Earthquake with magnitude of Md 2.7 on date 20-11-1997 and time 06:24:01 (Italy) in region 2 km NW Preci (PG)

A magnitude Md 2.7 earthquake occured in region: 2 km NW Preci (PG), on

  • 20-11-1997 05:24:01 (UTC)
  • 20-11-1997 06:24:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9, 13.02 at 4 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
Preci PG 3 724 724
Visso MC 7 1107 1831
Sellano PG 7 1079 2910
Castelsantangelo sul Nera MC 11 281 3191
Monte Cavallo MC 11 145 3336
Ussita MC 11 444 3780
Cerreto di Spoleto PG 12 1075 4855
Norcia PG 13 4957 9812
Fiordimonte MC 17 202 10014
Pieve Torina MC 17 1458 11472
Vallo di Nera PG 19 364 11836
Fiastra MC 19 559 12395
Pievebovigliana MC 19 866 13261
Acquacanina MC 20 121 13382
Cascia PG 20 3217 16599

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
62 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
92 Km NE of Viterbo (67173 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 2.7
ML-VAX 1.7
1997-11-20
05:24:01
42.9 13.02 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 313339
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-11-20 05:24:01 ± 0.134
Latitude 42.90 ± 0.01
Longitude 13.02 ± 0.02
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 313339

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) 1664
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.0119
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 313339
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:53:51

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 313339
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 Takeoff_angle Residual Weight
--.SDI.Z. 1997-11-20T05:24:26.87 10.0 undecidable manual PN 153 0.0119 0.2 1
--.AQU.Z. 1997-11-20T05:24:24.60 10.0 undecidable manual SG 152 0.0054 -0.12 0.7
--.PQ9.Z. 1997-11-20T05:24:21.00 10.0 undecidable manual PG 162 0.0083 0.68 0.4
--.SNTG.Z. 1997-11-20T05:24:16.00 10.0 undecidable manual SG 351 0.0032 0.38 0.5
--.AQU.Z. 1997-11-20T05:24:14.00 10.0 undecidable manual PG 152 0.0054 -0.63 0.6
--.ARV.Z. 1997-11-20T05:24:14.25 10.0 undecidable manual PG 354 0.0054 -0.25 1.6
--.ASS.Z. 1997-11-20T05:24:13.50 10.0 undecidable manual SG 301 0.0028 -0.29 0.6
--.SNTG.Z. 1997-11-20T05:24:09.77 10.0 undecidable manual PG 351 0.0032 0.09 2
--.ASS.Z. 1997-11-20T05:24:08.70 10.0 undecidable manual PG 301 0.0028 0.07 2.1
--.NRCA.Z. 1997-11-20T05:24:06.00 10.0 undecidable manual SG 132 0.0008 0.53 0.4
--.NRCA.Z. 1997-11-20T05:24:03.36 10.0 undecidable manual PG 132 0.0008 -0.46 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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