Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 11-04-2009 and time 07:32:09 (UTC) in region 4 km NW Fossa (AQ)

A magnitude ML 2.1 earthquake occured in region: 4 km NW Fossa (AQ), on

  • 11-04-2009 07:32:09 (UTC)
  • 11-04-2009 09:32:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3300, 13.4660 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
Fossa AQ 4 721 721
Ocre AQ 5 1167 1888
L'Aquila AQ 6 69753 71641
Poggio Picenze AQ 6 1136 72777
Sant'Eusanio Forconese AQ 7 394 73171
Villa Sant'Angelo AQ 9 424 73595
San Demetrio ne' Vestini AQ 9 1854 75449
Barisciano AQ 10 1828 77277
Rocca di Cambio AQ 10 533 77810
Lucoli AQ 11 1011 78821
Fagnano Alto AQ 12 418 79239
Prata d'Ansidonia AQ 13 496 79735
Tornimparte AQ 14 3187 82922
Rocca di Mezzo AQ 14 1526 84448
Santo Stefano di Sessanio AQ 15 111 84559
Fontecchio AQ 16 369 84928
San Pio delle Camere AQ 16 661 85589
Scoppito AQ 18 3727 89316
Carapelle Calvisio AQ 18 87 89403
Pizzoli AQ 18 4326 93729
Castelvecchio Calvisio AQ 19 153 93882
Calascio AQ 19 137 94019
Caporciano AQ 19 230 94249
Tione degli Abruzzi AQ 20 310 94559

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of L'Aquila (69753 inhabitants)
42 Km SW of Teramo (54892 inhabitants)
58 Km W of Chieti (51815 inhabitants)
60 Km W of Montesilvano (53738 inhabitants)
63 Km W of Pescara (121014 inhabitants)
68 Km NE of Tivoli (56533 inhabitants)
71 Km NE of Guidonia Montecelio (88673 inhabitants)
72 Km E of Terni (111501 inhabitants)
91 Km NE of Velletri (53303 inhabitants)
94 Km SE of Foligno (57155 inhabitants)
94 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 		Md 2.4
ML 2.1 		2009-04-11
07:32:09		 42.33 13.466 10 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 789489
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-11 07:32:09 ± 0.09
Latitude 42.3300 ± 0.0054
Longitude 13.4660 ± 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 789489

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 654
Semi-minor axis of confidence ellipse (meter) 336
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 49
Circular confidence region, given by single value of horizontal uncertainty (meter) 848.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.47
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.79050
Number of stations at which the event was observed 39
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 789489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:57:00

