Earthquake with magnitude of Md 2.3 on date 18-07-2002 and time 02:32:35 (Italy) in region 4 km E Norcia (PG)

A magnitude Md 2.3 earthquake occured in region: 4 km E Norcia (PG), on

  • 18-07-2002 00:32:35 (UTC)
  • 18-07-2002 02:32:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.14 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.

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
Arquata del Tronto AP 13 1178 6135
Castelsantangelo sul Nera MC 13 281 6416
Cascia PG 13 3217 9633
Accumoli RI 13 667 10300
Preci PG 14 724 11024
Montegallo AP 17 523 11547
Visso MC 17 1107 12654
Cittareale RI 18 482 13136
Ussita MC 18 444 13580
Poggiodomo PG 19 117 13697
Cerreto di Spoleto PG 19 1075 14772
Montemonaco AP 20 604 15376

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
94 Km W of Pescara (121014 inhabitants)
95 Km NE of Tivoli (56533 inhabitants)
96 Km NW of Chieti (51815 inhabitants)
98 Km SW of Ancona (100861 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
Rev 1000 Md 2.3 2002-07-18
00:32:35
42.78 13.15 15 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 445519
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2002-07-18 00:32:35 ± 0.374
Latitude 42.78 ± 0.01
Longitude 13.15 ± 0.03
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 445519

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) 2607.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 232
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00049
Epicentral distance of station farthest from the epicenter (degree) 0.00656
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 445519
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:01:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 2002-07-18T00:33:01.56 10.0 undecidable manual SG 348 0.0066 0.35 0.1
--.MNS.Z. 2002-07-18T00:32:54.45 10.0 undecidable manual SG 220 0.0047 -0.07 0.5
--.ASS.Z. 2002-07-18T00:32:52.57 10.0 undecidable manual SG 308 0.004 0.14 0.4
--.ARV.Z. 2002-07-18T00:32:50.60 10.0 undecidable manual PG 348 0.0066 -0.38 0.1
--.MNS.Z. 2002-07-18T00:32:46.55 10.0 positive manual PG 220 0.0047 -0.03 2.4
--.ASS.Z. 2002-07-18T00:32:45.38 10.0 positive manual PG 308 0.004 0.01 2.6
--.NRCA.Z. 2002-07-18T00:32:40.56 10.0 undecidable manual SG 335 0.0005 -0.44 0
--.NRCA.Z. 2002-07-18T00:32:38.93 10.0 positive manual PG 335 0.0005 0.16 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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