Earthquake with magnitude of Md 2.2 on date 14-02-1985 and time 23:43:17 (Italy) in region 3 km W Montefalco (PG)

A magnitude Md 2.2 earthquake occured in region: 3 km W Montefalco (PG), on

  • 14-02-1985 22:43:17 (UTC)
  • 14-02-1985 23:43:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.89, 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
Montefalco PG 3 5679 5679
Bevagna PG 5 5081 10760
Gualdo Cattaneo PG 5 6155 16915
Giano dell'Umbria PG 7 3846 20761
Castel Ritaldi PG 9 3278 24039
Foligno PG 11 57155 81194
Trevi PG 11 8469 89663
Cannara PG 12 4305 93968
Spello PG 13 8645 102613
Collazzone PG 14 3473 106086
Massa Martana PG 14 3770 109856
Campello sul Clitunno PG 15 2442 112298
Bettona PG 18 4367 116665
Deruta PG 19 9669 126334
Spoleto PG 20 38218 164552

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SW of Foligno (57155 inhabitants)
31 Km SE of Perugia (166134 inhabitants)
36 Km N of Terni (111501 inhabitants)
67 Km NE of Viterbo (67173 inhabitants)
88 Km NW of L'Aquila (69753 inhabitants)
88 Km SE of Arezzo (99543 inhabitants)
93 Km W of Teramo (54892 inhabitants)
99 Km N of Guidonia Montecelio (88673 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 2.2
M 2.2
1985-02-14
22:43:17
42.89 12.62 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 1739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-14 22:43:17 ± 0.194
Latitude 42.89 ± 0.01
Longitude 12.62 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1739

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) 1859.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.00453
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 1739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:47

M:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 1739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:50:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1985-02-14T22:43:35.00 10.0 undecidable manual SG 174 0.0045 -0.3 0.5
--.CM8.Z. 1985-02-14T22:43:35.00 10.0 undecidable manual SG 51 0.0044 0.02 1.1
--.PO9.Z. 1985-02-14T22:43:31.50 10.0 undecidable manual SG 142 0.0035 -0.27 0.5
--.CM8.Z. 1985-02-14T22:43:28.10 10.0 undecidable manual PG 51 0.0044 0.63 0.5
--.MNS.Z. 1985-02-14T22:43:28.00 10.0 undecidable manual PG 174 0.0045 0.35 1.2
--.PO9.Z. 1985-02-14T22:43:25.50 10.0 undecidable manual PG 142 0.0035 -0.11 1.9
--.AS1.Z. 1985-02-14T22:43:24.30 10.0 undecidable manual SG 8 0.0015 -0.52 0.2
--.AS1.Z. 1985-02-14T22:43:21.50 10.0 undecidable manual PG 8 0.0015 -0.1 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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