Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 06-04-2009 and time 20:27:57 (Italy) in region 5 km S L'Aquila (AQ)

A magnitude ML 2.3 earthquake occured in region: 5 km S L'Aquila (AQ), on

  • 06-04-2009 18:27:57 (UTC)
  • 06-04-2009 20:27:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3040, 13.4080 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Ocre AQ 6 1167 70920
Lucoli AQ 6 1011 71931
Fossa AQ 7 721 72652
Tornimparte AQ 9 3187 75839
Sant'Eusanio Forconese AQ 10 394 76233
Rocca di Cambio AQ 10 533 76766
Villa Sant'Angelo AQ 11 424 77190
Poggio Picenze AQ 11 1136 78326
San Demetrio ne' Vestini AQ 13 1854 80180
Rocca di Mezzo AQ 14 1526 81706
Scoppito AQ 15 3727 85433
Fagnano Alto AQ 15 418 85851
Barisciano AQ 15 1828 87679
Prata d'Ansidonia AQ 17 496 88175
Pizzoli AQ 17 4326 92501
Fontecchio AQ 18 369 92870
Borgorose RI 19 4591 97461
Barete AQ 19 737 98198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km S of L'Aquila (69753 inhabitants)
47 Km SW of Teramo (54892 inhabitants)
63 Km W of Chieti (51815 inhabitants)
63 Km NE of Tivoli (56533 inhabitants)
65 Km W of Montesilvano (53738 inhabitants)
65 Km NE of Guidonia Montecelio (88673 inhabitants)
69 Km W of Pescara (121014 inhabitants)
69 Km E of Terni (111501 inhabitants)
86 Km NE of Velletri (53303 inhabitants)
89 Km NE of Roma (2864731 inhabitants)
93 Km SE of Foligno (57155 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 2.3
ML 2.3 		2009-04-06
18:27:57		 42.304 13.408 10 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 761939
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-06 18:27:57 ± 0.08
Latitude 42.3040 ± 0.0045
Longitude 13.4080 ± 0.0073
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 761939

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 624
Semi-minor axis of confidence ellipse (meter) 389
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 781.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.76892
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 761939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:24:37

