Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 11-07-2009 and time 20:29:43 (UTC) in region 2 km SW L'Aquila (AQ)

A magnitude ML 1.8 earthquake occured in region: 2 km SW L'Aquila (AQ), on

  • 11-07-2009 20:29:43 (UTC)
  • 11-07-2009 22:29:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3380, 13.3920 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
L'Aquila AQ 2 69753 69753
Lucoli AQ 7 1011 70764
Ocre AQ 9 1167 71931
Tornimparte AQ 9 3187 75118
Fossa AQ 9 721 75839
Scoppito AQ 12 3727 79566
Sant'Eusanio Forconese AQ 12 394 79960
Poggio Picenze AQ 13 1136 81096
Pizzoli AQ 14 4326 85422
Rocca di Cambio AQ 14 533 85955
Villa Sant'Angelo AQ 14 424 86379
San Demetrio ne' Vestini AQ 15 1854 88233
Barete AQ 16 737 88970
Barisciano AQ 17 1828 90798
Fagnano Alto AQ 18 418 91216
Rocca di Mezzo AQ 18 1526 92742
Prata d'Ansidonia AQ 19 496 93238
Cagnano Amiterno AQ 19 1369 94607

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km SW of L'Aquila (69753 inhabitants)
44 Km SW of Teramo (54892 inhabitants)
64 Km W of Chieti (51815 inhabitants)
64 Km NE of Tivoli (56533 inhabitants)
65 Km W of Montesilvano (53738 inhabitants)
66 Km E of Terni (111501 inhabitants)
66 Km NE of Guidonia Montecelio (88673 inhabitants)
69 Km W of Pescara (121014 inhabitants)
88 Km NE of Velletri (53303 inhabitants)
89 Km SE of Foligno (57155 inhabitants)
90 Km NE of Roma (2864731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.8 2009-07-11
20:29:43		 42.338 13.392 10 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 922939
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-07-11 20:29:43 ± 0.06
Latitude 42.3380 ± 0.0036
Longitude 13.3920 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 922939

