Earthquake with magnitude of Md 2.8 on date 12-03-1985 and time 09:50:42 (Italy) in region 8 km W Premilcuore (FC)

A magnitude Md 2.8 earthquake occured in region: 8 km W Premilcuore (FC), on

  • 12-03-1985 08:50:42 (UTC)
  • 12-03-1985 09:50:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.99, 11.68 at 6 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
San Godenzo FI 8 1167 1966
Portico e San Benedetto FC 9 756 2722
Marradi FI 11 3139 5861
Tredozio FC 11 1212 7073
Rocca San Casciano FC 16 1910 8983
Dicomano FI 16 5515 14498
Londa FI 17 1840 16338
Palazzuolo sul Senio FI 17 1154 17492
Vicchio FI 18 8044 25536
Galeata FC 19 2516 28052
Santa Sofia FC 19 4136 32188

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SW of Faenza (58541 inhabitants)
39 Km SW of Forlì (117913 inhabitants)
41 Km S of Imola (69797 inhabitants)
42 Km NE of Firenze (382808 inhabitants)
47 Km NE of Scandicci (50609 inhabitants)
48 Km E of Prato (191150 inhabitants)
48 Km W of Cesena (96758 inhabitants)
61 Km N of Arezzo (99543 inhabitants)
61 Km E of Pistoia (90315 inhabitants)
62 Km SE of Bologna (386663 inhabitants)
63 Km SW of Ravenna (159116 inhabitants)
72 Km W of Rimini (147750 inhabitants)
80 Km NE of Siena (53903 inhabitants)
94 Km SE of Modena (184973 inhabitants)
94 Km S of Ferrara (133155 inhabitants)
95 Km E of Lucca (89046 inhabitants)
100 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 2.8 1985-03-12
08:50:42
43.99 11.68 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 3179
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-12 08:50:42 ± 0.584
Latitude 43.99 ± 0.02
Longitude 11.68 ± 0.03
Depth (km) 6 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3179

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) 3135.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.02776
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitude information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 3179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RBL.Z. 1985-03-12T08:52:02.00 10.0 undecidable manual SN 27 0.025 1.29 0.2
--.CTI.Z. 1985-03-12T08:51:42.00 10.0 undecidable manual SN 359 0.0185 -1.31 0.3
--.PO9.Z. 1985-03-12T08:51:34.00 10.0 undecidable manual SN 146 0.0151 -0.61 0.6
--.ORO.Z. 1985-03-12T08:51:32.00 10.0 undecidable manual PN? 302 0.0278 0.03 0.5
--.RBL.Z. 1985-03-12T08:51:29.00 10.0 undecidable manual PN 27 0.025 1.16 0.7
--.FO1.Z. 1985-03-12T08:51:27.50 10.0 undecidable manual PN 15 0.0244 0.65 1.2
--.CK1.Z. 1985-03-12T08:51:25.00 10.0 undecidable manual PN? 280 0.0222 1.49 0.2
--.VOY.Z. 1985-03-12T08:51:23.30 10.0 undecidable manual PN 36 0.0231 -1.58 0.4
--.TRI.Z. 1985-03-12T08:51:21.50 10.0 undecidable manual PN? 39 0.0203 0.81 0.5
--.AQU.Z. 1985-03-12T08:51:17.00 10.0 undecidable manual PN 141 0.0185 -0.92 1.1
--.CTI.Z. 1985-03-12T08:51:16.50 10.0 undecidable manual PN 359 0.0185 -1.3 0.7
--.PO9.Z. 1985-03-12T08:51:14.00 10.0 undecidable manual PN 146 0.0151 1.22 0.9
--.MNS.Z. 1985-03-12T08:51:14.50 10.0 undecidable manual PN 154 0.0159 0.69 1.4
--.SAL.Z. 1985-03-12T08:51:12.50 10.0 undecidable manual PN? 333 0.0163 -1.92 0.1
--.BD1.Z. 1985-03-12T08:51:10.50 10.0 undecidable manual SG 275 0.007 -0.07 1.1
--.AR1.Z. 1985-03-12T08:51:05.00 10.0 undecidable manual PG 117 0.0093 1.29 0.8
--.AS1.Z. 1985-03-12T08:51:05.50 10.0 undecidable manual PN 142 0.0104 -0.11 1.9
--.PS9.Z. 1985-03-12T08:51:00.00 10.0 undecidable manual PG 252 0.0079 -0.65 1.5
--.BD1.Z. 1985-03-12T08:51:00.50 10.0 undecidable manual PG 275 0.007 1.6 0.5
--.FIR.N. 1985-03-12T08:50:58.00 10.0 undecidable manual SG 234 0.0033 0.51 0.7
--.CH1.Z. 1985-03-12T08:50:58.50 10.0 undecidable manual SG 151 0.0036 -0.34 1.1
--.CH1.Z. 1985-03-12T08:50:51.50 10.0 positive manual PG 151 0.0036 -0.62 3.1
--.FIR.Z. 1985-03-12T08:50:51.00 10.0 negative manual PG 234 0.0033 -0.34 3.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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