Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.5 on date 09-04-2009 and time 01:26:21 (Italy) in region 4 km SE L'Aquila (AQ)

A magnitude ML 2.5 earthquake occured in region: 4 km SE L'Aquila (AQ), on

  • 08-04-2009 23:26:21 (UTC)
  • 09-04-2009 01:26:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3320, 13.4410 at 11 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 4 69753 69753
Fossa AQ 6 721 70474
Ocre AQ 6 1167 71641
Sant'Eusanio Forconese AQ 8 394 72035
Poggio Picenze AQ 9 1136 73171
Lucoli AQ 10 1011 74182
Villa Sant'Angelo AQ 11 424 74606
San Demetrio ne' Vestini AQ 11 1854 76460
Rocca di Cambio AQ 11 533 76993
Tornimparte AQ 12 3187 80180
Barisciano AQ 12 1828 82008
Fagnano Alto AQ 14 418 82426
Prata d'Ansidonia AQ 15 496 82922
Rocca di Mezzo AQ 15 1526 84448
Scoppito AQ 16 3727 88175
Pizzoli AQ 17 4326 92501
Santo Stefano di Sessanio AQ 17 111 92612
Fontecchio AQ 18 369 92981
San Pio delle Camere AQ 18 661 93642
Barete AQ 19 737 94379

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km SE of L'Aquila (69753 inhabitants)
42 Km SW of Teramo (54892 inhabitants)
60 Km W of Chieti (51815 inhabitants)
62 Km W of Montesilvano (53738 inhabitants)
65 Km W of Pescara (121014 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
69 Km NE of Guidonia Montecelio (88673 inhabitants)
70 Km E of Terni (111501 inhabitants)
90 Km NE of Velletri (53303 inhabitants)
92 Km SE of Foligno (57155 inhabitants)
93 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 		Md 2.8
ML 2.5 		2009-04-08
23:26:21		 42.332 13.441 11 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 776559
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-08 23:26:21 ± 0.06
Latitude 42.3320 ± 0.0045
Longitude 13.4410 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 776559

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 520
Semi-minor axis of confidence ellipse (meter) 414
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 230
Circular confidence region, given by single value of horizontal uncertainty (meter) 707.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 74
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.91371
Number of stations at which the event was observed 61
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.4
Num. used stations
Type of magnitude ML
Reference to an origin 776559
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:47

