Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 4.1 on date 16-10-1997 and time 00:53:09 (Italy) in region 6 km NW Preci (PG)

A magnitude Md 4.1 earthquake occured in region: 6 km NW Preci (PG), on

  • 15-10-1997 22:53:09 (UTC)
  • 16-10-1997 00:53:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.92, 12.99 at 6 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
Preci PG 6 724 724
Sellano PG 6 1079 1803
Visso MC 8 1107 2910
Monte Cavallo MC 8 145 3055
Ussita MC 12 444 3499
Cerreto di Spoleto PG 13 1075 4574
Castelsantangelo sul Nera MC 14 281 4855
Pieve Torina MC 15 1458 6313
Fiordimonte MC 15 202 6515
Norcia PG 17 4957 11472
Serravalle di Chienti MC 17 1070 12542
Pievebovigliana MC 17 866 13408
Muccia MC 18 915 14323
Fiastra MC 19 559 14882
Acquacanina MC 19 121 15003
Vallo di Nera PG 20 364 15367

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
88 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
Bulletin
Rev1000 		Md 4.1
ML-MEDNET 4.1 		1997-10-15
22:53:09		 42.92 12.99 6 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 301259
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-10-15 22:53:09 ± 0.328
Latitude 42.92 ± 0.01
Longitude 12.99 ± 0.02
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 301259

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) 1948.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.01214
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

Md:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 301259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:43:04

ML:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations
Type of magnitude ML
Reference to an origin 301259
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 10:37:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FB9.Z. 1997-10-15T22:53:36.84 10.0 undecidable manual SG 348 0.007 -0.37 0.3
--.SDI.Z. 1997-10-15T22:53:35.40 10.0 undecidable manual PN 152 0.0121 0.8 0.3
--.SFI.Z. 1997-10-15T22:53:34.15 10.0 undecidable manual PN 319 0.0115 0.5 0.8
--.CSNT.Z. 1997-10-15T22:53:34.94 10.0 undecidable manual PN 294 0.0121 0.33 1
--.RDP.Z. 1997-10-15T22:53:32.80 10.0 undecidable manual PN 189 0.0106 -0.13 1.1
--.AQU.Z. 1997-10-15T22:53:32.22 10.0 undecidable manual SG 151 0.0057 -0.43 0.4
--.RSM.Z. 1997-10-15T22:53:32.60 10.0 undecidable manual PN 338 0.0097 1.23 0.1
--.RMP.Z. 1997-10-15T22:53:31.13 10.0 undecidable manual PN 190 0.0101 -0.39 0.8
--.MNS.Z. 1997-10-15T22:53:30.98 10.0 undecidable manual SG 202 0.0052 0.23 0.5
--.ARV.Z. 1997-10-15T22:53:29.73 10.0 undecidable manual SG 356 0.0052 -0.82 0.1
--.PQ9.Z. 1997-10-15T22:53:28.80 10.0 undecidable manual PG 161 0.0085 -0.36 0.9
--.FB9.Z. 1997-10-15T22:53:25.20 10.0 undecidable manual PG 348 0.007 -0.38 0.9
--.AQU.Z. 1997-10-15T22:53:23.13 10.0 positive manual PG 151 0.0057 0.36 2.4
--.MNS.Z. 1997-10-15T22:53:21.46 10.0 positive manual PG 202 0.0052 -0.21 2.6
--.ARV.Z. 1997-10-15T22:53:21.53 10.0 positive manual PG 356 0.0052 -0.02 2.9
--.ASS.Z. 1997-10-15T22:53:20.70 10.0 undecidable manual SG 299 0.0025 0.27 0.6
--.ASS.Z. 1997-10-15T22:53:15.62 10.0 undecidable manual PG 299 0.0025 -0.1 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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