Earthquake with magnitude of Md 2.5 on date 18-03-1985 and time 01:39:38 (Italy) in region 2 km NE Sorano (GR)

A magnitude Md 2.5 earthquake occured in region: 2 km NE Sorano (GR), on

  • 18-03-1985 00:39:38 (UTC)
  • 18-03-1985 01:39:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7, 11.74 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
Sorano GR 2 3428 3428
Onano VT 6 995 4423
Pitigliano GR 9 3818 8241
Castell'Azzara GR 9 1476 9717
Proceno VT 10 557 10274
Latera VT 11 836 11110
Grotte di Castro VT 11 2683 13793
Gradoli VT 11 1353 15146
Acquapendente VT 12 5506 20652
San Lorenzo Nuovo VT 14 2091 22743
Valentano VT 15 2868 25611
Farnese VT 16 1527 27138
Semproniano GR 17 1059 28197
Ischia di Castro VT 17 2326 30523
Piancastagnaio SI 18 4230 34753
Santa Fiora GR 20 2622 37375
Castel Giorgio TR 20 2131 39506

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of Viterbo (67173 inhabitants)
52 Km E of Grosseto (82087 inhabitants)
67 Km N of Civitavecchia (52991 inhabitants)
70 Km SW of Perugia (166134 inhabitants)
76 Km W of Terni (111501 inhabitants)
77 Km SE of Siena (53903 inhabitants)
84 Km W of Foligno (57155 inhabitants)
87 Km S of Arezzo (99543 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 2.5 1985-03-18
00:39:38
42.7 11.74 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3349
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-18 00:39:38 ± 1.109
Latitude 42.70 ± 0.04
Longitude 11.74 ± 0.10
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3349

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) 9482.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 255
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.0068
Epicentral distance of station farthest from the epicenter (degree) 0.01141
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 3349
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AR1.Z. 1985-03-18T00:40:18.00 10.0 undecidable manual SN 47 0.0107 1.15 0.1
--.CH1.Z. 1985-03-18T00:40:10.00 10.0 undecidable manual SG 9 0.0084 -0.28 0.7
--.MNS.Z. 1985-03-18T00:40:03.50 10.0 undecidable manual SG 114 0.0068 -0.89 0.3
--.AQU.Z. 1985-03-18T00:40:02.50 10.0 undecidable manual PN 105 0.0114 0.91 0.6
--.AR1.Z. 1985-03-18T00:40:00.00 10.0 undecidable manual PN 47 0.0107 -0.46 1.4
--.CH1.Z. 1985-03-18T00:39:56.50 10.0 undecidable manual PG 9 0.0084 -0.17 2
--.MNS.Z. 1985-03-18T00:39:53.00 10.0 undecidable manual PG 114 0.0068 -0.27 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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