Earthquake with magnitude of Md 2.2 on date 18-03-1985 and time 18:13:17 (Italy) in region 2 km SW Sorano (GR)

A magnitude Md 2.2 earthquake occured in region: 2 km SW Sorano (GR), on

  • 18-03-1985 17:13:17 (UTC)
  • 18-03-1985 18:13:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.67, 11.7 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
Pitigliano GR 4 3818 7246
Onano VT 10 995 8241
Latera VT 11 836 9077
Castell'Azzara GR 12 1476 10553
Gradoli VT 13 1353 11906
Farnese VT 13 1527 13433
Grotte di Castro VT 14 2683 16116
Ischia di Castro VT 14 2326 18442
Valentano VT 14 2868 21310
Proceno VT 15 557 21867
Semproniano GR 15 1059 22926
Acquapendente VT 16 5506 28432
San Lorenzo Nuovo VT 17 2091 30523
Manciano GR 18 7354 37877
Cellere VT 18 1188 39065
Piansano VT 20 2079 41144

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of Viterbo (67173 inhabitants)
49 Km E of Grosseto (82087 inhabitants)
64 Km N of Civitavecchia (52991 inhabitants)
74 Km SW of Perugia (166134 inhabitants)
78 Km W of Terni (111501 inhabitants)
79 Km SE of Siena (53903 inhabitants)
88 Km W of Foligno (57155 inhabitants)
90 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 2.2 1985-03-18
17:13:17
42.67 11.7 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 3359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-18 17:13:17 ± 0.501
Latitude 42.67 ± 0.02
Longitude 11.70 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3359

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) 3879
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 259
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00696
Epicentral distance of station farthest from the epicenter (degree) 0.00874
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 3359
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
--.MNS.Z. 1985-03-18T17:13:44.00 10.0 undecidable manual SG 111 0.007 -0.15 0.6
--.CH1.Z. 1985-03-18T17:13:36.50 10.0 undecidable manual PG 11 0.0087 -0.09 1.6
--.PO9.Z. 1985-03-18T17:13:35.00 10.0 undecidable manual PG? 96 0.0082 -0.48 0.1
--.MNS.Z. 1985-03-18T17:13:33.00 10.0 undecidable manual PG 111 0.007 0.16 1.4
--.AS1.Z. 1985-03-18T17:13:33.50 10.0 undecidable manual PG 60 0.0071 0.17 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download