Md:2.8

Field Value
Value 2.8
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 776559
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SGRT.HHZ. 2009-04-08T23:27:21.00 10.0 undecidable manual Sn 0 0 0
IV.MRLC.HHN. 2009-04-08T23:27:09.59 10.0 undecidable manual Pn 0 0 0
IV.MGAB.HHE. 2009-04-08T23:27:04.67 10.0 undecidable manual Sg 0 0 0
IV.RSM.SHZ. 2009-04-08T23:26:59.38 10.0 undecidable manual Pn 0 0 0
IV.MCRV.HHN. 2009-04-08T23:26:59.08 10.0 undecidable manual Pn 0 0 0
IV.CING.HHN. 2009-04-08T23:26:58.38 10.0 undecidable manual Sg 0 0 0
IV.MSAG.HHZ. 2009-04-08T23:26:58.61 10.0 undecidable manual Pn 0 0 0
IV.SGRT.HHZ. 2009-04-08T23:26:56.25 10.0 undecidable manual Pn 0 0 0
IV.ROM9.HHN. 2009-04-08T23:26:55.88 10.0 undecidable manual Pn 0 0 0
IV.PARC.HHN. 2009-04-08T23:26:55.08 10.0 undecidable manual Pn 0 0 0
IV.LATE.HHN. 2009-04-08T23:26:49.40 10.0 undecidable manual Pn 0 0 0
IV.FSSB.HHZ. 2009-04-08T23:26:49.84 10.0 undecidable manual Pn 0 0 0
IV.PIEI.HHE. 2009-04-08T23:26:49.20 10.0 undecidable manual Pn 0 0 0
IV.TRIV.HHN. 2009-04-08T23:26:49.56 10.0 undecidable manual Pn 0 0 0
IV.AOI.HHN. 2009-04-08T23:26:48.43 10.0 undecidable manual Pn 0 0 0
IV.FG2.SHZ. 2009-04-08T23:26:48.61 10.0 undecidable manual Pn 0 0 0
IV.PTRJ.HHZ. 2009-04-08T23:26:48.56 10.0 undecidable manual Pn 0 0 0
IV.MODR.HHN. 2009-04-08T23:26:47.08 10.0 undecidable manual Pn 0 0 0
IV.BSSO.HHZ. 2009-04-08T23:26:47.65 10.0 undecidable manual Pn 0 0 0
IV.MSC.EHZ. 2009-04-08T23:26:46.83 10.0 undecidable manual Pg 0 0 0
IV.SGG.HHZ. 2009-04-08T23:26:46.36 10.0 undecidable manual Pg 0 0 0
IV.RFI.SHZ. 2009-04-08T23:26:45.15 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHN. 2009-04-08T23:26:45.47 10.0 undecidable manual Pg 0 0 0
IV.ARVD.HHZ. 2009-04-08T23:26:45.43 10.0 undecidable manual Pg 0 0 0
IV.MGAB.HHE. 2009-04-08T23:26:45.52 10.0 undecidable manual Pg 0 0 0
IV.VAGA.HHZ. 2009-04-08T23:26:44.29 10.0 undecidable manual Pg 0 0 0
IV.TOLF.HHZ. 2009-04-08T23:26:44.91 10.0 undecidable manual Pg 0 0 0
IV.CING.HHN. 2009-04-08T23:26:43.41 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHN. 2009-04-08T23:26:40.36 10.0 undecidable manual Pg 0 0 0
IV.SNTG.SHZ. 2009-04-08T23:26:40.88 10.0 undecidable manual Pg 0 0 0
IV.LAV9.SHZ. 2009-04-08T23:26:39.47 10.0 undecidable manual Pg 0 0 0
IV.RNI2.HHN. 2009-04-08T23:26:39.40 10.0 undecidable manual Pg 0 0 0
IV.MA9.HHZ. 2009-04-08T23:26:39.75 10.0 undecidable manual Pg 0 0 0
IV.RDP.BHZ. 2009-04-08T23:26:38.97 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHZ. 2009-04-08T23:26:38.41 0.6 undecidable manual Sg 133 52.1034 0.408 43
IV.ASSB.HHZ. 2009-04-08T23:26:38.92 0.3 undecidable manual Pg 321 101.4207 0.256 61
IV.MIDA.HHZ. 2009-04-08T23:26:38.68 10.0 undecidable manual Pg 0 0 0
IV.CESX.HHE. 2009-04-08T23:26:37.40 10.0 undecidable manual Pg 0 0 0
IV.TRTR.HHZ. 2009-04-08T23:26:37.90 10.0 undecidable manual Pg 0 0 0
