Earthquake with magnitude of Md 2.1 on date 24-09-1987 and time 00:00:08 (UTC) in region 2 km NW Monte Cavallo (MC)

A magnitude Md 2.1 earthquake occured in region: 2 km NW Monte Cavallo (MC), on

  • 24-09-1987 00:00:08 (UTC)
  • 24-09-1987 02:00:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.01, 12.98 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
Pieve Torina MC 7 1458 1603
Serravalle di Chienti MC 8 1070 2673
Fiordimonte MC 10 202 2875
Muccia MC 10 915 3790
Pievebovigliana MC 11 866 4656
Visso MC 12 1107 5763
Sellano PG 14 1079 6842
Ussita MC 15 444 7286
Fiastra MC 15 559 7845
Preci PG 15 724 8569
Sefro MC 16 422 8991
Camerino MC 16 6974 15965
Acquacanina MC 16 121 16086
Castelsantangelo sul Nera MC 19 281 16367
Valtopina PG 19 1398 17765
Nocera Umbra PG 19 5839 23604
Pioraco MC 19 1134 24738

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)
71 Km NW of Teramo (54892 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
93 Km S of Fano (60888 inhabitants)
97 Km NE of Viterbo (67173 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 2.1 1987-09-24
00:00:08
43.01 12.98 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 56019
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-24 00:00:08 ± 0.211
Latitude 43.01 ± 0.01
Longitude 12.98 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 56019

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) 2287.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.00591
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 56019
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:53:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1987-09-24T00:00:31.80 10.0 undecidable manual SG 199 0.0059 0.24 0.5
--.ARV.Z. 1987-09-24T00:00:26.12 10.0 undecidable manual SG 357 0.0044 -0.02 0.6
--.MNS.Z. 1987-09-24T00:00:21.50 10.0 undecidable manual PG 199 0.0059 -0.3 1
--.PRG.Z. 1987-09-24T00:00:19.00 10.0 undecidable manual PG 282 0.0039 1.38 0.1
--.ARV.Z. 1987-09-24T00:00:18.31 10.0 undecidable manual PG 357 0.0044 -0.36 1
--.CM8.Z. 1987-09-24T00:00:17.38 10.0 undecidable manual SG 33 0.0019 -0.13 1
--.ASS.Z. 1987-09-24T00:00:17.85 10.0 undecidable manual SG 283 0.0022 -0.36 0.2
--.ASS.Z. 1987-09-24T00:00:14.10 10.0 undecidable manual PG 283 0.0022 0.01 1.5
--.CM8.Z. 1987-09-24T00:00:13.83 10.0 undecidable manual PG 33 0.0019 0.14 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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