Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 4.0 on date 08-11-1997 and time 16:31:53 (Italy) in region 2 km SE Preci (PG)

A magnitude Md 4.0 earthquake occured in region: 2 km SE Preci (PG), on

  • 08-11-1997 15:31:53 (UTC)
  • 08-11-1997 16:31:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.86, 13.05 at 10 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 2 724 724
Visso MC 8 1107 1831
Norcia PG 8 4957 6788
Castelsantangelo sul Nera MC 9 281 7069
Sellano PG 11 1079 8148
Ussita MC 12 444 8592
Cerreto di Spoleto PG 12 1075 9667
Monte Cavallo MC 15 145 9812
Cascia PG 16 3217 13029
Vallo di Nera PG 19 364 13393
Poggiodomo PG 19 117 13510
Fiordimonte MC 20 202 13712

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
58 Km W of Teramo (54892 inhabitants)
60 Km E of Perugia (166134 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
98 Km W of Montesilvano (53738 inhabitants)
99 Km N of Guidonia Montecelio (88673 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 4.0 1997-11-08
15:31:53		 42.86 13.05 10 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 310769
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-11-08 15:31:53 ± 0.13
Latitude 42.86 ± 0.01
Longitude 13.05 ± 0.02
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 310769

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) 1751
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
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) 0.0004
Epicentral distance of station farthest from the epicenter (degree) 0.01279
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

Md:4

Field Value
Value 4
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 310769
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:51:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CSNT.Z. 1997-11-08T15:32:40.53 10.0 undecidable manual SN 296 0.0128 2.96 0
--.CSNT.Z. 1997-11-08T15:32:19.31 10.0 undecidable manual PN 296 0.0128 0.45 0.7
--.SFI.Z. 1997-11-08T15:32:18.77 10.0 undecidable manual PN 320 0.0122 0.75 0.4
--.SDI.Z. 1997-11-08T15:32:17.21 10.0 undecidable manual PN 153 0.0115 0.27 0.9
--.ARV.Z. 1997-11-08T15:32:16.60 10.0 undecidable manual SG 353 0.0057 0.27 0.5
--.RSM.Z. 1997-11-08T15:32:15.86 10.0 undecidable manual PN 337 0.0104 0.7 0.5
--.CRE.Z. 1997-11-08T15:32:14.11 10.0 undecidable manual PN 313 0.0099 -0.38 0.9
--.RDP.Z. 1997-11-08T15:32:14.34 10.0 undecidable manual PN 192 0.0101 -0.53 0.7
--.RMP.Z. 1997-11-08T15:32:14.15 10.0 undecidable manual PN 193 0.0097 -0.05 1.1
--.MNS.Z. 1997-11-08T15:32:13.10 10.0 undecidable manual SG 209 0.0049 0.15 0.5
--.PQ9.Z. 1997-11-08T15:32:10.21 10.0 undecidable manual PG 162 0.0079 -0.46 0.9
--.FB9.Z. 1997-11-08T15:32:09.62 10.0 negative manual PG 346 0.0076 -0.59 1.5
--.SNTG.Z. 1997-11-08T15:32:08.30 10.0 undecidable manual SG 348 0.0036 0.23 0.5
--.ASS.Z. 1997-11-08T15:32:06.75 10.0 undecidable manual SG 304 0.0032 0.17 0.5
--.AQU.Z. 1997-11-08T15:32:05.14 10.0 undecidable manual PG 153 0.0051 0.19 1.2
--.ARV.Z. 1997-11-08T15:32:05.88 10.0 negative manual PG 353 0.0057 -0.4 2.1
--.MNS.Z. 1997-11-08T15:32:04.18 10.0 positive manual PG 209 0.0049 -0.41 2.1
--.SNTG.Z. 1997-11-08T15:32:01.49 10.0 negative manual PG 348 0.0036 -0.34 2.2
--.ASS.Z. 1997-11-08T15:32:00.40 10.0 negative manual PG 304 0.0032 -0.57 1.7
--.NRCA.Z. 1997-11-08T15:31:57.00 10.0 undecidable manual SG 122 0.0004 -0.32 0.5
--.NRCA.Z. 1997-11-08T15:31:56.18 10.0 positive manual PG 122 0.0004 0.56 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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