Earthquake with magnitude of Md 2.5 on date 07-10-1997 and time 20:35:38 (Italy) in region 6 km SW Monte Cavallo (MC)

A magnitude Md 2.5 earthquake occured in region: 6 km SW Monte Cavallo (MC), on

  • 07-10-1997 18:35:38 (UTC)
  • 07-10-1997 20:35:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9650, 12.9410 at 5 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
Monte Cavallo MC 6 145 145
Sellano PG 8 1079 1224
Serravalle di Chienti MC 12 1070 2294
Preci PG 12 724 3018
Visso MC 13 1107 4125
Pieve Torina MC 13 1458 5583
Fiordimonte MC 15 202 5785
Muccia MC 16 915 6700
Pievebovigliana MC 16 866 7566
Cerreto di Spoleto PG 16 1075 8641
Ussita MC 16 444 9085
Trevi PG 18 8469 17554
Valtopina PG 18 1398 18952
Castelsantangelo sul Nera MC 19 281 19233
Foligno PG 19 57155 76388
Fiastra MC 19 559 76947

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
51 Km NE of Terni (111501 inhabitants)
71 Km W of Teramo (54892 inhabitants)
78 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
98 Km S of Fano (60888 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 2.5
ML-VAX 1.9
1997-10-07
18:35:38
42.965 12.941 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 292599
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-10-07 18:35:38 ± 0.151
Latitude 42.9650 ± 0.0061
Longitude 12.9410 ± 0.0149
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 292599

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) 1385.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.00874
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 292599
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:35:25

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 292599
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(km) Takeoff_angle Residual Weight
--.CRE.Z. 1997-10-07T18:36:11.93 10.0 undecidable manual SG 312 0.9657 -0.39 0.3
--.FB9.Z. 1997-10-07T18:36:05.28 10.0 undecidable manual SG 350 0.7326 0.56 0.1
--.MNS.Z. 1997-10-07T18:36:01.10 10.0 undecidable manual SG 198 0.5994 0.3 0.5
--.ARV.Z. 1997-10-07T18:35:58.65 10.0 undecidable manual SG 0 0.5328 0.44 0.3
--.CRE.Z. 1997-10-07T18:35:57.80 10.0 undecidable manual PG 312 0.9657 -0.12 1.6
--.FB9.Z. 1997-10-07T18:35:53.21 10.0 undecidable manual PG 350 0.7326 -0.31 1.2
--.MNS.Z. 1997-10-07T18:35:51.11 10.0 undecidable manual PG 198 0.5994 -0.1 2.2
--.ARV.Z. 1997-10-07T18:35:49.63 10.0 undecidable manual PG 0 0.5328 -0.13 2.1
--.ASS.Z. 1997-10-07T18:35:47.11 10.0 undecidable manual SG 294 0.222 -0.23 0.7
--.ASS.Z. 1997-10-07T18:35:43.86 10.0 undecidable manual PG 294 0.222 0.38 1
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download