Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 07-04-2009 and time 08:57:21 (Italy) in region 1 km S Fossa (AQ)

A magnitude ML 2.1 earthquake occured in region: 1 km S Fossa (AQ), on

  • 07-04-2009 06:57:21 (UTC)
  • 07-04-2009 08:57:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.2840, 13.4880 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
Fossa AQ 1 721 721
Ocre AQ 1 1167 1888
Sant'Eusanio Forconese AQ 3 394 2282
Villa Sant'Angelo AQ 4 424 2706
Rocca di Cambio AQ 5 533 3239
San Demetrio ne' Vestini AQ 6 1854 5093
Poggio Picenze AQ 6 1136 6229
Fagnano Alto AQ 8 418 6647
Rocca di Mezzo AQ 9 1526 8173
Prata d'Ansidonia AQ 10 496 8669
Barisciano AQ 10 1828 10497
L'Aquila AQ 11 69753 80250
Fontecchio AQ 11 369 80619
Lucoli AQ 12 1011 81630
San Pio delle Camere AQ 14 661 82291
Santo Stefano di Sessanio AQ 15 111 82402
Tione degli Abruzzi AQ 15 310 82712
Tornimparte AQ 15 3187 85899
Caporciano AQ 16 230 86129
Carapelle Calvisio AQ 16 87 86216
Castelvecchio Calvisio AQ 17 153 86369
Ovindoli AQ 17 1227 87596
Calascio AQ 18 137 87733

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SE of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
57 Km W of Chieti (51815 inhabitants)
60 Km W of Montesilvano (53738 inhabitants)
63 Km W of Pescara (121014 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
70 Km E of Guidonia Montecelio (88673 inhabitants)
76 Km E of Terni (111501 inhabitants)
89 Km NE of Velletri (53303 inhabitants)
94 Km E of Roma (2864731 inhabitants)
99 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 		ML 2.1 2009-04-07
06:57:21		 42.284 13.488 11 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 765909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-07 06:57:21 ± 0.08
Latitude 42.2840 ± 0.0045
Longitude 13.4880 ± 0.0073
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 765909

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 589
Semi-minor axis of confidence ellipse (meter) 319
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 55
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) 53
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 26
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) 0.97307
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 17
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 765909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:29:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPAZ.BHZ. 2009-04-07T06:58:05.01 10.0 undecidable manual Pg 0 0 0
IV.CING.HHE. 2009-04-07T06:58:01.69 10.0 undecidable manual Pg 0 0 0
IV.GUMA.HHZ. 2009-04-07T06:57:52.40 10.0 undecidable manual Pg 0 0 0
IV.CESI.HHE. 2009-04-07T06:57:51.47 10.0 undecidable manual Pg 0 0 0
IV.MIDA.HHN. 2009-04-07T06:57:51.70 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHN. 2009-04-07T06:57:50.68 10.0 undecidable manual Pg 0 0 0
IV.RNI2.HHE. 2009-04-07T06:57:49.93 10.0 undecidable manual Pg 0 0 0
IV.SNTG.SHZ. 2009-04-07T06:57:49.50 10.0 undecidable manual Pg 0 0 0
IV.OFFI.HHN. 2009-04-07T06:57:49.27 10.0 undecidable manual Pg 0 0 0
IV.CAFR.HHE. 2009-04-07T06:57:46.45 10.0 undecidable manual Pg 0 0 0
IV.NRCA.SHZ. 2009-04-07T06:57:42.90 0.3 undecidable manual Sg 334 68.2761 0.543 61
IV.SDI.SHZ. 2009-04-07T06:57:42.16 0.3 undecidable manual Sg 157 68.9754 -0.392 64
IV.GIUL.HHE. 2009-04-07T06:57:40.86 10.0 undecidable manual Pg 0 0 0
IV.ASSB.HHZ. 2009-04-07T06:57:39.16 0.3 undecidable manual Pg 321 108.0141 -0.549 57
IV.FDMO.HHN. 2009-04-07T06:57:36.85 0.3 undecidable manual Pg 339 89.7435 -0.036 66
IV.INTR.HHE. 2009-04-07T06:57:36.52 0.1 undecidable manual Sg 131 45.621 0.192 93
IV.SDI.SHZ. 2009-04-07T06:57:34.01 0.3 undecidable manual Pg 157 68.9754 0.32 65
IV.TERO.HHZ. 2009-04-07T06:57:34.66 0.1 undecidable manual Sg 14 38.8278 0.158 94
IV.MNS.HHE. 2009-04-07T06:57:33.26 0.3 undecidable manual Pg 280 67.1772 -0.15 67
IV.NRCA.SHZ. 2009-04-07T06:57:33.84 0.3 undecidable manual Pg 334 68.2761 0.262 66
IV.PTQR.SHZ. 2009-04-07T06:57:32.28 0.1 undecidable manual Sg 194 29.9478 0.153 96
IV.FIAM.HHZ. 2009-04-07T06:57:32.12 0.1 undecidable manual Sg 267 30.5472 -0.166 96
IV.GUAR.HHE. 2009-04-07T06:57:32.65 0.3 undecidable manual Pg 195 56.1993 0.934 53
IV.POFI.HHN. 2009-04-07T06:57:32.36 0.6 undecidable manual Pg 164 65.49 -0.79 37
IV.CERT.HHZ. 2009-04-07T06:57:31.53 0.6 undecidable manual Pg 228 55.7997 -0.132 46
IV.VCEL.EHZ. 2009-04-07T06:57:31.77 0.3 undecidable manual Sg 67 31.4463 -0.758 60
IV.INTR.HHE. 2009-04-07T06:57:30.26 0.1 undecidable manual Pg 131 45.621 0.163 93
IV.VVLD.HHE. 2009-04-07T06:57:30.11 0.3 undecidable manual Pg 166 47.2194 -0.233 69
IV.TERO.HHZ. 2009-04-07T06:57:29.17 0.1 undecidable manual Pg 14 38.8278 0.128 95
IV.VCEL.EHZ. 2009-04-07T06:57:28.21 0.1 undecidable manual Pg 67 31.4463 0.308 93
IV.PTQR.SHZ. 2009-04-07T06:57:27.51 0.1 undecidable manual Pg 194 29.9478 -0.161 96
IV.FIAM.HHZ. 2009-04-07T06:57:27.76 0.1 undecidable manual Pg 267 30.5472 -0.003 99
MN.AQU.HHN. 2009-04-07T06:57:26.62 0.1 undecidable manual Sg 318 10.4784 -0.154 99
.CAMP.---. 2009-04-07T06:57:26.97 0.3 undecidable manual Pg 347 28.749 -0.517 67
IV.FAGN.HHZ. 2009-04-07T06:57:26.08 0.3 undecidable manual Sg 104 8.0808 -0.136 75
IV.FAGN.HHZ. 2009-04-07T06:57:24.40 0.1 undecidable manual Pg 104 8.0808 0.142 100
MN.AQU.HHN. 2009-04-07T06:57:24.78 0.1 undecidable manual Pg 318 10.4784 0.199 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