Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 28-05-1992 and time 19:28:54 (Italy) in region 8 km S Firenzuola (FI)

A magnitude Md 2.4 earthquake occured in region: 8 km S Firenzuola (FI), on

  • 28-05-1992 17:28:54 (UTC)
  • 28-05-1992 19:28:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0500, 11.3760 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 8 4726 4726
Borgo San Lorenzo FI 11 18211 22937
Scarperia e San Piero FI 11 12217 35154
Barberino di Mugello FI 12 10836 45990
Vicchio FI 15 8044 54034
Palazzuolo sul Senio FI 16 1154 55188
Vernio PO 18 6060 61248
Vaglia FI 18 5073 66321
Marradi FI 19 3139 69460
Monghidoro BO 20 3749 73209

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NE of Prato (191150 inhabitants)
33 Km NE of Firenze (382808 inhabitants)
36 Km NE of Scandicci (50609 inhabitants)
39 Km E of Pistoia (90315 inhabitants)
43 Km SW of Imola (69797 inhabitants)
48 Km SW of Faenza (58541 inhabitants)
50 Km S of Bologna (386663 inhabitants)
57 Km W of Forlì (117913 inhabitants)
70 Km W of Cesena (96758 inhabitants)
74 Km E of Lucca (89046 inhabitants)
75 Km SE of Modena (184973 inhabitants)
77 Km NW of Arezzo (99543 inhabitants)
77 Km SW of Ravenna (159116 inhabitants)
81 Km N of Siena (53903 inhabitants)
86 Km E of Pisa (89158 inhabitants)
90 Km S of Ferrara (133155 inhabitants)
90 Km SE of Carpi (70699 inhabitants)
92 Km E of Viareggio (62467 inhabitants)
93 Km SE of Reggio nell'Emilia (171345 inhabitants)
95 Km W of Rimini (147750 inhabitants)
99 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
Bulletin
Rev1000 		Md 2.4
ML-VAX 1.9 		1992-05-28
17:28:54		 44.05 11.376 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 166339
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1992-05-28 17:28:54 ± 0.218
Latitude 44.0500 ± 0.0210
Longitude 11.3760 ± 0.0151
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 166339

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) 2632.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
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) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.02453
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 166339
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:35:34

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 5
Type of magnitude ML
Reference to an origin 166339
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
--.FVI.Z. 1992-05-28T17:29:39.00 10.0 undecidable manual PN 20 2.7195 -0.2 0.9
--.CTI.Z. 1992-05-28T17:29:30.10 10.0 undecidable manual PN 5 2.0091 0.8 0.7
--.ASS.Z. 1992-05-28T17:29:21.00 10.0 undecidable manual PN 136 1.3431 0.68 1.1
--.ARV.Z. 1992-05-28T17:29:19.97 10.0 undecidable manual PN 115 1.2543 0.93 0.8
--.PII.Z. 1992-05-28T17:29:19.22 10.0 undecidable manual SG 242 0.6882 -0.93 0.4
--.BDI.Z. 1992-05-28T17:29:16.11 10.0 undecidable manual SG 271 0.555 0.34 0.7
--.CRE.Z. 1992-05-28T17:29:16.37 10.0 undecidable manual SG 136 0.5883 -0.59 0.6
--.MME.Z. 1992-05-28T17:29:13.81 10.0 undecidable manual SG 286 0.4995 -0.23 0.8
--.PII.Z. 1992-05-28T17:29:10.27 10.0 positive manual PG 242 0.6882 0.78 2.4
--.SFI.Z. 1992-05-28T17:29:08.56 10.0 undecidable manual SG 113 0.3663 -0.69 0.5
--.CRE.Z. 1992-05-28T17:29:07.99 10.0 undecidable manual PG 136 0.5883 0.34 1.9
--.PGD.Z. 1992-05-28T17:29:06.75 10.0 undecidable manual SG 125 0.2997 0.01 0.8
--.BDI.Z. 1992-05-28T17:29:06.90 10.0 undecidable manual PG 271 0.555 -0.87 1.1
--.MME.Z. 1992-05-28T17:29:04.86 10.0 undecidable manual PG 286 0.4995 -1.1 0.7
--.SFI.Z. 1992-05-28T17:29:02.00 10.0 undecidable manual PG 113 0.3663 -1.2 0.6
--.PGD.Z. 1992-05-28T17:29:01.57 10.0 undecidable manual PG 125 0.2997 -0.18 2
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