Md:2.3

Field Value
Value 2.3
Uncertainty 0.4
Num. used stations
Type of magnitude Md
Reference to an origin 761939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:24:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FSSB.HHE. 2009-04-06T18:28:50.72 10.0 undecidable manual Sg 0 0 0
IV.FSSB.HHE. 2009-04-06T18:28:26.07 10.0 undecidable manual Pg 0 0 0
IV.MIDA.HHE. 2009-04-06T18:28:26.79 10.0 undecidable manual Sg 0 0 0
IV.PIEI.HHN. 2009-04-06T18:28:26.45 10.0 undecidable manual Pg 0 0 0
IV.GIUL.HHE. 2009-04-06T18:28:26.48 10.0 undecidable manual Sg 0 0 0
IV.RNI2.HHN. 2009-04-06T18:28:25.40 10.0 undecidable manual Pg 0 0 0
IV.RDP.BHE. 2009-04-06T18:28:25.81 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHE. 2009-04-06T18:28:24.61 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHE. 2009-04-06T18:28:23.85 10.0 undecidable manual Pg 0 0 0
IV.FDMO.HHE. 2009-04-06T18:28:22.76 0.3 undecidable manual Sg 342 85.3479 -0.005 66
IV.MGAB.HHN. 2009-04-06T18:28:20.84 10.0 undecidable manual Pg 0 0 0
IV.CING.HHZ. 2009-04-06T18:28:20.00 10.0 undecidable manual Pg 0 0 0
IV.SDI.SHZ. 2009-04-06T18:28:20.27 0.1 undecidable manual Sg 153 73.7706 0.606 78
IV.SNTG.SHZ. 2009-04-06T18:28:18.04 10.0 undecidable manual Pg 0 0 0
IV.NRCA.SHZ. 2009-04-06T18:28:17.45 0.1 undecidable manual Sg 338 63.492 0.538 82
IV.GIUL.HHE. 2009-04-06T18:28:15.19 10.0 undecidable manual Pg 0 0 0
IV.ASSB.HHZ. 2009-04-06T18:28:15.28 10.0 undecidable manual Pg 0 0 0
IV.MIDA.HHE. 2009-04-06T18:28:14.36 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHZ. 2009-04-06T18:28:13.80 0.1 undecidable manual Sg 128 52.2033 -0.1 92
IV.VVLD.HHZ. 2009-04-06T18:28:13.43 0.1 undecidable manual Sg 160 51.3153 -0.245 90
IV.POFI.HHN. 2009-04-06T18:28:12.22 10.0 undecidable manual Pg 0 0 0
IV.FDMO.HHE. 2009-04-06T18:28:11.65 0.6 undecidable manual Pg 342 85.3479 -0.316 41
IV.OFFI.HHZ. 2009-04-06T18:28:10.54 1.0 undecidable manual Pg 18 73.5708 0.389 21
IV.VCEL.EHZ. 2009-04-06T18:28:10.28 0.1 undecidable manual Sg 74 36.9297 0.46 88
IV.SDI.SHZ. 2009-04-06T18:28:09.71 0.1 undecidable manual Pg 153 73.7706 -0.466 82
IV.STR3.BHZ. 2009-04-06T18:28:09.34 10.0 undecidable manual Pg 0 0 0
IV.PTQR.SHZ. 2009-04-06T18:28:08.14 0.1 undecidable manual Sg 181 31.2465 -0.181 94
IV.NRCA.SHZ. 2009-04-06T18:28:08.41 0.1 undecidable manual Pg 338 63.492 -0.181 89
IV.MTCE.HHE. 2009-04-06T18:28:08.53 0.1 undecidable manual Pg 241 62.9925 0.019 92
IV.GUAR.HHZ. 2009-04-06T18:28:08.38 0.1 undecidable manual Pg 188 56.9985 0.785 75
IV.CAMP.HHE. 2009-04-06T18:28:07.03 0.1 undecidable manual Sg 0 25.752 0.277 93
IV.MNS.HHZ. 2009-04-06T18:28:07.84 0.1 undecidable manual Pg 279 60.2952 -0.25 88
IV.VVLD.HHZ. 2009-04-06T18:28:06.28 0.1 undecidable manual Pg 160 51.3153 -0.435 86
IV.FIAM.HHN. 2009-04-06T18:28:06.27 0.1 undecidable manual Sg 261 24.1536 0.025 99
IV.INTR.HHZ. 2009-04-06T18:28:06.53 0.1 undecidable manual Pg 128 52.2033 -0.314 88
IV.CERT.HHZ. 2009-04-06T18:28:06.84 0.1 undecidable manual Pg 222 52.7028 -0.084 93
IV.PTQR.SHZ. 2009-04-06T18:28:04.19 0.1 undecidable manual Pg 181 31.2465 0.561 86
IV.VCEL.EHZ. 2009-04-06T18:28:04.60 0.1 undecidable manual Pg 74 36.9297 0.11 95
IV.TERO.HHZ. 2009-04-06T18:28:03.90 0.1 undecidable manual Pg 24 38.8278 -0.896 74
.FAGN.---. 2009-04-06T18:28:03.50 0.3 undecidable manual Sg 106 15.0738 0.074 74
IV.CAMP.HHE. 2009-04-06T18:28:02.25 0.1 undecidable manual Pg 0 25.752 -0.471 89
IV.FIAM.HHN. 2009-04-06T18:28:02.58 0.1 undecidable manual Pg 261 24.1536 0.149 96
.AQU.---. 2009-04-06T18:28:01.05 0.3 undecidable manual Sg 355 5.5944 -0.046 76
.FAGN.---. 2009-04-06T18:28:00.83 0.1 undecidable manual Pg 106 15.0738 0.029 100
.AQU.---. 2009-04-06T18:27:59.64 0.1 positive manual Pg 355 5.5944 0.188 98
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