Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 09-12-1994 and time 06:11:37 (UTC) in region 7 km NE Greve in Chianti (FI)

A magnitude Md 2.3 earthquake occured in region: 7 km NE Greve in Chianti (FI), on

  • 09-12-1994 06:11:37 (UTC)
  • 09-12-1994 07:11:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.6380, 11.3640 at 7 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
Greve in Chianti FI 7 13862 13862
Figline e Incisa Valdarno FI 8 23505 37367
Impruneta FI 10 14615 51982
Rignano sull'Arno FI 12 8651 60633
Bagno a Ripoli FI 13 25611 86244
San Casciano in Val di Pesa FI 15 17062 103306
Reggello FI 15 16290 119596
San Giovanni Valdarno AR 16 17018 136614
Castelfranco Piandiscò AR 16 9632 146246
Cavriglia AR 16 9614 155860
Pontassieve FI 17 20603 176463
Radda in Chianti SI 17 1613 178076
Firenze FI 17 382808 560884
Tavarnelle Val di Pesa FI 18 7800 568684
Barberino Val d'Elsa FI 19 4386 573070
Pelago FI 19 7660 580730
Gaiole in Chianti SI 20 2758 583488
Castellina in Chianti SI 20 2859 586347
Fiesole FI 20 13969 600316
Scandicci FI 20 50609 650925

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km SE of Firenze (382808 inhabitants)
20 Km SE of Scandicci (50609 inhabitants)
35 Km SE of Prato (191150 inhabitants)
36 Km N of Siena (53903 inhabitants)
46 Km W of Arezzo (99543 inhabitants)
49 Km SE of Pistoia (90315 inhabitants)
73 Km E of Lucca (89046 inhabitants)
78 Km E of Pisa (89158 inhabitants)
83 Km SW of Faenza (58541 inhabitants)
84 Km SW of Imola (69797 inhabitants)
85 Km SW of Forlì (117913 inhabitants)
85 Km E of Livorno (159219 inhabitants)
90 Km SW of Cesena (96758 inhabitants)
93 Km E of Viareggio (62467 inhabitants)
95 Km S of Bologna (386663 inhabitants)
100 Km N of Grosseto (82087 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 2.3
ML-VAX 1.6 		1994-12-09
06:11:37		 43.638 11.364 7 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 221009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1994-12-09 06:11:37 ± 0.343
Latitude 43.6380 ± 0.0209
Longitude 11.3640 ± 0.0110
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 221009

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) 2483.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 185
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.00623
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 221009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:28:44

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 221009
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
--.BDI.Z. 1994-12-09T06:12:02.75 10.0 undecidable manual SG 307 0.6882 0.62 0.3
--.PII.Z. 1994-12-09T06:12:00.00 10.0 undecidable manual SG 278 0.6105 0.57 0.3
--.SFI.Z. 1994-12-09T06:11:54.50 10.0 undecidable manual SG 52 0.4329 0.63 0.3
--.CRE.Z. 1994-12-09T06:11:53.27 10.0 undecidable manual SG 92 0.4218 -0.15 0.8
--.BDI.Z. 1994-12-09T06:11:51.74 10.0 undecidable manual PG 307 0.6882 0.11 1.5
--.PTF.Z. 1994-12-09T06:11:51.45 10.0 undecidable manual SG 326 0.3774 -0.68 0.3
--.PGD.Z. 1994-12-09T06:11:51.88 10.0 undecidable manual SG 47 0.3552 0.88 0.1
--.PII.Z. 1994-12-09T06:11:50.29 10.0 undecidable manual PG 278 0.6105 0.22 1.5
--.CRE.Z. 1994-12-09T06:11:46.45 10.0 undecidable manual PG 92 0.4218 -0.14 1.9
--.SFI.Z. 1994-12-09T06:11:46.66 10.0 undecidable manual PG 52 0.4329 -0.2 1.9
--.PGD.Z. 1994-12-09T06:11:45.20 10.0 undecidable manual PG 47 0.3552 0 2.1
--.PTF.Z. 1994-12-09T06:11:44.82 10.0 undecidable manual PG 326 0.3774 -1.03 0.2
--.FIR.Z. 1994-12-09T06:11:44.00 10.0 undecidable manual SG 329 0.1554 0.21 0.7
--.FIR.Z. 1994-12-09T06:11:41.00 10.0 undecidable manual PG 329 0.1554 -0.03 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