Earthquake with magnitude of Md 2.5 on date 03-10-1986 and time 01:04:01 (Italy) in region 7 km SW Firenzuola (FI)

A magnitude Md 2.5 earthquake occured in region: 7 km SW Firenzuola (FI), on

  • 03-10-1986 00:04:01 (UTC)
  • 03-10-1986 01:04:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.07, 11.33 at 5 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
Firenzuola FI 7 4726 4726
Barberino di Mugello FI 10 10836 15562
Scarperia e San Piero FI 12 12217 27779
Borgo San Lorenzo FI 13 18211 45990
Vernio PO 14 6060 52050
Castiglione dei Pepoli BO 16 5648 57698
Monghidoro BO 17 3749 61447
Cantagallo PO 18 3105 64552
Vaglia FI 18 5073 69625
San Benedetto Val di Sambro BO 18 4315 73940
Palazzuolo sul Senio FI 19 1154 75094
Vicchio FI 19 8044 83138
Vaiano PO 19 9895 93033

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NE of Prato (191150 inhabitants)
34 Km N of Firenze (382808 inhabitants)
36 Km E of Pistoia (90315 inhabitants)
36 Km NE of Scandicci (50609 inhabitants)
45 Km SW of Imola (69797 inhabitants)
48 Km S of Bologna (386663 inhabitants)
51 Km W of Faenza (58541 inhabitants)
60 Km W of Forlì (117913 inhabitants)
70 Km E of Lucca (89046 inhabitants)
72 Km SE of Modena (184973 inhabitants)
74 Km W of Cesena (96758 inhabitants)
80 Km W of Ravenna (159116 inhabitants)
80 Km NW of Arezzo (99543 inhabitants)
83 Km N of Siena (53903 inhabitants)
84 Km E of Pisa (89158 inhabitants)
87 Km SE of Carpi (70699 inhabitants)
89 Km S of Ferrara (133155 inhabitants)
89 Km E of Viareggio (62467 inhabitants)
89 Km SE of Reggio nell'Emilia (171345 inhabitants)
95 Km E of Massa (69479 inhabitants)
98 Km E of Carrara (63133 inhabitants)
99 Km W of Rimini (147750 inhabitants)
100 Km NE of Livorno (159219 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 2.5 1986-10-03
00:04:01
44.07 11.33 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 35129
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-03 00:04:01 ± 0.384
Latitude 44.07 ± 0.05
Longitude 11.33 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 35129

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) 6183.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 205
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00469
Epicentral distance of station farthest from the epicenter (degree) 0.01247
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 35129
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:35:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-10-03T00:04:44.30 10.0 undecidable manual SN 114 0.0117 0.37 0.5
--.ASS.Z. 1986-10-03T00:04:28.00 10.0 undecidable manual PN 135 0.0125 0.87 0.4
--.ARV.Z. 1986-10-03T00:04:25.50 10.0 undecidable manual PN 114 0.0117 -0.38 1.3
--.CRE.Z. 1986-10-03T00:04:24.50 10.0 undecidable manual SG 134 0.0057 0.03 0.8
--.CRE.Z. 1986-10-03T00:04:14.00 10.0 undecidable manual PG 134 0.0057 -0.64 1
--.BDI.Z. 1986-10-03T00:04:12.50 10.0 undecidable manual PG 269 0.0047 -0.07 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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