Md:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 789489
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:57:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AOI.HHN. 2009-04-11T07:32:53.81 10.0 undecidable manual Sg 0 0 0
IV.GROG.HHZ. 2009-04-11T07:32:48.97 10.0 undecidable manual Pg 0 0 0
IV.PARC.HHN. 2009-04-11T07:32:43.91 10.0 undecidable manual Pg 0 0 0
IV.RNI2.HHE. 2009-04-11T07:32:39.33 10.0 undecidable manual Pg 0 0 0
IV.PIEI.HHE. 2009-04-11T07:32:36.18 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHN. 2009-04-11T07:32:36.04 10.0 undecidable manual Sg 0 0 0
IV.AOI.HHN. 2009-04-11T07:32:35.08 10.0 undecidable manual Pg 0 0 0
IV.FSSB.SHZ. 2009-04-11T07:32:35.86 10.0 undecidable manual Pg 0 0 0
IV.ARVD.HHN. 2009-04-11T07:32:34.84 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHN. 2009-04-11T07:32:34.56 10.0 undecidable manual Sg 0 0 0
IV.CAFR.HHN. 2009-04-11T07:32:33.52 10.0 undecidable manual Pg 0 0 0
IV.MGAB.HHN. 2009-04-11T07:32:33.04 10.0 undecidable manual Pg 0 0 0
IV.MURB.HHN. 2009-04-11T07:32:32.04 10.0 undecidable manual Pg 0 0 0
IV.LPEL.HHZ. 2009-04-11T07:32:29.54 0.3 undecidable manual Sg 118 66.7776 -0.014 68
IV.CING.HHN. 2009-04-11T07:32:29.73 10.0 undecidable manual Pg 0 0 0
IV.CERA.HHN. 2009-04-11T07:32:28.68 10.0 undecidable manual Pg 0 0 0
IV.STR3.BHZ. 2009-04-11T07:32:28.37 10.0 undecidable manual Pg 0 0 0
IV.SNTG.SHZ. 2009-04-11T07:32:27.79 10.0 undecidable manual Pg 0 0 0
IV.INTR.HHZ. 2009-04-11T07:32:25.63 0.1 undecidable manual Sg 134 50.5161 0.429 86
IV.GIUL.HHN. 2009-04-11T07:32:24.99 0.3 undecidable manual Pg 192 87.4458 0.913 50
IV.LNSS.HHZ. 2009-04-11T07:32:24.81 0.6 undecidable manual Sg 311 46.1205 0.771 38
IV.CESI.HHN. 2009-04-11T07:32:24.09 0.3 undecidable manual Pg 329 87.7455 -0.036 65
IV.CESX.HHZ. 2009-04-11T07:32:23.37 0.3 undecidable manual Pg 293 78.8655 0.608 58
IV.FDMO.HHZ. 2009-04-11T07:32:23.36 0.3 undecidable manual Pg 339 84.249 -0.222 63
IV.MTCE.HHZ. 2009-04-11T07:32:22.70 10.0 undecidable manual Pg 0 0 0
IV.POFI.HHZ. 2009-04-11T07:32:21.18 0.3 undecidable manual Pg 163 70.9734 -0.359 63
IV.SDI.SHZ. 2009-04-11T07:32:21.76 0.6 undecidable manual Pg 157 74.4699 -0.318 42
IV.MNS.HHZ. 2009-04-11T07:32:21.14 0.3 undecidable manual Pg 276 64.6908 0.571 60
IV.OFFI.HHZ. 2009-04-11T07:32:21.40 0.3 undecidable manual Pg 15 69.375 0.099 67
IV.TERO.HHZ. 2009-04-11T07:32:20.76 0.3 undecidable manual Sg 19 34.3434 -0.127 71
IV.PTQR.SHZ. 2009-04-11T07:32:20.51 0.3 undecidable manual Sg 189 34.6431 -0.463 66
IV.VCEL.EHZ. 2009-04-11T07:32:20.71 0.3 undecidable manual Sg 77 31.4463 0.582 63
IV.LPEL.HHZ. 2009-04-11T07:32:20.31 0.3 undecidable manual Pg 118 66.7776 -0.587 59
IV.GUAR.HHZ. 2009-04-11T07:32:20.91 0.1 undecidable manual Pg 192 60.7947 0.937 69
SI.RISI.BHN. 2009-04-11T07:32:20.15 10.0 undecidable manual Pg 0 0 0
IV.CERT.HHZ. 2009-04-11T07:32:19.73 0.1 undecidable manual Pg 223 58.0974 0.167 89
IV.FIAM.HHE. 2009-04-11T07:32:19.19 0.3 undecidable manual Sg 257 29.4483 -0.403 67
IV.VVLD.HHZ. 2009-04-11T07:32:18.37 0.3 undecidable manual Pg 166 52.7028 -0.36 65
IV.LNSS.HHZ. 2009-04-11T07:32:17.45 0.1 undecidable manual Pg 311 46.1205 -0.266 89
IV.INTR.HHZ. 2009-04-11T07:32:17.89 0.1 undecidable manual Pg 134 50.5161 -0.495 84
IV.CAMP.HHZ. 2009-04-11T07:32:17.69 0.3 undecidable manual Sg 348 23.2545 -0.199 71
IV.TERO.HHZ. 2009-04-11T07:32:15.25 0.3 undecidable manual Pg 19 34.3434 -0.645 62
IV.PTQR.SHZ. 2009-04-11T07:32:15.56 0.1 positive manual Pg 189 34.6431 -0.383 89
IV.VCEL.EHZ. 2009-04-11T07:32:15.88 0.1 undecidable manual Pg 77 31.4463 0.424 89
IV.FIAM.HHE. 2009-04-11T07:32:14.91 0.1 negative manual Pg 257 29.4483 -0.237 93
IV.FAGN.HHZ. 2009-04-11T07:32:14.56 0.1 undecidable manual Sg 127 11.9769 0.015 100
MN.AQU.HHZ. 2009-04-11T07:32:13.31 0.3 undecidable manual Sg 296 5.8941 0.146 74
IV.CAMP.HHZ. 2009-04-11T07:32:13.87 0.3 undecidable manual Pg 348 23.2545 -0.294 69
IV.FAGN.HHZ. 2009-04-11T07:32:12.19 0.1 positive manual Pg 127 11.9769 -0.044 99
MN.AQU.HHZ. 2009-04-11T07:32:11.69 0.1 positive manual Pg 296 5.8941 0.254 96
IV.ORI.EHZ. 2009-04-11T07:31:56.09 10.0 undecidable manual Pg 0 0 0
IV.NRCA.SHZ. 2009-04-11T07:31:10.03 10.0 undecidable manual Sg 0 0 0
IV.NRCA.SHZ. 2009-04-11T07:31:02.07 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