Earthquake with magnitude of Md 2.4 on date 13-07-1985 and time 10:26:40 (Italy) in region 7 km W Sefro (MC)

A magnitude Md 2.4 earthquake occured in region: 7 km W Sefro (MC), on

  • 13-07-1985 08:26:40 (UTC)
  • 13-07-1985 10:26:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.12, 12.88 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
Sefro MC 7 422 422
Nocera Umbra PG 7 5839 6261
Serravalle di Chienti MC 8 1070 7331
Fiuminata MC 9 1402 8733
Pioraco MC 11 1134 9867
Valtopina PG 12 1398 11265
Muccia MC 14 915 12180
Gualdo Tadino PG 15 15208 27388
Camerino MC 16 6974 34362
Esanatoglia MC 16 2034 36396
Pieve Torina MC 16 1458 37854
Monte Cavallo MC 17 145 37999
Pievebovigliana MC 18 866 38865
Castelraimondo MC 18 4587 43452
Matelica MC 19 9981 53433
Fiordimonte MC 20 202 53635

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Foligno (57155 inhabitants)
40 Km E of Perugia (166134 inhabitants)
65 Km N of Terni (111501 inhabitants)
76 Km SW of Ancona (100861 inhabitants)
82 Km S of Fano (60888 inhabitants)
85 Km NW of Teramo (54892 inhabitants)
88 Km S of Pesaro (94582 inhabitants)
89 Km E of Arezzo (99543 inhabitants)
95 Km NW of L'Aquila (69753 inhabitants)
100 Km NE of Viterbo (67173 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 1985-07-13
08:26:40
43.12 12.88 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 10069
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-13 08:26:40 ± 0.233
Latitude 43.12 ± 0.02
Longitude 12.88 ± 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 10069

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) 2377.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.00672
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 2
Type of magnitude Md
Reference to an origin 10069
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:13:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1985-07-13T08:27:07.50 10.0 undecidable manual SG 191 0.0067 1.34 0.1
--.ALP.Z. 1985-07-13T08:27:02.40 10.0 undecidable manual SG 123 0.0054 0.73 0.5
--.MNS.Z. 1985-07-13T08:26:56.00 10.0 undecidable manual PG 191 0.0067 0.78 0.9
--.AR1.Z. 1985-07-13T08:26:54.70 10.0 undecidable manual SG 6 0.0034 0.21 0.8
--.AM1.Z. 1985-07-13T08:26:54.30 10.0 undecidable manual PG 50 0.0061 0.29 1.6
--.ALP.Z. 1985-07-13T08:26:51.60 10.0 undecidable manual PG 123 0.0054 -1.03 0.7
--.PO9.Z. 1985-07-13T08:26:50.50 10.0 undecidable manual PG 174 0.0049 -0.99 0.8
--.CM2.Z. 1985-07-13T08:26:49.60 10.0 undecidable manual SG 68 0.0018 0.77 0.7
--.AR1.Z. 1985-07-13T08:26:48.00 10.0 undecidable manual PG 6 0.0034 -0.48 1.7
--.AS1.Z. 1985-07-13T08:26:48.50 10.0 undecidable manual SG 251 0.0015 0.74 0.5
--.AS1.Z. 1985-07-13T08:26:44.00 10.0 undecidable manual PG 251 0.0015 -0.6 1.6
--.CM2.Z. 1985-07-13T08:26:44.90 10.0 undecidable manual PG 68 0.0018 -0.31 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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