Earthquake with magnitude of Md 2.3 on date 05-03-1986 and time 16:17:45 (Italy) in region 2 km NW Bastia Umbra (PG)

A magnitude Md 2.3 earthquake occured in region: 2 km NW Bastia Umbra (PG), on

  • 05-03-1986 15:17:45 (UTC)
  • 05-03-1986 16:17:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0870, 12.5400 at 20 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
Bastia Umbra PG 2 21874 21874
Assisi PG 6 28299 50173
Bettona PG 9 4367 54540
Valfabbrica PG 10 3389 57929
Cannara PG 11 4305 62234
Torgiano PG 11 6725 68959
Perugia PG 13 166134 235093
Spello PG 15 8645 243738
Deruta PG 15 9669 253407
Valtopina PG 18 1398 254805
Bevagna PG 18 5081 259886
Gualdo Cattaneo PG 20 6155 266041
Foligno PG 20 57155 323196

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km E of Perugia (166134 inhabitants)
20 Km NW of Foligno (57155 inhabitants)
59 Km N of Terni (111501 inhabitants)
68 Km SE of Arezzo (99543 inhabitants)
82 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Fano (60888 inhabitants)
97 Km SW of Pesaro (94582 inhabitants)
99 Km SW of Ancona (100861 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 2.3 1986-03-05
15:17:45
43.087 12.54 20 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 23689
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-03-05 15:17:45 ± 0.429
Latitude 43.0870 ± 0.0163
Longitude 12.5400 ± 0.0290
Depth (km) 20 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 23689

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) 2972.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00073
Epicentral distance of station farthest from the epicenter (degree) 0.00631
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 23689
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:25:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.MNS.Z. 1986-03-05T15:18:11.00 10.0 undecidable manual SG 171 0.6993 0.91 0.1
--.ARV.Z. 1986-03-05T15:18:03.80 10.0 undecidable manual SG 35 0.4995 0.14 0.7
--.MNS.Z. 1986-03-05T15:17:59.00 10.0 undecidable manual PG 171 0.6993 -0.55 0.8
--.ARV.Z. 1986-03-05T15:17:55.80 10.0 undecidable manual PG 35 0.4995 -0.05 1.9
--.PRG.Z. 1986-03-05T15:17:53.00 10.0 undecidable manual SG 277 0.0999 0.45 0.6
--.ASS.Z. 1986-03-05T15:17:51.50 10.0 undecidable manual SG 106 0.0777 -0.73 0.3
--.ASS.Z. 1986-03-05T15:17:49.50 10.0 undecidable manual PG 106 0.0777 0.26 2
--.PRG.Z. 1986-03-05T15:17:49.00 10.0 undecidable manual PG 277 0.0999 -0.43 1.5
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