Earthquake with magnitude of Md 2.3 on date 01-10-1986 and time 16:03:57 (Italy) in region 3 km NW Scarperia e San Piero (FI)

A magnitude Md 2.3 earthquake occured in region: 3 km NW Scarperia e San Piero (FI), on

  • 01-10-1986 15:03:57 (UTC)
  • 01-10-1986 16:03:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.99, 11.3 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
Scarperia e San Piero FI 3 12217 12217
Barberino di Mugello FI 5 10836 23053
Borgo San Lorenzo FI 8 18211 41264
Vaglia FI 9 5073 46337
Vernio PO 14 6060 52397
Vaiano PO 14 9895 62292
Vicchio FI 15 8044 70336
Firenzuola FI 16 4726 75062
Cantagallo PO 16 3105 78167
Calenzano FI 17 17489 95656
Sesto Fiorentino FI 19 48958 144614
Fiesole FI 20 13969 158583

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Prato (191150 inhabitants)
24 Km N of Firenze (382808 inhabitants)
27 Km NE of Scandicci (50609 inhabitants)
31 Km E of Pistoia (90315 inhabitants)
53 Km SW of Imola (69797 inhabitants)
57 Km S of Bologna (386663 inhabitants)
57 Km SW of Faenza (58541 inhabitants)
65 Km W of Forlì (117913 inhabitants)
66 Km E of Lucca (89046 inhabitants)
74 Km N of Siena (53903 inhabitants)
74 Km NW of Arezzo (99543 inhabitants)
77 Km W of Cesena (96758 inhabitants)
78 Km E of Pisa (89158 inhabitants)
79 Km SE of Modena (184973 inhabitants)
85 Km E of Viareggio (62467 inhabitants)
86 Km SW of Ravenna (159116 inhabitants)
93 Km E of Massa (69479 inhabitants)
93 Km NE of Livorno (159219 inhabitants)
95 Km SE of Carpi (70699 inhabitants)
95 Km SE of Reggio nell'Emilia (171345 inhabitants)
97 Km E of Carrara (63133 inhabitants)
98 Km S of Ferrara (133155 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 2.3 1986-10-01
15:03:57
43.99 11.3 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 34949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-01 15:03:57 ± 0.741
Latitude 43.99 ± 0.07
Longitude 11.30 ± 0.05
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 34949

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) 8567.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 186
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00453
Epicentral distance of station farthest from the epicenter (degree) 0.01376
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 34949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:35:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CO9.Z. 1986-10-01T15:04:27.00 10.0 undecidable manual PN 300 0.0138 1.89 0.6
--.PS9.Z. 1986-10-01T15:04:21.00 10.0 undecidable manual SG 244 0.0055 1.05 0.4
--.CRE.Z. 1986-10-01T15:04:20.50 10.0 undecidable manual SG 127 0.0053 1.32 0.5
--.BDI.Z. 1986-10-01T15:04:15.00 10.0 undecidable manual SG 278 0.0045 -1.46 0.2
--.PS9.Z. 1986-10-01T15:04:10.20 10.0 undecidable manual PG 244 0.0055 -0.13 2.2
--.CRE.Z. 1986-10-01T15:04:09.00 10.0 undecidable manual PG 127 0.0053 -0.89 1.2
--.BDI.Z. 1986-10-01T15:04:08.00 10.0 undecidable manual PG 278 0.0045 -0.32 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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