Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 09-04-2009 and time 01:52:16 (Italy) in region 5 km W L'Aquila (AQ)

A magnitude ML 1.3 earthquake occured in region: 5 km W L'Aquila (AQ), on

  • 08-04-2009 23:52:16 (UTC)
  • 09-04-2009 01:52:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3570, 13.3420 at 9 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 5 69753 69753
Scoppito AQ 7 3727 73480
Lucoli AQ 7 1011 74491
Tornimparte AQ 8 3187 77678
Pizzoli AQ 10 4326 82004
Barete AQ 12 737 82741
Ocre AQ 14 1167 83908
Fossa AQ 14 721 84629
Cagnano Amiterno AQ 15 1369 85998
Sant'Eusanio Forconese AQ 17 394 86392
Poggio Picenze AQ 17 1136 87528
Rocca di Cambio AQ 18 533 88061
Capitignano AQ 19 665 88726
Villa Sant'Angelo AQ 19 424 89150
San Demetrio ne' Vestini AQ 19 1854 91004

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km W of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
61 Km E of Terni (111501 inhabitants)
63 Km NE of Tivoli (56533 inhabitants)
64 Km NE of Guidonia Montecelio (88673 inhabitants)
68 Km W of Chieti (51815 inhabitants)
69 Km W of Montesilvano (53738 inhabitants)
73 Km W of Pescara (121014 inhabitants)
85 Km SE of Foligno (57155 inhabitants)
88 Km NE of Roma (2864731 inhabitants)
88 Km NE of Velletri (53303 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 1.9
ML 1.3 		2009-04-08
23:52:16		 42.357 13.342 9 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 776669
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-08 23:52:16 ± 0.09
Latitude 42.3570 ± 0.0054
Longitude 13.3420 ± 0.0085
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 776669

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 644
Semi-minor axis of confidence ellipse (meter) 603
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 922.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.50452
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 776669
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:54

Md:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 776669
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.STR3.BHN. 2009-04-08T23:52:35.25 10.0 undecidable manual Pg 0 0 0
IV.NRCA.SHZ. 2009-04-08T23:52:34.14 0.1 undecidable manual Sg 341 55.9995 -0.161 89
IV.VCEL.EHN. 2009-04-08T23:52:31.32 0.1 undecidable manual Sg 84 41.0256 1.022 68
IV.LNSS.HHN. 2009-04-08T23:52:29.39 0.1 undecidable manual Sg 318 36.8298 0.224 90
IV.PTQR.SHZ. 2009-04-08T23:52:28.90 0.1 undecidable manual Sg 173 37.5291 -0.456 86
IV.MNS.HHE. 2009-04-08T23:52:27.46 0.3 undecidable manual Pg 274 54.3012 0.957 51
IV.NRCA.SHZ. 2009-04-08T23:52:26.60 0.1 undecidable manual Pg 341 55.9995 -0.17 88
IV.CERT.HHN. 2009-04-08T23:52:26.10 0.1 undecidable manual Pg 213 54.1014 -0.377 85
.FAGN.HHE. 2009-04-08T23:52:24.61 0.3 undecidable manual Sg 117 22.2555 -0.236 69
IV.FIAM.HHZ. 2009-04-08T23:52:24.63 0.1 undecidable manual Sg 242 20.9679 0.197 94
IV.VCEL.EHN. 2009-04-08T23:52:24.68 0.1 undecidable manual Pg 84 41.0256 0.22 90
IV.CAMP.HHZ. 2009-04-08T23:52:23.92 0.1 undecidable manual Sg 15 20.5683 -0.383 90
IV.LNSS.HHN. 2009-04-08T23:52:23.48 0.1 undecidable manual Pg 318 36.8298 -0.33 88
IV.PTQR.SHZ. 2009-04-08T23:52:23.62 0.1 undecidable manual Pg 173 37.5291 -0.298 89
.FAGN.HHE. 2009-04-08T23:52:21.17 0.3 undecidable manual Pg 117 22.2555 -0.14 71
IV.FIAM.HHZ. 2009-04-08T23:52:21.26 0.1 undecidable manual Pg 242 20.9679 0.183 94
IV.CAMP.HHZ. 2009-04-08T23:52:20.72 0.1 undecidable manual Pg 15 20.5683 -0.281 92
MN.AQU.HHZ. 2009-04-08T23:52:20.03 0.1 undecidable manual Sg 94 4.8951 -0.086 98
MN.AQU.HHZ. 2009-04-08T23:52:19.02 0.1 undecidable manual Pg 94 4.8951 0.441 91
IV.T0104.EHZ. 2009-04-08T23:52:19.74 0.1 undecidable manual Sg 311 0.4995 0.041 100
IV.T0104.EHZ. 2009-04-08T23:52:18.54 0.1 undecidable manual Pg 311 0.4995 0.198 97
IV.SBPO.HHN. 2009-04-08T23:51:51.90 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