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 476
Semi-minor axis of confidence ellipse (meter) 292
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 565.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.88673
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 26
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 922939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 17:34:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MURB.HHN. 2009-07-11T20:30:20.43 10.0 undecidable manual Sg 0 0 0
IV.SNTG.SHZ. 2009-07-11T20:30:15.93 10.0 undecidable manual Sg 0 0 0
IV.ASSB.HHE. 2009-07-11T20:30:13.17 0.1 undecidable manual Sg 323 98.4237 0.261 82
IV.FDMO.HHE. 2009-07-11T20:30:09.22 0.1 undecidable manual Sg 342 81.3519 0.856 70
IV.MGAB.HHE. 2009-07-11T20:30:09.93 10.0 undecidable manual Pg 0 0 0
IV.CESI.HHZ. 2009-07-11T20:30:08.76 0.1 undecidable manual Sg 332 84.0492 -0.303 83
IV.CESX.HHZ. 2009-07-11T20:30:06.36 0.1 undecidable manual Sg 295 72.9714 0.241 86
IV.LPEL.HHN. 2009-07-11T20:30:05.11 0.1 undecidable manual Sg 116 72.5718 -0.904 69
IV.MURB.HHN. 2009-07-11T20:30:05.40 10.0 undecidable manual Pg 0 0 0
IV.SNTG.SHZ. 2009-07-11T20:30:02.28 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHZ. 2009-07-11T20:30:02.09 0.6 undecidable manual Sg 130 55.5 0.631 40
IV.MNS.HHZ. 2009-07-11T20:30:02.58 0.1 undecidable manual Sg 275 58.497 0.32 87
IV.NRCA.SHZ. 2009-07-11T20:30:02.56 0.1 undecidable manual Sg 338 59.496 0.046 92
IV.CERT.HHZ. 2009-07-11T20:30:01.07 1.0 undecidable manual Sg 218 54.8007 -0.185 23
IV.VVLD.HHZ. 2009-07-11T20:30:01.31 0.1 undecidable manual Sg 160 55.3002 -0.087 92
IV.ASSB.HHE. 2009-07-11T20:30:01.00 0.1 undecidable manual Pg 323 98.4237 0.311 81
IV.GIUL.HHE. 2009-07-11T20:29:59.10 0.1 undecidable manual Pg 188 87.246 0.141 86
IV.CESI.HHZ. 2009-07-11T20:29:58.48 0.1 undecidable manual Pg 332 84.0492 0.011 89
IV.SDI.SHZ. 2009-07-11T20:29:57.68 0.1 undecidable manual Pg 154 77.7666 0.183 87
IV.VCEL.EHZ. 2009-07-11T20:29:57.41 0.1 undecidable manual Sg 80 37.3293 0.815 77
IV.FDMO.HHE. 2009-07-11T20:29:57.88 0.1 undecidable manual Pg 342 81.3519 -0.18 86
IV.LNSS.HHN. 2009-07-11T20:29:57.22 0.1 undecidable manual Sg 316 41.1255 -0.401 88
IV.CESX.HHZ. 2009-07-11T20:29:57.63 0.1 undecidable manual Pg 295 72.9714 0.865 70
IV.LPEL.HHN. 2009-07-11T20:29:56.69 0.1 undecidable manual Pg 116 72.5718 -0.019 90
IV.SAN2.EHZ. 2009-07-11T20:29:55.86 0.6 undecidable manual Sg 345 33.744 0.227 46
IV.PTQR.SHZ. 2009-07-11T20:29:55.73 0.1 undecidable manual Sg 179 35.0427 -0.265 92
IV.MTCE.HHZ. 2009-07-11T20:29:55.03 0.1 undecidable manual Pg 237 63.7917 -0.326 86
IV.TERO.HHZ. 2009-07-11T20:29:55.54 0.3 undecidable manual Sg 29 36.0417 -0.721 60
IV.OFFI.HHN. 2009-07-11T20:29:55.70 0.1 undecidable manual Pg 20 70.4739 -0.673 77
IV.NRCA.SHZ. 2009-07-11T20:29:54.42 0.1 undecidable manual Pg 338 59.496 -0.266 88
IV.VVLD.HHZ. 2009-07-11T20:29:54.47 0.1 undecidable manual Pg 160 55.3002 0.426 86
IV.INTR.HHZ. 2009-07-11T20:29:54.07 0.1 undecidable manual Pg 130 55.5 -0.009 93
IV.GUAR.HHE. 2009-07-11T20:29:54.92 0.1 undecidable manual Pg 186 60.5949 0.059 92
IV.MNS.HHZ. 2009-07-11T20:29:54.34 0.1 undecidable manual Pg 275 58.497 -0.195 90
IV.CERT.HHZ. 2009-07-11T20:29:53.72 0.1 undecidable manual Pg 218 54.8007 -0.24 89
IV.LNSS.HHN. 2009-07-11T20:29:52.06 0.1 undecidable manual Pg 316 41.1255 0.202 92
IV.FIAM.HHZ. 2009-07-11T20:29:52.83 0.1 undecidable manual Sg 251 23.8539 -0.17 96
IV.FAGN.HHZ. 2009-07-11T20:29:51.52 0.6 undecidable manual Sg 117 17.6712 0.454 46
IV.T0107.HLZ. 2009-07-11T20:29:51.29 0.1 undecidable manual Sg 322 19.0698 -0.215 96
IV.VCEL.EHZ. 2009-07-11T20:29:51.23 0.1 undecidable manual Pg 80 37.3293 -0.04 96
IV.TERO.HHZ. 2009-07-11T20:29:50.59 0.1 undecidable manual Pg 29 36.0417 -0.481 88
IV.SAN2.EHZ. 2009-07-11T20:29:50.66 0.1 undecidable manual Pg 345 33.744 -0.056 96
IV.PTQR.SHZ. 2009-07-11T20:29:50.75 0.1 undecidable manual Pg 179 35.0427 -0.17 94
IV.FIAM.HHZ. 2009-07-11T20:29:49.10 0.1 undecidable manual Pg 251 23.8539 -0.09 97
IV.FAGN.HHZ. 2009-07-11T20:29:48.27 0.1 undecidable manual Pg 117 17.6712 0.195 96
IV.T0107.HLZ. 2009-07-11T20:29:48.49 0.1 undecidable manual Pg 322 19.0698 0.163 97
IV.T0105.HLZ. 2009-07-11T20:29:48.10 0.1 undecidable manual Sg 117 6.4935 -0.103 100
MN.AQU.HHZ. 2009-07-11T20:29:47.45 0.1 undecidable manual Sg 24 1.998 -0.155 100
IV.T0104.EHZ. 2009-07-11T20:29:47.82 0.1 undecidable manual Sg 299 5.0949 -0.133 100
IV.T0105.HLZ. 2009-07-11T20:29:46.63 0.1 undecidable manual Pg 117 6.4935 0.209 98
MN.AQU.HHZ. 2009-07-11T20:29:46.27 0.1 undecidable manual Pg 24 1.998 0.194 99
IV.T0104.EHZ. 2009-07-11T20:29:46.49 0.1 undecidable manual Pg 299 5.0949 0.213 98
IV.ORI.HHN. 2009-07-11T20:29:45.81 10.0 undecidable manual Pg 0 0 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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