Earthquake with magnitude of Md 2.2 on date 01-10-1986 and time 10:13:14 (Italy) in region 5 km N Firenzuola (FI)

A magnitude Md 2.2 earthquake occured in region: 5 km N Firenzuola (FI), on

  • 01-10-1986 09:13:14 (UTC)
  • 01-10-1986 10:13:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.17, 11.38 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
Firenzuola FI 5 4726 4726
Monghidoro BO 8 3749 8475
Castel del Rio BO 12 1246 9721
Loiano BO 12 4294 14015
San Benedetto Val di Sambro BO 13 4315 18330
Monzuno BO 15 6328 24658
Palazzuolo sul Senio FI 15 1154 25812
Fontanelice BO 18 1943 27755
Castiglione dei Pepoli BO 18 5648 33403
Monterenzio BO 18 6035 39438

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Imola (69797 inhabitants)
37 Km S of Bologna (386663 inhabitants)
39 Km NE of Prato (191150 inhabitants)
43 Km W of Faenza (58541 inhabitants)
45 Km NE of Pistoia (90315 inhabitants)
45 Km N of Firenze (382808 inhabitants)
48 Km NE of Scandicci (50609 inhabitants)
53 Km W of Forlì (117913 inhabitants)
64 Km SE of Modena (184973 inhabitants)
69 Km W of Cesena (96758 inhabitants)
71 Km W of Ravenna (159116 inhabitants)
77 Km S of Ferrara (133155 inhabitants)
79 Km E of Lucca (89046 inhabitants)
79 Km SE of Carpi (70699 inhabitants)
84 Km SE of Reggio nell'Emilia (171345 inhabitants)
88 Km NW of Arezzo (99543 inhabitants)
93 Km NE of Pisa (89158 inhabitants)
94 Km N of Siena (53903 inhabitants)
96 Km W of Rimini (147750 inhabitants)
96 Km E of Viareggio (62467 inhabitants)
100 Km E of Massa (69479 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 2.2 1986-10-01
09:13:14
44.17 11.38 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 34929
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-01 09:13:14 ± 1.276
Latitude 44.17 ± 0.09
Longitude 11.38 ± 0.05
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 34929

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) 11168.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 242
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) 0.0051
Epicentral distance of station farthest from the epicenter (degree) 0.0068
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 34929
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:35:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CRE.Z. 1986-10-01T09:13:39.00 10.0 undecidable manual SG 142 0.0062 0.8 0.3
--.BDI.Z. 1986-10-01T09:13:33.50 10.0 undecidable manual SG 259 0.0051 -0.95 0.2
--.PS9.Z. 1986-10-01T09:13:29.50 10.0 undecidable manual PG 233 0.0068 0.07 1.9
--.CRE.Z. 1986-10-01T09:13:27.50 10.0 undecidable manual PG 142 0.0062 -0.59 1.2
--.BDI.Z. 1986-10-01T09:13:26.50 10.0 undecidable manual PG 259 0.0051 0.58 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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