Earthquake with magnitude of Md 2.1 on date 31-05-1985 and time 04:40:41 (UTC) in region 2 km NE Bevagna (PG)

A magnitude Md 2.1 earthquake occured in region: 2 km NE Bevagna (PG), on

  • 31-05-1985 04:40:41 (UTC)
  • 31-05-1985 06:40:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.95, 12.62 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
Bevagna PG 2 5081 5081
Cannara PG 6 4305 9386
Gualdo Cattaneo PG 7 6155 15541
Spello PG 7 8645 24186
Montefalco PG 7 5679 29865
Foligno PG 7 57155 87020
Bettona PG 13 4367 91387
Giano dell'Umbria PG 13 3846 95233
Trevi PG 13 8469 103702
Assisi PG 14 28299 132001
Bastia Umbra PG 14 21874 153875
Castel Ritaldi PG 15 3278 157153
Collazzone PG 16 3473 160626
Deruta PG 17 9669 170295
Valtopina PG 17 1398 171693
Torgiano PG 17 6725 178418
Campello sul Clitunno PG 19 2442 180860

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km W of Foligno (57155 inhabitants)
26 Km SE of Perugia (166134 inhabitants)
43 Km N of Terni (111501 inhabitants)
72 Km NE of Viterbo (67173 inhabitants)
83 Km SE of Arezzo (99543 inhabitants)
92 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 2.1 1985-05-31
04:40:41
42.95 12.62 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 7699
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-31 04:40:41 ± 0.64
Latitude 42.95 ± 0.02
Longitude 12.62 ± 0.06
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 7699

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) 5442.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 224
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
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) 0.00097
Epicentral distance of station farthest from the epicenter (degree) 0.00534
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 7699
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:11:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM2.Z. 1985-05-31T04:40:58.10 10.0 undecidable manual SG 57 0.004 0.04 1
--.AR1.Z. 1985-05-31T04:40:55.00 10.0 undecidable manual PG 23 0.0053 1.22 0.3
--.PO9.Z. 1985-05-31T04:40:51.00 10.0 undecidable manual PG 147 0.004 0.1 1.6
--.CM2.Z. 1985-05-31T04:40:50.60 10.0 undecidable manual PG 57 0.004 -0.5 1.3
--.AS1.Z. 1985-05-31T04:40:44.00 10.0 undecidable manual PG 12 0.001 -0.86 0.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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