Earthquake with magnitude of Md 2.3 on date 28-11-1985 and time 13:01:45 (Italy) in region 4 km W Vaglia (FI)

A magnitude Md 2.3 earthquake occured in region: 4 km W Vaglia (FI), on

  • 28-11-1985 12:01:45 (UTC)
  • 28-11-1985 13:01:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9, 11.24 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
Vaglia FI 4 5073 5073
Calenzano FI 7 17489 22562
Sesto Fiorentino FI 8 48958 71520
Scarperia e San Piero FI 10 12217 83737
Barberino di Mugello FI 11 10836 94573
Fiesole FI 11 13969 108542
Prato PO 12 191150 299692
Vaiano PO 12 9895 309587
Campi Bisenzio FI 12 46166 355753
Borgo San Lorenzo FI 13 18211 373964
Firenze FI 15 382808 756772
Montemurlo PO 16 18456 775228
Scandicci FI 17 50609 825837
Signa FI 17 19179 845016
Poggio a Caiano PO 17 10007 855023
Cantagallo PO 18 3105 858128
Montale PT 18 10737 868865
Bagno a Ripoli FI 18 25611 894476
Lastra a Signa FI 18 20156 914632
Vernio PO 18 6060 920692
Agliana PT 19 17525 938217
Vicchio FI 19 8044 946261

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km E of Prato (191150 inhabitants)
15 Km N of Firenze (382808 inhabitants)
17 Km N of Scandicci (50609 inhabitants)
26 Km E of Pistoia (90315 inhabitants)
59 Km E of Lucca (89046 inhabitants)
63 Km SW of Imola (69797 inhabitants)
65 Km N of Siena (53903 inhabitants)
67 Km S of Bologna (386663 inhabitants)
67 Km SW of Faenza (58541 inhabitants)
70 Km E of Pisa (89158 inhabitants)
71 Km NW of Arezzo (99543 inhabitants)
73 Km W of Forlì (117913 inhabitants)
79 Km E of Viareggio (62467 inhabitants)
84 Km E of Livorno (159219 inhabitants)
85 Km W of Cesena (96758 inhabitants)
87 Km SE of Modena (184973 inhabitants)
89 Km E of Massa (69479 inhabitants)
93 Km E of Carrara (63133 inhabitants)
96 Km SW of Ravenna (159116 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 1985-11-28
12:01:45
43.9 11.24 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 16989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-11-28 12:01:45 ± 0.289
Latitude 43.90 ± 0.05
Longitude 11.24 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 16989

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) 5632.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 162
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00437
Epicentral distance of station farthest from the epicenter (degree) 0.01384
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 16989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:19:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CO9.Z. 1985-11-28T12:02:13.50 10.0 undecidable manual PN 304 0.0138 0.84 0.5
--.ARV.Z. 1985-11-28T12:02:09.50 10.0 undecidable manual PN 107 0.0117 0.25 1.2
--.BDI.Z. 1985-11-28T12:02:03.00 10.0 undecidable manual SG 288 0.0044 -0.01 1
--.PS9.Z. 1985-11-28T12:01:57.00 10.0 undecidable manual PG 250 0.0049 0.36 1.4
--.CRE.Z. 1985-11-28T12:01:57.00 10.0 undecidable manual PG 118 0.0053 -0.38 1.4
--.BDI.Z. 1985-11-28T12:01:54.50 10.0 undecidable manual PG 288 0.0044 -1.07 0.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download