Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 09-02-2004 and time 23:54:01 (Italy) in region 4 km N Norcia (PG)

A magnitude Md 2.4 earthquake occured in region: 4 km N Norcia (PG), on

  • 09-02-2004 22:54:01 (UTC)
  • 09-02-2004 23:54:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8270, 13.0960 at 15 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
Norcia PG 4 4957 4957
Preci PG 7 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 12 1107 7069
Ussita MC 14 444 7513
Cascia PG 14 3217 10730
Cerreto di Spoleto PG 15 1075 11805
Sellano PG 15 1079 12884
Arquata del Tronto AP 18 1178 14062
Poggiodomo PG 18 117 14179
Accumoli RI 19 667 14846
Montegallo AP 20 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
58 Km NW of L'Aquila (69753 inhabitants)
65 Km E of Perugia (166134 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km N of Tivoli (56533 inhabitants)
100 Km W of Pescara (121014 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-VAX 1.7 		2004-02-09
22:54:01		 42.827 13.096 15 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 493099
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2004-02-09 22:54:01 ± 0.222
Latitude 42.8270 ± 0.0087
Longitude 13.0960 ± 0.0232
Depth (km) 15 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 493099

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2130.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00008
Epicentral distance of station farthest from the epicenter (degree) 0.00801
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 493099
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:50:47

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 493099
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.FSSB.Z. 2004-02-09T22:54:33.63 10.0 undecidable manual SG 345 0.888 1.38 0.1
--.PTQR.Z. 2004-02-09T22:54:29.49 10.0 undecidable manual SG 164 0.8214 -0.85 0.3
--.ARV.Z. 2004-02-09T22:54:25.44 10.0 undecidable manual SG 350 0.6771 0.05 0.7
--.MURB.Z. 2004-02-09T22:54:23.93 10.0 undecidable manual SG 316 0.5994 1.02 0.2
--.MNS.Z. 2004-02-09T22:54:21.60 10.0 undecidable manual SG 214 0.5328 0.25 0.7
--.CING.Z. 2004-02-09T22:54:21.60 10.0 undecidable manual SG 7 0.5439 0.29 0.7
--.AQU.Z. 2004-02-09T22:54:20.51 10.0 undecidable manual SG 154 0.5217 0.13 0.8
--.FSSB.Z. 2004-02-09T22:54:19.36 10.0 undecidable manual PG 345 0.888 0.08 1.5
--.PTQR.Z. 2004-02-09T22:54:19.84 10.0 undecidable manual PG 164 0.8214 1.66 0.1
--.SNTG.Z. 2004-02-09T22:54:17.55 10.0 undecidable manual SG 345 0.444 -0.22 0.8
--.ASS.Z. 2004-02-09T22:54:16.10 10.0 undecidable manual SG 306 0.3996 -0.34 0.7
--.ARV.Z. 2004-02-09T22:54:14.84 10.0 undecidable manual PG 350 0.6771 -0.47 1.4
--.MURB.Z. 2004-02-09T22:54:13.76 10.0 undecidable manual PG 316 0.5994 -0.13 1.9
--.MNS.Z. 2004-02-09T22:54:12.18 10.0 undecidable manual PG 214 0.5328 -0.49 1.5
--.CING.Z. 2004-02-09T22:54:12.61 10.0 undecidable manual PG 7 0.5439 -0.35 1.7
--.AQU.Z. 2004-02-09T22:54:11.84 10.0 undecidable manual PG 154 0.5217 -0.58 1.4
--.SNTG.Z. 2004-02-09T22:54:10.59 10.0 undecidable manual PG 345 0.444 -0.32 1.8
--.ASS.Z. 2004-02-09T22:54:09.98 10.0 undecidable manual PG 306 0.3996 -0.18 1.9
--.NRCA.Z. 2004-02-09T22:54:07.42 10.0 undecidable manual SG 65 0.0111 0.84 0.4
--.NRCA.Z. 2004-02-09T22:54:03.89 10.0 undecidable manual PG 65 0.0111 -0.56 1.4
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