Earthquake with magnitude of Md 2.4 on date 09-07-1985 and time 23:10:27 (Italy) in region 7 km NE Trevi (PG)

A magnitude Md 2.4 earthquake occured in region: 7 km NE Trevi (PG), on

  • 09-07-1985 21:10:27 (UTC)
  • 09-07-1985 23:10:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.93, 12.8 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 7 8469 8469
Foligno PG 8 57155 65624
Sellano PG 12 1079 66703
Campello sul Clitunno PG 12 2442 69145
Montefalco PG 12 5679 74824
Spello PG 12 8645 83469
Bevagna PG 15 5081 88550
Valtopina PG 15 1398 89948
Castel Ritaldi PG 15 3278 93226
Cerreto di Spoleto PG 16 1075 94301
Vallo di Nera PG 18 364 94665
Monte Cavallo MC 18 145 94810
Cannara PG 19 4305 99115
Gualdo Cattaneo PG 20 6155 105270

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km E of Foligno (57155 inhabitants)
39 Km SE of Perugia (166134 inhabitants)
42 Km N of Terni (111501 inhabitants)
80 Km NE of Viterbo (67173 inhabitants)
80 Km W of Teramo (54892 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
97 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
Bulletin
Rev1000
Md 2.4 1985-07-09
21:10:27
42.93 12.8 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 9929
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-09 21:10:27 ± 0.151
Latitude 42.93 ± 0.01
Longitude 12.80 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 9929

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) 1310.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.00769
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 9929
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:13:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ALP.Z. 1985-07-09T21:10:48.20 10.0 undecidable manual SG 104 0.0052 -0.19 0.9
--.AM1.Z. 1985-07-09T21:10:45.00 10.0 undecidable manual PG 42 0.0077 0.3 1.1
--.CM2.Z. 1985-07-09T21:10:41.50 10.0 undecidable manual SG 43 0.0032 0.08 1.1
--.PO9.Z. 1985-07-09T21:10:41.00 10.0 undecidable manual SG 162 0.0032 -0.45 0.4
--.ALP.Z. 1985-07-09T21:10:40.30 10.0 undecidable manual PG 104 0.0052 0.64 0.7
--.AR1.Z. 1985-07-09T21:10:40.00 10.0 undecidable manual PG? 10 0.0052 0.4 0.5
--.MNS.Z. 1985-07-09T21:10:39.50 10.0 undecidable manual PG 188 0.0049 0.52 0.9
--.PO9.Z. 1985-07-09T21:10:35.00 10.0 undecidable manual PG 162 0.0032 -0.65 0.6
--.CM2.Z. 1985-07-09T21:10:35.10 10.0 positive manual PG 43 0.0032 -0.53 1.7
--.AS1.Z. 1985-07-09T21:10:35.00 10.0 undecidable manual SG 322 0.0015 -0.13 1.1
--.AS1.Z. 1985-07-09T21:10:32.00 10.0 undecidable manual PG 322 0.0015 0 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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