Earthquake with magnitude of Md 2.4 on date 07-05-1991 and time 05:21:08 (Italy) in region 3 km NW Monte Cavallo (MC)

A magnitude Md 2.4 earthquake occured in region: 3 km NW Monte Cavallo (MC), on

  • 07-05-1991 03:21:08 (UTC)
  • 07-05-1991 05:21:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.01, 12.97 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.

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 3 145 145
Serravalle di Chienti MC 7 1070 1215
Pieve Torina MC 7 1458 2673
Muccia MC 10 915 3588
Fiordimonte MC 10 202 3790
Pievebovigliana MC 11 866 4656
Visso MC 13 1107 5763
Sellano PG 14 1079 6842
Sefro MC 15 422 7264
Fiastra MC 15 559 7823
Ussita MC 16 444 8267
Camerino MC 16 6974 15241
Preci PG 16 724 15965
Acquacanina MC 17 121 16086
Nocera Umbra PG 18 5839 21925
Valtopina PG 18 1398 23323
Pioraco MC 19 1134 24457
Castelsantangelo sul Nera MC 20 281 24738
Fiuminata MC 20 1402 26140

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
49 Km E of Perugia (166134 inhabitants)
57 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
93 Km S of Fano (60888 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
100 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
Rev 1000 Md 2.4
ML-VAX 1.5
1991-05-07
03:21:08
43.01 12.97 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 140659
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-05-07 03:21:08 ± 0.231
Latitude 43.01 ± 0.01
Longitude 12.97 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 140659

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) 3266.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00437
Epicentral distance of station farthest from the epicenter (degree) 0.00858
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 140659
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:11:20

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 140659
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
--.CRE.Z. 1991-05-07T03:21:42.54 10.0 undecidable manual SG 309 0.0086 0.94 0.1
--.AQU.Z. 1991-05-07T03:21:33.75 10.0 undecidable manual SG 154 0.0066 -0.53 0.4
--.MNS.Z. 1991-05-07T03:21:31.44 10.0 undecidable manual SG 198 0.0059 -0.68 0.3
--.CRE.Z. 1991-05-07T03:21:27.74 10.0 undecidable manual PG 309 0.0086 -0.05 1.5
--.ARV.Z. 1991-05-07T03:21:26.31 10.0 undecidable manual SG 357 0.0044 -0.12 0.7
--.AQU.Z. 1991-05-07T03:21:24.45 10.0 undecidable manual PG 154 0.0066 0.89 0.3
--.MNS.Z. 1991-05-07T03:21:22.11 10.0 undecidable manual PG 198 0.0059 -0.2 1.6
--.ARV.Z. 1991-05-07T03:21:18.79 10.0 positive manual PG 357 0.0044 -0.24 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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