IV.CESI.HHN. 2009-04-08T23:26:37.47 10.0 undecidable manual Pg 0 0 0
IV.GIUL.HHE. 2009-04-08T23:26:36.73 0.3 undecidable manual Pg 190 87.246 0.243 62
IV.FDMO.HHZ. 2009-04-08T23:26:35.69 0.3 undecidable manual Pg 340 83.25 -0.187 64
IV.CAFR.HHN. 2009-04-08T23:26:35.24 0.1 undecidable manual Pg 99 75.2691 0.608 77
IV.POFI.HHN. 2009-04-08T23:26:34.06 0.3 undecidable manual Pg 162 71.7726 -0.036 67
IV.OFFI.HHZ. 2009-04-08T23:26:34.88 0.3 undecidable manual Pg 17 69.7746 1.091 47
IV.SDI.SHZ. 2009-04-08T23:26:34.51 0.3 undecidable manual Pg 156 75.4689 -0.159 65
IV.MTCE.HHZ. 2009-04-08T23:26:33.37 0.1 undecidable manual Pg 239 66.9774 0.01 91
IV.VCEL.EHZ. 2009-04-08T23:26:33.93 0.6 undecidable manual Sg 78 33.4443 0.917 37
IV.PTQR.SHZ. 2009-04-08T23:26:33.12 0.6 undecidable manual Sg 186 34.6431 -0.203 46
IV.GUAR.HHN. 2009-04-08T23:26:32.28 0.6 undecidable manual Pg 190 60.5949 -0.097 45
IV.MNS.HHZ. 2009-04-08T23:26:32.75 0.3 undecidable manual Pg 276 62.5929 0.063 68
IV.NRCA.SHZ. 2009-04-08T23:26:32.47 0.3 undecidable manual Pg 334 61.6938 -0.078 68
IV.TERO.HHZ. 2009-04-08T23:26:32.59 0.3 undecidable manual Sg 22 34.8429 -0.798 58
IV.CERT.HHZ. 2009-04-08T23:26:31.66 0.1 undecidable manual Pg 222 56.8986 -0.151 90
IV.FIAM.HHZ. 2009-04-08T23:26:31.43 0.3 undecidable manual Sg 255 27.5502 -0.007 73
IV.INTR.HHZ. 2009-04-08T23:26:30.78 0.1 undecidable manual Pg 133 52.1034 -0.291 88
IV.VVLD.HHZ. 2009-04-08T23:26:30.95 0.3 undecidable manual Pg 164 53.502 -0.325 65
IV.CAMP.HHE. 2009-04-08T23:26:29.88 0.6 undecidable manual Sg 353 22.755 -0.27 47
IV.LNSS.HHE. 2009-04-08T23:26:29.97 0.1 undecidable manual Pg 313 44.5221 0.075 93
IV.TERO.HHZ. 2009-04-08T23:26:28.02 0.1 undecidable manual Pg 22 34.8429 -0.389 89
IV.VCEL.EHZ. 2009-04-08T23:26:28.10 0.1 undecidable manual Pg 78 33.4443 -0.092 95
IV.PTQR.SHZ. 2009-04-08T23:26:28.29 0.1 undecidable manual Pg 186 34.6431 -0.081 95
IV.FAGN.HHZ. 2009-04-08T23:26:27.46 0.3 undecidable manual Sg 122 13.7751 -0.277 71
IV.FIAM.HHZ. 2009-04-08T23:26:27.41 0.1 undecidable manual Pg 255 27.5502 0.123 95
IV.CAMP.HHE. 2009-04-08T23:26:26.56 0.1 undecidable manual Pg 353 22.755 0.02 98
IV.PE9.EHZ. 2009-04-08T23:26:26.67 10.0 undecidable manual Pg 0 0 0
IV.T0104.EHE. 2009-04-08T23:26:26.59 0.3 undecidable manual Sg 290 8.9799 0.056 75
IV.FAGN.HHZ. 2009-04-08T23:26:25.15 0.1 undecidable manual Pg 122 13.7751 0.001 100
MN.AQU.HHZ. 2009-04-08T23:26:25.49 0.1 undecidable manual Sg 307 3.996 -0.179 98
.T0108.HLE. 2009-04-08T23:26:25.70 0.3 undecidable manual Sg 274 5.2947 -0.145 74
MN.AQU.HHZ. 2009-04-08T23:26:24.07 0.1 undecidable manual Pg 307 3.996 0.116 99
.T0108.HLE. 2009-04-08T23:26:24.26 0.1 undecidable manual Pg 274 5.2947 0.201 97
IV.T0104.EHE. 2009-04-08T23:26:24.70 0.1 undecidable manual Pg 290 8.9799 0.248 96
IV.CMPO.HHN. 2009-04-08T23:25:21.38 10.0 undecidable manual Pg 0 0 0
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download