Earthquake with magnitude of Md 2.4 on date 22-11-2001 and time 04:11:23 (Italy) in region 6 km SE Norcia (PG)

A magnitude Md 2.4 earthquake occured in region: 6 km SE Norcia (PG), on

  • 22-11-2001 03:11:23 (UTC)
  • 22-11-2001 04:11:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.75, 13.14 at 12 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 6 4957 4957
Cascia PG 11 3217 8174
Accumoli RI 11 667 8841
Arquata del Tronto AP 13 1178 10019
Cittareale RI 15 482 10501
Castelsantangelo sul Nera MC 16 281 10782
Preci PG 16 724 11506
Poggiodomo PG 17 117 11623
Amatrice RI 19 2657 14280
Montegallo AP 19 523 14803
Monteleone di Spoleto PG 19 599 15402
Cerreto di Spoleto PG 19 1075 16477

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km SE of Foligno (57155 inhabitants)
45 Km E of Terni (111501 inhabitants)
48 Km W of Teramo (54892 inhabitants)
50 Km NW of L'Aquila (69753 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
94 Km W of Pescara (121014 inhabitants)
96 Km W of Chieti (51815 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 2.4 2001-11-22
03:11:23
42.75 13.14 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 431259
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2001-11-22 03:11:23 ± 0.21
Latitude 42.75 ± 0.01
Longitude 13.14 ± 0.02
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 431259

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) 2195.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.01036
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 431259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 23:47:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 2001-11-22T03:11:45.23 10.0 undecidable manual PN 154 0.0104 0.28 0.7
--.MNS.Z. 2001-11-22T03:11:41.23 10.0 undecidable manual SG 222 0.0045 0.1 0.6
--.SNTG.Z. 2001-11-22T03:11:41.67 10.0 undecidable manual SG 344 0.0046 -0.14 0.6
--.ASS.Z. 2001-11-22T03:11:40.74 10.0 undecidable manual SG 311 0.0042 0.55 0.2
--.SNTG.Z. 2001-11-22T03:11:33.18 10.0 undecidable manual PG 344 0.0046 -0.75 0.2
--.MNS.Z. 2001-11-22T03:11:33.15 10.0 positive manual PG 222 0.0045 -0.39 1.7
--.ASS.Z. 2001-11-22T03:11:32.82 10.0 undecidable manual PG 311 0.0042 -0.18 1.4
--.NRCA.Z. 2001-11-22T03:11:28.23 10.0 undecidable manual SG 347 0.0007 0.11 0.6
--.NRCA.Z. 2001-11-22T03:11:26.14 10.0 negative manual PG 347 0.0007 0.11 3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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