Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 07-04-2009 and time 02:47:06 (Italy) in region 4 km W L'Aquila (AQ)

A magnitude ML 1.9 earthquake occured in region: 4 km W L'Aquila (AQ), on

  • 07-04-2009 00:47:06 (UTC)
  • 07-04-2009 02:47:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3520, 13.3480 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 4 69753 69753
Lucoli AQ 7 1011 70764
Tornimparte AQ 8 3187 73951
Scoppito AQ 8 3727 77678
Pizzoli AQ 10 4326 82004
Barete AQ 12 737 82741
Ocre AQ 13 1167 83908
Fossa AQ 13 721 84629
Cagnano Amiterno AQ 16 1369 85998
Sant'Eusanio Forconese AQ 16 394 86392
Poggio Picenze AQ 16 1136 87528
Rocca di Cambio AQ 17 533 88061
Villa Sant'Angelo AQ 18 424 88485
San Demetrio ne' Vestini AQ 19 1854 90339
Capitignano AQ 19 665 91004
Borgorose RI 20 4591 95595

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km W of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
62 Km E of Terni (111501 inhabitants)
63 Km NE of Tivoli (56533 inhabitants)
64 Km NE of Guidonia Montecelio (88673 inhabitants)
67 Km W of Chieti (51815 inhabitants)
68 Km W of Montesilvano (53738 inhabitants)
72 Km W of Pescara (121014 inhabitants)
85 Km SE of Foligno (57155 inhabitants)
88 Km NE of Velletri (53303 inhabitants)
88 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 1.9 2009-04-07
00:47:06		 42.352 13.348 10 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 764509
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-07 00:47:06 ± 0.07
Latitude 42.3520 ± 0.0045
Longitude 13.3480 ± 0.0061
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 764509

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 506
Semi-minor axis of confidence ellipse (meter) 453
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 123
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) 50
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.85615
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 764509
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:27:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.SHZ. 2009-04-07T00:47:24.90 0.6 undecidable manual Sg 340 56.6988 0.42 43
IV.ASSB.HHN. 2009-04-07T00:47:22.99 0.6 undecidable manual Pg 324 95.0382 0.117 43
IV.CESI.HHN. 2009-04-07T00:47:20.88 0.3 undecidable manual Pg 334 80.9523 0.173 65
IV.FDMO.HHE. 2009-04-07T00:47:20.45 0.3 undecidable manual Pg 344 78.8655 0.067 67
IV.VCEL.EHZ. 2009-04-07T00:47:20.45 0.3 undecidable manual Sg 83 40.626 0.258 69
IV.TERO.HHE. 2009-04-07T00:47:19.19 0.3 undecidable manual Sg 35 36.6411 0.076 72
IV.PTQR.SHZ. 2009-04-07T00:47:19.10 0.3 undecidable manual Sg 173 36.8298 -0.083 72
IV.MNS.HHZ. 2009-04-07T00:47:17.43 0.3 undecidable manual Pg 274 54.8007 0.756 58
IV.VVLD.HHN. 2009-04-07T00:47:16.92 0.3 undecidable manual Pg 157 58.0974 -0.268 67
IV.CERT.HHZ. 2009-04-07T00:47:16.30 0.6 undecidable manual Pg 214 53.9016 -0.239 45
IV.NRCA.SHZ. 2009-04-07T00:47:16.53 0.3 undecidable manual Pg 340 56.6988 -0.443 65
IV.FAGN.HHN. 2009-04-07T00:47:15.13 0.3 undecidable manual Sg 116 21.5673 0.105 74
IV.VCEL.EHZ. 2009-04-07T00:47:14.81 0.6 undecidable manual Pg 83 40.626 0.313 46
.CAMP.---. 2009-04-07T00:47:14.83 0.6 undecidable manual Sg 14 20.9679 -0.007 50
IV.FIAM.HHE. 2009-04-07T00:47:14.76 0.3 undecidable manual Sg 244 21.0678 -0.11 74
IV.TERO.HHE. 2009-04-07T00:47:13.19 0.1 undecidable manual Pg 35 36.6411 -0.685 82
IV.PTQR.SHZ. 2009-04-07T00:47:13.78 0.3 undecidable manual Pg 173 36.8298 -0.135 72
IV.FIAM.HHE. 2009-04-07T00:47:11.47 0.1 undecidable manual Pg 244 21.0678 0.045 100
IV.FAGN.HHN. 2009-04-07T00:47:11.69 0.3 undecidable manual Pg 116 21.5673 0.176 73
.CAMP.---. 2009-04-07T00:47:11.15 0.1 undecidable manual Pg 14 20.9679 -0.256 96
MN.AQU.HHZ. 2009-04-07T00:47:10.61 0.3 undecidable manual Sg 87 4.3956 -0.012 78
MN.AQU.HHZ. 2009-04-07T00:47:09.15 0.1 undecidable manual Pg 87 4.3956 0.178 100
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