Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 30-09-1997 and time 10:31:16 (UTC) in region 4 km NW Monte Cavallo (MC)

A magnitude Md 2.5 earthquake occured in region: 4 km NW Monte Cavallo (MC), on

  • 30-09-1997 10:31:16 (UTC)
  • 30-09-1997 12:31:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0180, 12.9620 at 2 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
Monte Cavallo MC 4 145 145
Serravalle di Chienti MC 6 1070 1215
Pieve Torina MC 8 1458 2673
Muccia MC 10 915 3588
Fiordimonte MC 11 202 3790
Pievebovigliana MC 11 866 4656
Visso MC 14 1107 5763
Sefro MC 14 422 6185
Sellano PG 15 1079 7264
Camerino MC 16 6974 14238
Fiastra MC 16 559 14797
Ussita MC 17 444 15241
Preci PG 17 724 15965
Nocera Umbra PG 17 5839 21804
Valtopina PG 17 1398 23202
Acquacanina MC 17 121 23323
Pioraco MC 18 1134 24457
Fiuminata MC 19 1402 25859

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
48 Km E of Perugia (166134 inhabitants)
57 Km NE of Terni (111501 inhabitants)
73 Km NW of Teramo (54892 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
92 Km S of Fano (60888 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
99 Km S of Pesaro (94582 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 		1997-09-30
10:31:16		 43.018 12.962 2 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 285539
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-30 10:31:16 ± 0.274
Latitude 43.0180 ± 0.0097
Longitude 12.9620 ± 0.0186
Depth (km) 2 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 285539

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) 1857.9
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 16
Number of defining phases 16
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) 0.00202
Epicentral distance of station farthest from the epicenter (degree) 0.01303
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 285539
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:29:11

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 285539
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
--.SFI.Z. 1997-09-30T10:31:57.95 10.0 undecidable manual SN 317 1.1988 0.28 0.6
--.CRE.Z. 1997-09-30T10:31:50.74 10.0 undecidable manual SG 309 0.9435 0.29 0.7
--.AQU.Z. 1997-09-30T10:31:44.30 10.0 undecidable manual SG 153 0.7326 0.61 0.5
--.SDI.Z. 1997-09-30T10:31:44.36 10.0 undecidable manual PN 153 1.443 0.59 0.9
--.CSNT.Z. 1997-09-30T10:31:42.16 10.0 undecidable manual PN 290 1.2987 0.5 1.1
--.FB9.Z. 1997-09-30T10:31:41.50 10.0 undecidable manual SG 348 0.6882 -0.52 0.6
--.SFI.Z. 1997-09-30T10:31:40.80 10.0 undecidable manual PN 317 1.1988 0.5 1.2
--.MNS.Z. 1997-09-30T10:31:39.78 10.0 undecidable manual SG 197 0.666 -1.57 0
--.ARV.Z. 1997-09-30T10:31:35.41 10.0 undecidable manual SG 358 0.4773 0.32 0.8
--.CRE.Z. 1997-09-30T10:31:35.60 10.0 undecidable manual PG 309 0.9435 -0.53 1.3
--.AQU.Z. 1997-09-30T10:31:32.50 10.0 undecidable manual PG 153 0.7326 0.27 2
--.MNS.Z. 1997-09-30T10:31:30.20 10.0 undecidable manual PG 197 0.666 -0.68 1.1
--.FB9.Z. 1997-09-30T10:31:30.57 10.0 undecidable manual PG 348 0.6882 -0.69 1.1
--.ARV.Z. 1997-09-30T10:31:26.96 10.0 undecidable manual PG 358 0.4773 -0.3 1.9
--.ASS.Z. 1997-09-30T10:31:25.86 10.0 undecidable manual SG 280 0.222 0.39 0.7
--.ASS.Z. 1997-09-30T10:31:22.14 10.0 undecidable manual PG 280 0.222 0.43 1.6
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