Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 09-04-2009 and time 00:46:49 (Italy) in region 1 km NE San Demetrio ne' Vestini (AQ)

A magnitude ML 1.8 earthquake occured in region: 1 km NE San Demetrio ne' Vestini (AQ), on

  • 08-04-2009 22:46:49 (UTC)
  • 09-04-2009 00:46:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.2940, 13.5660 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
San Demetrio ne' Vestini AQ 1 1854 1854
Villa Sant'Angelo AQ 3 424 2278
Sant'Eusanio Forconese AQ 3 394 2672
Poggio Picenze AQ 4 1136 3808
Prata d'Ansidonia AQ 4 496 4304
Barisciano AQ 4 1828 6132
Fagnano Alto AQ 4 418 6550
Fossa AQ 6 721 7271
San Pio delle Camere AQ 7 661 7932
Fontecchio AQ 8 369 8301
Ocre AQ 8 1167 9468
Santo Stefano di Sessanio AQ 9 111 9579
Rocca di Cambio AQ 9 533 10112
Carapelle Calvisio AQ 10 87 10199
Caporciano AQ 10 230 10429
Rocca di Mezzo AQ 10 1526 11955
Castelvecchio Calvisio AQ 10 153 12108
Calascio AQ 11 137 12245
Tione degli Abruzzi AQ 12 310 12555
Navelli AQ 15 554 13109
L'Aquila AQ 15 69753 82862
Castel del Monte AQ 16 413 83275
Ofena AQ 16 506 83781
Capestrano AQ 17 884 84665
Acciano AQ 18 327 84992
Villa Santa Lucia degli Abruzzi AQ 18 123 85115
Secinaro AQ 18 359 85474
Ovindoli AQ 18 1227 86701
Lucoli AQ 19 1011 87712
Collepietro AQ 20 237 87949

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of L'Aquila (69753 inhabitants)
42 Km S of Teramo (54892 inhabitants)
50 Km W of Chieti (51815 inhabitants)
54 Km W of Montesilvano (53738 inhabitants)
57 Km W of Pescara (121014 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
76 Km E of Guidonia Montecelio (88673 inhabitants)
81 Km E of Terni (111501 inhabitants)
94 Km NE of Velletri (53303 inhabitants)
100 Km E 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 2.2
ML 1.8 		2009-04-08
22:46:49		 42.294 13.566 9 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 776369
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2009-04-08 22:46:49 ± 0.11
Latitude 42.2940 ± 0.0063
Longitude 13.5660 ± 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 776369

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 803
Semi-minor axis of confidence ellipse (meter) 463
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
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) 75
Number of associated phases, regardless of their use for origin computation 29
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) 0.63402
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 776369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:32

Md:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 776369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 14:41:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SDI.SHZ. 2009-04-08T22:47:11.53 0.1 undecidable manual Sg 163 67.7766 0.689 77
IV.NRCA.SHZ. 2009-04-08T22:47:11.61 0.1 undecidable manual Sg 328 70.374 0.09 91
IV.CERT.HHN. 2009-04-08T22:47:09.68 10.0 undecidable manual Sg 0 0 0
IV.GUAR.HHE. 2009-04-08T22:47:08.89 10.0 undecidable manual Sg 0 0 0
IV.MNS.HHZ. 2009-04-08T22:47:07.67 10.0 undecidable manual Pg 0 0 0
IV.CERT.HHN. 2009-04-08T22:47:06.15 10.0 undecidable manual Pg 0 0 0
IV.GUAR.HHE. 2009-04-08T22:47:05.82 10.0 undecidable manual Pg 0 0 0
IV.VVLD.HHE. 2009-04-08T22:47:05.92 0.6 undecidable manual Sg 174 47.3193 0.564 42
IV.FIAM.HHZ. 2009-04-08T22:47:02.57 0.6 undecidable manual Sg 266 36.9297 -0.036 49
IV.NRCA.SHZ. 2009-04-08T22:47:02.09 0.1 undecidable manual Pg 328 70.374 -0.288 87
IV.SDI.SHZ. 2009-04-08T22:47:01.78 0.1 undecidable manual Pg 163 67.7766 -0.209 89
IV.PTQR.SHZ. 2009-04-08T22:47:01.10 0.1 undecidable manual Sg 204 33.0447 -0.469 90
IV.TERO.HHN. 2009-04-08T22:47:01.59 0.6 undecidable manual Sg 5 36.6411 -0.925 37
IV.VCEL.EHN. 2009-04-08T22:46:59.52 0.6 undecidable manual Sg 63 25.1526 0.323 47
IV.LNSS.HHZ. 2009-04-08T22:46:59.65 0.6 undecidable manual Pg 309 55.0005 -0.373 44
IV.VVLD.HHE. 2009-04-08T22:46:58.91 0.3 undecidable manual Pg 174 47.3193 0.082 71
IV.INTR.HHE. 2009-04-08T22:46:57.98 0.3 undecidable manual Pg 138 41.9247 -0.017 73
IV.T0104.EHZ. 2009-04-08T22:46:57.95 0.1 undecidable manual Sg 292 20.0688 0.365 94
IV.CDCA.EHZ. 2009-04-08T22:46:57.04 10.0 undecidable manual Pg 0 0 0
IV.FIAM.HHZ. 2009-04-08T22:46:57.06 0.6 undecidable manual Pg 266 36.9297 -0.173 47
IV.PTQR.SHZ. 2009-04-08T22:46:56.56 0.1 undecidable manual Pg 204 33.0447 -0.075 97
IV.TERO.HHN. 2009-04-08T22:46:56.63 0.1 undecidable manual Pg 5 36.6411 -0.552 87
IV.CAMP.HHZ. 2009-04-08T22:46:56.65 0.1 undecidable manual Pg 334 29.748 0.52 89
IV.VCEL.EHN. 2009-04-08T22:46:55.95 0.3 undecidable manual Pg 63 25.1526 0.684 63
MN.AQU.HHZ. 2009-04-08T22:46:55.94 0.1 undecidable manual Sg 296 15.0738 -0.106 100
IV.T0104.EHZ. 2009-04-08T22:46:54.95 0.1 undecidable manual Pg 292 20.0688 0.615 87
MN.AQU.HHZ. 2009-04-08T22:46:53.54 0.1 undecidable manual Pg 296 15.0738 0.093 100
IV.FAGN.HHZ. 2009-04-08T22:46:52.59 0.3 undecidable manual Sg 155 3.3966 -0.759 63
IV.FAGN.HHZ. 2009-04-08T22:46:51.59 0.1 undecidable manual Pg 155 3.3966 -0.299 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