Earthquake with magnitude of Md 2.6 on date 02-08-1985 and time 19:25:24 (Italy) in region 6 km S Monte Cavallo (MC)

A magnitude Md 2.6 earthquake occured in region: 6 km S Monte Cavallo (MC), on

  • 02-08-1985 17:25:24 (UTC)
  • 02-08-1985 19:25:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.94, 12.98 at 6 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 7 1079 1224
Preci PG 8 724 1948
Visso MC 9 1107 3055
Ussita MC 13 444 3499
Pieve Torina MC 13 1458 4957
Fiordimonte MC 14 202 5159
Cerreto di Spoleto PG 15 1075 6234
Castelsantangelo sul Nera MC 15 281 6515
Serravalle di Chienti MC 15 1070 7585
Pievebovigliana MC 16 866 8451
Muccia MC 17 915 9366
Fiastra MC 18 559 9925
Acquacanina MC 19 121 10046
Norcia PG 19 4957 15003

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
52 Km E of Perugia (166134 inhabitants)
67 Km W of Teramo (54892 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
92 Km NE of Viterbo (67173 inhabitants)
101 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 2.6 1985-08-02
17:25:24
42.94 12.98 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11239
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-02 17:25:24 ± 0.157
Latitude 42.94 ± 0.01
Longitude 12.98 ± 0.02
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11239

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) 1507
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00243
Epicentral distance of station farthest from the epicenter (degree) 0.00915
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 11239
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-08-02T17:25:46.00 10.0 undecidable manual PG 312 0.0091 1.24 0.1
--.MNS.Z. 1985-08-02T17:25:45.50 10.0 undecidable manual SG 201 0.0053 -0.73 0.2
--.AR1.Z. 1985-08-02T17:25:44.50 10.0 undecidable manual SG 356 0.0049 -0.39 0.5
--.ALP.Z. 1985-08-02T17:25:42.30 10.0 undecidable manual SG 110 0.004 0.66 0.5
--.PO9.Z. 1985-08-02T17:25:39.00 10.0 undecidable manual SG 184 0.0032 0.32 0.6
--.MNS.Z. 1985-08-02T17:25:36.70 10.0 undecidable manual PG 201 0.0053 -0.28 1.3
--.CM2.Z. 1985-08-02T17:25:35.10 10.0 undecidable manual SG 24 0.0024 -0.08 1
--.AR1.Z. 1985-08-02T17:25:35.80 10.0 undecidable manual PG 356 0.0049 -0.4 1.1
--.AS1.Z. 1985-08-02T17:25:35.50 10.0 undecidable manual SG 296 0.0024 0.52 0.4
--.ALP.Z. 1985-08-02T17:25:34.60 10.0 undecidable manual PG 110 0.004 0.27 1.5
--.PO9.Z. 1985-08-02T17:25:32.50 10.0 undecidable manual PG 184 0.0032 -0.11 1.7
--.AS1.Z. 1985-08-02T17:25:30.00 10.0 undecidable manual PG 296 0.0024 -0.48 1.1
--.CM2.Z. 1985-08-02T17:25:30.40 10.0 positive manual PG 24 0.0024 -0.2 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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