Earthquake with magnitude of Md 2.1 on date 16-10-1985 and time 00:56:04 (UTC) in region 6 km SW Palazzuolo sul Senio (FI)

A magnitude Md 2.1 earthquake occured in region: 6 km SW Palazzuolo sul Senio (FI), on

  • 16-10-1985 00:56:04 (UTC)
  • 16-10-1985 01:56:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.068, 11.519 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
Palazzuolo sul Senio FI 6 1154 1154
Marradi FI 8 3139 4293
Firenzuola FI 13 4726 9019
Vicchio FI 15 8044 17063
Castel del Rio BO 16 1246 18309
Borgo San Lorenzo FI 16 18211 36520
San Godenzo FI 18 1167 37687
Tredozio FC 18 1212 38899
Casola Valsenio RA 19 2617 41516
Dicomano FI 20 5515 47031
Scarperia e San Piero FI 20 12217 59248

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Imola (69797 inhabitants)
38 Km SW of Faenza (58541 inhabitants)
39 Km NE of Firenze (382808 inhabitants)
40 Km NE of Prato (191150 inhabitants)
44 Km NE of Scandicci (50609 inhabitants)
45 Km W of Forlì (117913 inhabitants)
50 Km S of Bologna (386663 inhabitants)
50 Km E of Pistoia (90315 inhabitants)
58 Km W of Cesena (96758 inhabitants)
67 Km SW of Ravenna (159116 inhabitants)
73 Km NW of Arezzo (99543 inhabitants)
80 Km SE of Modena (184973 inhabitants)
84 Km W of Rimini (147750 inhabitants)
85 Km N of Siena (53903 inhabitants)
85 Km E of Lucca (89046 inhabitants)
86 Km S of Ferrara (133155 inhabitants)
94 Km SE of Carpi (70699 inhabitants)
98 Km E of Pisa (89158 inhabitants)
100 Km SE of Reggio nell'Emilia (171345 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 2.1 1985-10-16
00:56:04
44.068 11.519 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 14749
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-10-16 00:56:04 ± 0.48
Latitude 44.0680 ± 0.0791
Longitude 11.5190 ± 0.0548
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 14749

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) 9829.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 182
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
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) 0.00478
Epicentral distance of station farthest from the epicenter (degree) 0.01465
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 14749
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:17:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CO9.Z. 1985-10-16T00:56:33.00 10.0 undecidable manual PN 296 0.0147 -0.39 1.1
--.AS1.Z. 1985-10-16T00:56:30.00 10.0 undecidable manual PN 140 0.0117 1.23 0.3
--.AR1.Z. 1985-10-16T00:56:27.00 10.0 undecidable manual PN 118 0.0105 -0.08 1.5
--.BD1.Z. 1985-10-16T00:56:18.50 10.0 undecidable manual PG 270 0.0059 0.23 1.5
--.CH1.Z. 1985-10-16T00:56:15.00 10.0 undecidable manual PG 145 0.0048 -0.98 0.6
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download