Earthquake with magnitude of Md 2.4 on date 22-02-1985 and time 16:48:27 (Italy) in region 4 km N Trevi (PG)

A magnitude Md 2.4 earthquake occured in region: 4 km N Trevi (PG), on

  • 22-02-1985 15:48:27 (UTC)
  • 22-02-1985 16:48:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.92, 12.75 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
Trevi PG 4 8469 8469
Foligno PG 6 57155 65624
Montefalco PG 8 5679 71303
Spello PG 11 8645 79948
Campello sul Clitunno PG 11 2442 82390
Bevagna PG 12 5081 87471
Castel Ritaldi PG 12 3278 90749
Sellano PG 15 1079 91828
Gualdo Cattaneo PG 16 6155 97983
Valtopina PG 16 1398 99381
Cannara PG 16 4305 103686
Giano dell'Umbria PG 17 3846 107532
Cerreto di Spoleto PG 18 1075 108607
Vallo di Nera PG 19 364 108971

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km SE of Foligno (57155 inhabitants)
36 Km SE of Perugia (166134 inhabitants)
41 Km N of Terni (111501 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
83 Km W of Teramo (54892 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
100 Km SW of Ancona (100861 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 2.4 1985-02-22
15:48:27
42.92 12.75 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 2199
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-22 15:48:27 ± 0.308
Latitude 42.92 ± 0.02
Longitude 12.75 ± 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 2199

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) 3748.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.00356
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 2199
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1985-02-22T15:48:42.90 10.0 undecidable manual SG 45 0.0036 0.77 0.3
--.PO9.Z. 1985-02-22T15:48:35.50 10.0 undecidable manual PG 157 0.0033 0.14 1.5
--.CM8.Z. 1985-02-22T15:48:34.80 10.0 undecidable manual PG 45 0.0036 -1.09 0.4
--.AS1.Z. 1985-02-22T15:48:34.50 10.0 undecidable manual SG 334 0.0014 0.05 1.1
--.AS1.Z. 1985-02-22T15:48:31.50 10.0 undecidable manual PG 334 0.0014 0.04 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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