Earthquake with magnitude of Md 2.6 on date 11-12-1985 and time 03:04:44 (Italy) in region 8 km W Premilcuore (FC)

A magnitude Md 2.6 earthquake occured in region: 8 km W Premilcuore (FC), on

  • 11-12-1985 02:04:44 (UTC)
  • 11-12-1985 03:04:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.01, 11.69 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
Premilcuore FC 8 799 799
Portico e San Benedetto FC 8 756 1555
Tredozio FC 9 1212 2767
Marradi FI 10 3139 5906
San Godenzo FI 10 1167 7073
Rocca San Casciano FC 14 1910 8983
Palazzuolo sul Senio FI 17 1154 10137
Galeata FC 18 2516 12653
Dicomano FI 18 5515 18168
Santa Sofia FC 19 4136 22304
Modigliana FC 19 4560 26864
Londa FI 19 1840 28704
Vicchio FI 20 8044 36748
Civitella di Romagna FC 20 3786 40534

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Faenza (58541 inhabitants)
37 Km SW of Forlì (117913 inhabitants)
39 Km S of Imola (69797 inhabitants)
44 Km NE of Firenze (382808 inhabitants)
47 Km W of Cesena (96758 inhabitants)
49 Km NE of Scandicci (50609 inhabitants)
50 Km E of Prato (191150 inhabitants)
61 Km SE of Bologna (386663 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
62 Km N of Arezzo (99543 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
70 Km W of Rimini (147750 inhabitants)
82 Km NE of Siena (53903 inhabitants)
93 Km S of Ferrara (133155 inhabitants)
94 Km SE of Modena (184973 inhabitants)
97 Km E of Lucca (89046 inhabitants)
99 Km W of Pesaro (94582 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 2.6 1985-12-11
02:04:44
44.01 11.69 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 17859
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-11 02:04:44 ± 0.964
Latitude 44.01 ± 0.03
Longitude 11.69 ± 0.03
Depth (km) 10 ± 6 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 17859

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) 4286.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 204
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00348
Epicentral distance of station farthest from the epicenter (degree) 0.00931
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 17859
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:20:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1985-12-11T02:05:20.00 10.0 undecidable manual SN 118 0.0093 0.66 0.4
--.BD1.Z. 1985-12-11T02:05:11.00 10.0 undecidable manual SG 274 0.007 -0.41 0.6
--.ARV.Z. 1985-12-11T02:05:05.00 10.0 undecidable manual PN 118 0.0093 0.51 1.2
--.PS9.Z. 1985-12-11T02:05:02.00 10.0 undecidable manual PG 251 0.0079 0.24 1.7
--.BD1.Z. 1985-12-11T02:05:00.00 10.0 undecidable manual PG 274 0.007 0.09 2
--.FIR.N. 1985-12-11T02:05:00.00 10.0 undecidable manual SG 233 0.0035 1.35 0.1
--.CRE.Z. 1985-12-11T02:05:00.00 10.0 undecidable manual SG 153 0.0038 0.1 0.8
--.CRE.Z. 1985-12-11T02:04:52.50 10.0 undecidable manual PG 153 0.0038 -0.77 0.9
--.FIR.Z. 1985-12-11T02:04:52.00 10.0 undecidable manual PG 233 0.0035 -0.54 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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