Earthquake with magnitude of Md 2.0 on date 02-04-1986 and time 12:39:00 (Italy) in region 6 km S Valtopina (PG)

A magnitude Md 2.0 earthquake occured in region: 6 km S Valtopina (PG), on

  • 02-04-1986 10:39:00 (UTC)
  • 02-04-1986 12:39:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43, 12.76 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
Valtopina PG 6 1398 1398
Foligno PG 7 57155 58553
Spello PG 7 8645 67198
Nocera Umbra PG 12 5839 73037
Assisi PG 14 28299 101336
Trevi PG 14 8469 109805
Cannara PG 14 4305 114110
Bevagna PG 14 5081 119191
Montefalco PG 15 5679 124870
Serravalle di Chienti MC 18 1070 125940
Bastia Umbra PG 18 21874 147814
Sellano PG 19 1079 148893
Gualdo Cattaneo PG 19 6155 155048

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km NE of Foligno (57155 inhabitants)
32 Km E of Perugia (166134 inhabitants)
50 Km N of Terni (111501 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
86 Km W of Teramo (54892 inhabitants)
88 Km SE of Arezzo (99543 inhabitants)
90 Km NW of L'Aquila (69753 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
96 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
Rev 1000 Md 2.0 1986-04-02
10:39:00
43 12.76 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 25299
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-04-02 10:39:00 ± 0.687
Latitude 43.00 ± 0.05
Longitude 12.76 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 25299

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) 5914.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 234
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.00461
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 25299
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:27:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-04-02T10:39:19.00 10.0 undecidable manual SG 15 0.0046 0.23 0.7
--.CM8.Z. 1986-04-02T10:39:11.95 10.0 undecidable manual SG 55 0.003 -1.3 0.1
--.ARV.Z. 1986-04-02T10:39:11.50 10.0 undecidable manual PG 15 0.0046 0.5 1.3
--.PRG.Z. 1986-04-02T10:39:10.00 10.0 undecidable manual SG 290 0.0025 -1.26 0.1
--.PRG.Z. 1986-04-02T10:39:07.00 10.0 undecidable manual PG 290 0.0025 0.34 1.8
--.CM8.Z. 1986-04-02T10:39:07.90 10.0 undecidable manual PG 55 0.003 0.09 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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