Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 07-04-2009 and time 05:33:50 (Italy) in region NW L'Aquila (AQ)

A magnitude ML 2.1 earthquake occured in region: NW L'Aquila (AQ), on

  • 07-04-2009 03:33:50 (UTC)
  • 07-04-2009 05:33:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3540, 13.3950 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 0 69753 69753
Lucoli AQ 8 1011 70764
Ocre AQ 10 1167 71931
Fossa AQ 10 721 72652
Tornimparte AQ 10 3187 75839
Scoppito AQ 12 3727 79566
Pizzoli AQ 12 4326 83892
Poggio Picenze AQ 13 1136 85028
Sant'Eusanio Forconese AQ 13 394 85422
Barete AQ 14 737 86159
Villa Sant'Angelo AQ 15 424 86583
Rocca di Cambio AQ 15 533 87116
San Demetrio ne' Vestini AQ 15 1854 88970
Barisciano AQ 16 1828 90798
Cagnano Amiterno AQ 18 1369 92167
Fagnano Alto AQ 19 418 92585
Rocca di Mezzo AQ 19 1526 94111
Prata d'Ansidonia AQ 19 496 94607

Municipalities with at least 50000 inhabitants

An earthquake occurred to
0 Km NW of L'Aquila (69753 inhabitants)
43 Km SW of Teramo (54892 inhabitants)
64 Km W of Chieti (51815 inhabitants)
65 Km W of Montesilvano (53738 inhabitants)
66 Km E of Terni (111501 inhabitants)
66 Km NE of Tivoli (56533 inhabitants)
68 Km NE of Guidonia Montecelio (88673 inhabitants)
68 Km W of Pescara (121014 inhabitants)
88 Km SE of Foligno (57155 inhabitants)
90 Km NE of Velletri (53303 inhabitants)
91 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 2.1 2009-04-07
03:33:50		 42.354 13.395 9 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 765259
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-07 03:33:50 ± 0.1
Latitude 42.3540 ± 0.0063
Longitude 13.3950 ± 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 765259

