/2009\/us2009fcaf\/#summary<\/a><\/li>\n<\/ul>\n
    \n

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