Earthquake with magnitude of Md 2.7 on date 18-10-1997 and time 01:00:59 (Italy) in region 4 km W Preci (PG)

A magnitude Md 2.7 earthquake occured in region: 4 km W Preci (PG), on

  • 17-10-1997 23:00:59 (UTC)
  • 18-10-1997 01:00:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.882, 12.996 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 4 724 724
Sellano PG 6 1079 1803
Visso MC 9 1107 2910
Cerreto di Spoleto PG 9 1075 3985
Monte Cavallo MC 13 145 4130
Norcia PG 13 4957 9087
Castelsantangelo sul Nera MC 13 281 9368
Ussita MC 14 444 9812
Vallo di Nera PG 17 364 10176
Cascia PG 18 3217 13393
Pieve Torina MC 19 1458 14851
Campello sul Clitunno PG 19 2442 17293
Fiordimonte MC 19 202 17495
Poggiodomo PG 20 117 17612

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
100 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 2.7
ML-VAX 1.6
1997-10-17
23:00:59
42.882 12.996 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 302609
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-10-17 23:00:59 ± 0.408
Latitude 42.8820 ± 0.0090
Longitude 12.9960 ± 0.0278
Depth (km) 4 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 302609

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) 2476.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.01182
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 302609
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:44:15

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 302609
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
--.FB9.Z. 1997-10-17T23:01:29.35 10.0 undecidable manual SG 348 0.0074 -0.03 0.7
--.SFI.Z. 1997-10-17T23:01:25.71 10.0 undecidable manual PN 320 0.0118 0.77 0.6
--.SDI.Z. 1997-10-17T23:01:25.67 10.0 undecidable manual PN 152 0.0118 0.74 0.7
--.ARV.Z. 1997-10-17T23:01:22.56 10.0 undecidable manual SG 356 0.0055 -0.16 0.7
--.CRE.Z. 1997-10-17T23:01:21.88 10.0 undecidable manual PG 314 0.0095 0.64 0.9
--.MNS.Z. 1997-10-17T23:01:20.12 10.0 undecidable manual SG 204 0.0049 -0.4 0.6
--.PQ9.Z. 1997-10-17T23:01:19.31 10.0 undecidable manual PG 160 0.0082 0.84 0.7
--.FB9.Z. 1997-10-17T23:01:16.20 10.0 undecidable manual PG 348 0.0074 -0.88 0.7
--.ARV.Z. 1997-10-17T23:01:12.43 10.0 undecidable manual PG 356 0.0055 -0.63 1.1
--.AQU.Z. 1997-10-17T23:01:12.46 10.0 undecidable manual PG 150 0.0054 -0.39 1.5
--.ASS.Z. 1997-10-17T23:01:12.60 10.0 undecidable manual SG 305 0.0028 0.22 0.7
--.MNS.Z. 1997-10-17T23:01:11.16 10.0 positive manual PG 204 0.0049 -0.63 2.2
--.ASS.Z. 1997-10-17T23:01:06.88 10.0 undecidable manual PG 305 0.0028 0.11 1.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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