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 701
Semi-minor axis of confidence ellipse (meter) 570
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 225
Circular confidence region, given by single value of horizontal uncertainty (meter) 989.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.74374
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 14
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.6
Num. used stations
Type of magnitude ML
Reference to an origin 765259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:28:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GRI.EHZ. 2009-04-07T03:34:52.00 10.0 undecidable manual Pg 0 0 0
IV.STR3.BHE. 2009-04-07T03:34:41.91 10.0 undecidable manual Pg 0 0 0
IV.LATE.HHN. 2009-04-07T03:34:33.59 10.0 undecidable manual Pg 0 0 0
IV.MGAB.HHN. 2009-04-07T03:34:30.62 10.0 undecidable manual Sg 0 0 0
IV.MURB.HHN. 2009-04-07T03:34:29.84 10.0 undecidable manual Sg 0 0 0
IV.CING.HHZ. 2009-04-07T03:34:26.70 10.0 undecidable manual Sg 0 0 0
IV.MIDA.HHE. 2009-04-07T03:34:25.59 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHN. 2009-04-07T03:34:25.59 10.0 undecidable manual Sg 0 0 0
IV.ASSB.HHE. 2009-04-07T03:34:21.53 10.0 undecidable manual Sg 0 0 0
IV.MURB.HHN. 2009-04-07T03:34:17.62 10.0 undecidable manual Pg 0 0 0
IV.ARVD.HHE. 2009-04-07T03:34:17.93 10.0 undecidable manual Sg 0 0 0
IV.MGAB.HHN. 2009-04-07T03:34:16.07 10.0 undecidable manual Pg 0 0 0
IV.CESI.HHE. 2009-04-07T03:34:16.39 0.3 undecidable manual Sg 331 82.5507 0.578 59
IV.CERA.HHN. 2009-04-07T03:34:16.53 10.0 undecidable manual Pg 0 0 0
IV.FDMO.HHN. 2009-04-07T03:34:15.74 0.3 undecidable manual Sg 342 79.7646 0.671 57
IV.ARVD.HHE. 2009-04-07T03:34:13.39 10.0 undecidable manual Pg 0 0 0
IV.CING.HHZ. 2009-04-07T03:34:13.98 10.0 undecidable manual Pg 0 0 0
IV.SNTG.SHZ. 2009-04-07T03:34:12.53 10.0 undecidable manual Pg 0 0 0
IV.MTCE.HHE. 2009-04-07T03:34:11.27 10.0 undecidable manual Sg 0 0 0
IV.PIEI.HHE. 2009-04-07T03:34:11.19 10.0 undecidable manual Pg 0 0 0
IV.GIUL.HHE. 2009-04-07T03:34:09.15 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHZ. 2009-04-07T03:34:09.42 0.3 undecidable manual Sg 132 56.499 0.547 63
IV.NRCA.SHZ. 2009-04-07T03:34:09.33 0.3 undecidable manual Sg 337 57.9975 0.089 70
IV.ASSB.HHE. 2009-04-07T03:34:08.86 10.0 undecidable manual Pg 0 0 0
IV.CESI.HHE. 2009-04-07T03:34:05.30 0.3 undecidable manual Pg 331 82.5507 0.008 67
IV.SDI.SHZ. 2009-04-07T03:34:05.44 10.0 undecidable manual Pg 0 0 0
IV.OFFI.HHN. 2009-04-07T03:34:04.07 0.6 undecidable manual Pg 20 68.6757 0.915 35
IV.FDMO.HHN. 2009-04-07T03:34:04.55 0.6 undecidable manual Pg 342 79.7646 -0.313 42
IV.GUAR.HHN. 2009-04-07T03:34:04.69 10.0 undecidable manual Pg 0 0 0
IV.POFI.HHZ. 2009-04-07T03:34:04.23 0.6 undecidable manual Pg 160 75.2691 0.063 45
IV.PTQR.SHZ. 2009-04-07T03:34:02.97 0.6 undecidable manual Sg 179 36.8298 -0.631 42
IV.TERO.HHZ. 2009-04-07T03:34:02.03 0.3 undecidable manual Sg 30 34.3434 -0.922 56
IV.VVLD.HHE. 2009-04-07T03:34:01.36 0.6 undecidable manual Pg 161 56.8986 0.024 47
IV.NRCA.SHZ. 2009-04-07T03:34:01.05 0.6 undecidable manual Pg 337 57.9975 -0.449 43
IV.CERT.HHZ. 2009-04-07T03:34:01.14 0.3 undecidable manual Pg 217 56.2992 -0.107 70
IV.INTR.HHZ. 2009-04-07T03:34:01.46 0.1 undecidable manual Pg 132 56.499 0.18 91
IV.FIAM.HHZ. 2009-04-07T03:34:00.00 0.1 undecidable manual Sg 247 24.6531 -0.079 99
IV.MNS.HHE. 2009-04-07T03:34:00.19 10.0 undecidable manual Pg 0 0 0
IV.MTCE.HHE. 2009-04-07T03:33:59.00 10.0 undecidable manual Pg 0 0 0
IV.PTQR.SHZ. 2009-04-07T03:33:58.13 0.3 undecidable manual Pg 179 36.8298 -0.112 72
IV.FAGN.HHN. 2009-04-07T03:33:58.67 0.3 undecidable manual Sg 122 18.2706 0.624 65
IV.TERO.HHZ. 2009-04-07T03:33:57.47 0.3 undecidable manual Pg 30 34.3434 -0.397 68
IV.VCEL.EHZ. 2009-04-07T03:33:57.78 0.3 undecidable manual Pg 83 36.8298 -0.458 67
IV.FIAM.HHZ. 2009-04-07T03:33:56.25 0.1 undecidable manual Pg 247 24.6531 0.041 99
IV.FAGN.HHN. 2009-04-07T03:33:54.73 0.3 undecidable manual Pg 122 18.2706 -0.304 71
MN.AQU.HHZ. 2009-04-07T03:33:53.94 0.1 undecidable manual Sg 89 0.5994 -0.213 100
MN.AQU.HHZ. 2009-04-07T03:33:53.02 0.1 undecidable manual Pg 89 0.5994 0.232 100
IV.MA9.HHN. 2009-04-07T03:33:42.33 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