Earthquake with magnitude of Md 2.5 on date 31-05-1985 and time 16:19:02 (UTC) in region 1 km NE Bevagna (PG)

A magnitude Md 2.5 earthquake occured in region: 1 km NE Bevagna (PG), on

  • 31-05-1985 16:19:02 (UTC)
  • 31-05-1985 18:19:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.94, 12.62 at 7 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
Bevagna PG 1 5081 5081
Montefalco PG 6 5679 10760
Gualdo Cattaneo PG 6 6155 16915
Cannara PG 7 4305 21220
Foligno PG 7 57155 78375
Spello PG 7 8645 87020
Giano dell'Umbria PG 12 3846 90866
Trevi PG 13 8469 99335
Bettona PG 14 4367 103702
Castel Ritaldi PG 14 3278 106980
Assisi PG 14 28299 135279
Bastia Umbra PG 15 21874 157153
Collazzone PG 16 3473 160626
Deruta PG 17 9669 170295
Valtopina PG 17 1398 171693
Torgiano PG 18 6725 178418
Campello sul Clitunno PG 19 2442 180860
Massa Martana PG 20 3770 184630

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km W of Foligno (57155 inhabitants)
26 Km SE of Perugia (166134 inhabitants)
42 Km N of Terni (111501 inhabitants)
72 Km NE of Viterbo (67173 inhabitants)
84 Km SE of Arezzo (99543 inhabitants)
91 Km NW of L'Aquila (69753 inhabitants)
94 Km W of Teramo (54892 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 2.5 1985-05-31
16:19:02
42.94 12.62 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 7739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-31 16:19:02 ± 0.304
Latitude 42.94 ± 0.01
Longitude 12.62 ± 0.03
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 7739

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) 2515
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.00842
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 7739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:11:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AM1.Z. 1985-05-31T16:19:36.30 10.0 undecidable manual SG 49 0.0084 0.77 0.3
--.ALP.Z. 1985-05-31T16:19:28.70 10.0 undecidable manual SG 102 0.0064 0.43 0.7
--.AR1.Z. 1985-05-31T16:19:25.00 10.0 undecidable manual SG 22 0.0054 0.21 0.6
--.AM1.Z. 1985-05-31T16:19:21.50 10.0 undecidable manual PG 49 0.0084 -0.26 1.1
--.CH1.Z. 1985-05-31T16:19:20.50 10.0 undecidable manual PG 324 0.0075 0.52 0.9
--.CM2.Z. 1985-05-31T16:19:20.00 10.0 undecidable manual SG 56 0.004 -0.04 1
--.PO9.Z. 1985-05-31T16:19:19.00 10.0 undecidable manual SG 147 0.0039 -0.43 0.5
--.ALP.Z. 1985-05-31T16:19:18.80 10.0 undecidable manual PG 102 0.0064 1.24 0.2
--.AR1.Z. 1985-05-31T16:19:15.00 10.0 undecidable manual PG 22 0.0054 -0.55 1
--.PO9.Z. 1985-05-31T16:19:12.00 10.0 undecidable manual PG 147 0.0039 -0.46 1.2
--.CM2.Z. 1985-05-31T16:19:12.10 10.0 positive manual PG 56 0.004 -0.71 1.6
--.AS1.Z. 1985-05-31T16:19:07.80 10.0 undecidable manual SG 10 0.0011 -0.44 0.8
--.AS1.Z. 1985-05-31T16:19:06.30 10.0 positive manual PG 10 0.0011 0.3 3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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