Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 28-05-1992 and time 15:14:11 (Italy) in region 5 km SE Firenzuola (FI)

A magnitude Md 2.4 earthquake occured in region: 5 km SE Firenzuola (FI), on

  • 28-05-1992 13:14:11 (UTC)
  • 28-05-1992 15:14:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0810, 11.4050 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.

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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
Palazzuolo sul Senio FI 12 1154 5880
Borgo San Lorenzo FI 14 18211 24091
Scarperia e San Piero FI 15 12217 36308
Barberino di Mugello FI 16 10836 47144
Marradi FI 17 3139 50283
Castel del Rio BO 17 1246 51529
Monghidoro BO 17 3749 55278
Vicchio FI 17 8044 63322

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NE of Prato (191150 inhabitants)
37 Km NE of Firenze (382808 inhabitants)
39 Km SW of Imola (69797 inhabitants)
40 Km NE of Scandicci (50609 inhabitants)
42 Km E of Pistoia (90315 inhabitants)
45 Km SW of Faenza (58541 inhabitants)
46 Km S of Bologna (386663 inhabitants)
53 Km W of Forlì (117913 inhabitants)
67 Km W of Cesena (96758 inhabitants)
74 Km SE of Modena (184973 inhabitants)
74 Km SW of Ravenna (159116 inhabitants)
77 Km E of Lucca (89046 inhabitants)
78 Km NW of Arezzo (99543 inhabitants)
85 Km N of Siena (53903 inhabitants)
86 Km S of Ferrara (133155 inhabitants)
88 Km SE of Carpi (70699 inhabitants)
90 Km E of Pisa (89158 inhabitants)
92 Km SE of Reggio nell'Emilia (171345 inhabitants)
93 Km W of Rimini (147750 inhabitants)
95 Km E of Viareggio (62467 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 2.4
ML-VAX 1.8 		1992-05-28
13:14:11		 44.081 11.405 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 166189
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1992-05-28 13:14:11 ± 0.278
Latitude 44.0810 ± 0.0262
Longitude 11.4050 ± 0.0175
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 166189

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) 3236.5
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 16
Number of defining phases 16
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) 0.00275
Epicentral distance of station farthest from the epicenter (degree) 0.01222
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 166189
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:35:26

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 166189
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.PII.Z. 1992-05-28T13:14:38.46 10.0 undecidable manual SG 241 0.7326 0.37 0.7
--.ARV.Z. 1992-05-28T13:14:37.00 10.0 undecidable manual PN 117 1.2543 1.16 0.3
--.ASS.Z. 1992-05-28T13:14:37.50 10.0 undecidable manual PN 138 1.3542 0.18 1.3
--.GU9.Z. 1992-05-28T13:14:36.51 10.0 undecidable manual SG 295 0.6327 1.14 0.2
--.CRE.Z. 1992-05-28T13:14:34.00 10.0 undecidable manual SG 139 0.5994 -0.11 0.8
--.BDI.Z. 1992-05-28T13:14:33.17 10.0 undecidable manual SG 268 0.5772 -0.15 0.8
--.MME.Z. 1992-05-28T13:14:30.14 10.0 undecidable manual SG 283 0.5106 -1.18 0.2
--.PII.Z. 1992-05-28T13:14:27.39 10.0 undecidable manual PG 241 0.7326 0.41 1.6
--.SFI.Z. 1992-05-28T13:14:25.55 10.0 undecidable manual SG 119 0.3552 -0.37 0.7
--.GU9.Z. 1992-05-28T13:14:25.87 10.0 undecidable manual PG 295 0.6327 0.46 1.6
--.PGD.Z. 1992-05-28T13:14:24.40 10.0 undecidable manual SG 132 0.3108 0.67 0.5
--.BDI.Z. 1992-05-28T13:14:24.80 10.0 undecidable manual PG 268 0.5772 -0.15 2
--.CRE.Z. 1992-05-28T13:14:24.72 10.0 undecidable manual PG 139 0.5994 0.03 2.1
--.MME.Z. 1992-05-28T13:14:22.10 10.0 undecidable manual PG 283 0.5106 -0.97 0.7
--.SFI.Z. 1992-05-28T13:14:19.28 10.0 undecidable manual PG 119 0.3552 -0.67 1.2
--.PGD.Z. 1992-05-28T13:14:18.70 10.0 undecidable manual PG 132 0.3108 -0.62 1.3
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