Earthquake with magnitude of Md 3.1 on date 07-12-1985 and time 17:18:33 (Italy) in region 9 km W Verghereto (FC)

A magnitude Md 3.1 earthquake occured in region: 9 km W Verghereto (FC), on

  • 07-12-1985 16:18:33 (UTC)
  • 07-12-1985 17:18:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.8, 11.89 at 7 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
Verghereto FC 10 1907 1907
Bagno di Romagna FC 10 6026 7933
Chiusi della Verna AR 12 2023 9956
Poppi AR 13 6160 16116
Bibbiena AR 13 12241 28357
Pratovecchio Stia AR 13 5845 34202
Chitignano AR 15 899 35101
Castel San Niccolò AR 16 2707 37808
Castel Focognano AR 17 3149 40957
Santa Sofia FC 17 4136 45093
Ortignano Raggiolo AR 17 878 45971
Caprese Michelangelo AR 19 1426 47397
Pieve Santo Stefano AR 19 3183 50580

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km N of Arezzo (99543 inhabitants)
47 Km SW of Cesena (96758 inhabitants)
49 Km S of Forlì (117913 inhabitants)
51 Km E of Firenze (382808 inhabitants)
54 Km S of Faenza (58541 inhabitants)
57 Km E of Scandicci (50609 inhabitants)
62 Km W of Rimini (147750 inhabitants)
63 Km S of Imola (69797 inhabitants)
64 Km E of Prato (191150 inhabitants)
70 Km NE of Siena (53903 inhabitants)
73 Km SW of Ravenna (159116 inhabitants)
79 Km E of Pistoia (90315 inhabitants)
83 Km W of Pesaro (94582 inhabitants)
87 Km NW of Perugia (166134 inhabitants)
89 Km SE of Bologna (386663 inhabitants)
91 Km W of Fano (60888 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 3.1 1985-12-07
16:18:33
43.8 11.89 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 17559
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-07 16:18:33 ± 0.432
Latitude 43.80 ± 0.02
Longitude 11.89 ± 0.03
Depth (km) 7 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 17559

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) 3389
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.02598
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 17559
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:20:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1985-12-07T16:19:52.00 10.0 undecidable manual SN 23 0.026 -1.53 0.1
--.CTI.Z. 1985-12-07T16:19:38.00 10.0 undecidable manual SN 355 0.0202 -0.32 0.5
--.RBL.Z. 1985-12-07T16:19:19.00 10.0 undecidable manual PN 23 0.026 -0.7 0.7
--.FO1.Z. 1985-12-07T16:19:19.50 10.0 undecidable manual PN 12 0.0257 0.21 1.1
--.TRI.Z. 1985-12-07T16:19:12.00 10.0 undecidable manual PN 34 0.0209 0.08 1.3
--.CM2.Z. 1985-12-07T16:19:12.11 10.0 undecidable manual SN 123 0.0098 1.46 0.1
--.CTI.Z. 1985-12-07T16:19:11.50 10.0 undecidable manual PN 355 0.0202 0.57 1
--.SAL.Z. 1985-12-07T16:19:09.50 10.0 undecidable manual PN 332 0.0185 1.37 0.2
--.ASS.Z. 1985-12-07T16:19:06.50 10.0 undecidable manual SG 142 0.0083 1.04 0.2
--.AQU.Z. 1985-12-07T16:19:05.50 10.0 undecidable manual PN 142 0.0164 0.59 1.1
--.ARV.Z. 1985-12-07T16:19:01.00 10.0 undecidable manual SG 111 0.0074 -1.21 0.2
--.MNS.Z. 1985-12-07T16:19:00.00 10.0 undecidable manual PN 157 0.0137 -0.92 0.7
--.CM2.Z. 1985-12-07T16:18:54.68 10.0 undecidable manual PN 123 0.0098 -0.27 1.5
--.BD1.Z. 1985-12-07T16:18:53.50 10.0 undecidable manual PG 286 0.0087 0.68 1.1
--.PS9.Z. 1985-12-07T16:18:52.50 10.0 positive manual PG 266 0.0088 -0.72 2
--.ASS.Z. 1985-12-07T16:18:51.50 10.0 undecidable manual PG 142 0.0083 -0.45 1.3
--.ARV.Z. 1985-12-07T16:18:50.00 10.0 undecidable manual PG 111 0.0074 -0.08 1.6
--.CRE.Z. 1985-12-07T16:18:38.00 10.0 positive manual PG 166 0.0016 0.16 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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