Earthquake with magnitude of Md 2.1 on date 21-06-1985 and time 00:11:25 (Italy) in region 8 km E Foligno (PG)

A magnitude Md 2.1 earthquake occured in region: 8 km E Foligno (PG), on

  • 20-06-1985 22:11:25 (UTC)
  • 21-06-1985 00:11:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.98, 12.8 at 13 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
Foligno PG 8 57155 57155
Valtopina PG 10 1398 58553
Spello PG 11 8645 67198
Trevi PG 12 8469 75667
Sellano PG 14 1079 76746
Nocera Umbra PG 15 5839 82585
Montefalco PG 15 5679 88264
Serravalle di Chienti MC 16 1070 89334
Bevagna PG 16 5081 94415
Monte Cavallo MC 17 145 94560
Cannara PG 18 4305 98865
Campello sul Clitunno PG 18 2442 101307
Assisi PG 18 28299 129606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km E of Foligno (57155 inhabitants)
36 Km E of Perugia (166134 inhabitants)
48 Km N of Terni (111501 inhabitants)
82 Km W of Teramo (54892 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
85 Km NW of L'Aquila (69753 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
92 Km SE of Arezzo (99543 inhabitants)
98 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 2.1 1985-06-20
22:11:25
42.98 12.8 13 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 8799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-20 22:11:25 ± 0.557
Latitude 42.98 ± 0.02
Longitude 12.80 ± 0.03
Depth (km) 13 ± 9 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 8799

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) 3163.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
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) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.00729
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 8799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:12:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AM1.Z. 1985-06-20T22:11:55.30 10.0 undecidable manual SG 45 0.0073 1.2 0
--.ALP.Z. 1985-06-20T22:11:46.90 10.0 undecidable manual SG 109 0.0053 -0.09 0.8
--.AM1.Z. 1985-06-20T22:11:42.40 10.0 undecidable manual PG 45 0.0073 0.21 1.1
--.CM2.Z. 1985-06-20T22:11:38.20 10.0 undecidable manual SG 49 0.0029 -0.23 0.8
--.ALP.Z. 1985-06-20T22:11:38.30 10.0 undecidable manual PG 109 0.0053 0.21 1.3
--.AR1.Z. 1985-06-20T22:11:36.50 10.0 undecidable manual PG 11 0.0047 -0.36 1.2
--.CM2.Z. 1985-06-20T22:11:32.50 10.0 positive manual PG 49 0.0029 -0.65 1.4
--.AS1.Z. 1985-06-20T22:11:30.00 10.0 undecidable manual PG 307 0.0012 0.24 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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