Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 20-12-2014 and time 06:38:23 (Italy) in region 3 km W Greve in Chianti (FI)

A magnitude ML 2.1 earthquake occured in region: 3 km W Greve in Chianti (FI), on

  • 20-12-2014 05:38:23 (UTC)
  • 20-12-2014 06:38:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5700, 11.2820 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.

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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 3 13862 13862
Tavarnelle Val di Pesa FI 9 7800 21662
Barberino Val d'Elsa FI 9 4386 26048
Castellina in Chianti SI 11 2859 28907
Radda in Chianti SI 12 1613 30520
San Casciano in Val di Pesa FI 12 17062 47582
Impruneta FI 13 14615 62197
Poggibonsi SI 16 29196 91393
Gaiole in Chianti SI 17 2758 94151
Figline e Incisa Valdarno FI 17 23505 117656
Cavriglia AR 18 9614 127270
Montespertoli FI 19 13537 140807
Certaldo FI 20 16121 156928

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km S of Firenze (382808 inhabitants)
23 Km SE of Scandicci (50609 inhabitants)
28 Km N of Siena (53903 inhabitants)
38 Km SE of Prato (191150 inhabitants)
50 Km W of Arezzo (99543 inhabitants)
50 Km SE of Pistoia (90315 inhabitants)
70 Km E of Lucca (89046 inhabitants)
73 Km E of Pisa (89158 inhabitants)
78 Km E of Livorno (159219 inhabitants)
89 Km E of Viareggio (62467 inhabitants)
91 Km N of Grosseto (82087 inhabitants)
93 Km SW of Faenza (58541 inhabitants)
94 Km SW of Imola (69797 inhabitants)
95 Km SW of Forlì (117913 inhabitants)
100 Km SW of Cesena (96758 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 		ML 2.1 2014-12-20
05:38:23		 43.5703 11.2818 10 2015-09-21
09:40:11		 Bollettino Sismico Italiano INGV 18481421
Reviewed
Rev100 		ML 2.0 2014-12-20
05:38:22		 43.5703 11.3328 1 2014-12-20
05:46:15		 Sala Sismica INGV-Roma 15259371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2014-12-20 05:38:23 ± 0.12
Latitude 43.5703 ± 0.0054
Longitude 11.2818 ± 0.0074
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 18481421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 458
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 279
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.00814
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 18481421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-17 07:38:20

ML:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 15259371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2014-12-20 05:46:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2014-12-20T05:39:33.99 3.0 undecidable manual Sn 1.8 0
IV.FAGN.HHZ. 2014-12-20T05:39:02.30 3.0 negative manual Pg 2.67 0
GU.EQUI.HHZ. 2014-12-20T05:38:55.68 0.6 undecidable manual S 307 111.8991 50 0.11 61
IV.BDI.HHE. 2014-12-20T05:38:46.64 0.6 undecidable manual S 315 77.367 50 0.29 63
IV.FNVD.HHE. 2014-12-20T05:38:43.66 0.6 undecidable manual S 349 67.4769 50 -0.06 67
IV.LMD.HHE. 2014-12-20T05:38:43.50 0.3 undecidable manual S 31 65.7897 50 0.24 98
GU.POPM.HHZ. 2014-12-20T05:38:43.45 0.6 undecidable manual S 322 67.377 50 -0.24 65
GU.EQUI.HHZ. 2014-12-20T05:38:42.62 0.6 negative manual P 307 111.8991 50 0.8 50
IV.TRIF.HHE. 2014-12-20T05:38:41.49 0.6 undecidable manual S 211 59.0964 50 0.02 69
IV.PII.HHE. 2014-12-20T05:38:41.68 0.6 undecidable manual S 286 62.9925 50 -0.85 54
IV.SFI.EHE. 2014-12-20T05:38:41.43 0.6 undecidable manual S 50 58.5969 50 0.09 68
IV.ASQU.HHZ. 2014-12-20T05:38:38.18 0.3 undecidable manual S 58 47.8188 50 -0.29 100
IV.BDI.HHE. 2014-12-20T05:38:37.13 0.6 undecidable manual P 315 77.367 50 0.63 57
GU.MAIM.HHE. 2014-12-20T05:38:36.32 0.6 undecidable manual P 301 73.9704 50 0.35 63
GU.CARD.HHE. 2014-12-20T05:38:36.93 1.0 undecidable manual P 309 81.5517 50 -0.22 32
IV.FROS.HHZ. 2014-12-20T05:38:36.73 0.6 undecidable manual S 194 41.2254 50 0.01 71
IV.FNVD.HHE. 2014-12-20T05:38:35.00 0.6 undecidable manual P 349 67.4769 50 0.02 68
GU.POPM.HHZ. 2014-12-20T05:38:35.34 0.6 undecidable manual P 322 67.377 50 0.38 63
IV.LMD.HHE. 2014-12-20T05:38:35.05 0.6 undecidable manual P 31 65.7897 50 0.34 64
IV.RUFI.EHZ. 2014-12-20T05:38:34.50 0.3 undecidable manual S 32 34.8429 50 -0.51 97
IV.CAFI.HHE. 2014-12-20T05:38:34.69 0.6 undecidable manual P 116 61.2942 50 0.67 58
IV.SFI.EHE. 2014-12-20T05:38:33.76 0.6 undecidable manual P 50 58.5969 50 0.16 67
IV.TRIF.HHE. 2014-12-20T05:38:33.60 0.6 undecidable manual P 211 59.0964 50 -0.08 68
IV.PII.HHE. 2014-12-20T05:38:33.92 0.6 undecidable manual P 286 62.9925 50 -0.37 64
IV.ASQU.HHZ. 2014-12-20T05:38:32.12 0.6 undecidable manual P 58 47.8188 50 0.17 68
IV.MTCR.EHE. 2014-12-20T05:38:32.80 0.6 undecidable manual P 336 55.5 50 -0.33 65
IV.FROS.HHZ. 2014-12-20T05:38:30.78 1.0 negative manual P 194 41.2254 50 -0.16 35
IV.RUFI.EHZ. 2014-12-20T05:38:29.53 0.6 undecidable manual P 32 34.8429 50 -0.42 66
IV.CSNT.HHZ. 2014-12-20T05:38:28.08 0.6 undecidable manual S 176 10.7781 133 -0.1 74
IV.CSNT.HHZ. 2014-12-20T05:38:25.73 0.6 undecidable manual P 176 10.7781 133 -0.28 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHN. ML:2.0 0.00028599999999999996 0.8 AML other m 2014-12-20T05:38:38.82
IV.ASQU.HHE. ML:2.2 0.000421 0.26 AML other m 2014-12-20T05:38:38.79
IV.CSNT.HHE. ML:2.1 0.001415 0.22 AML other m 2014-12-20T05:38:28.43
IV.CSNT.HHN. ML:2.0 0.0012549999999999998 0.52 AML other m 2014-12-20T05:38:28.74
IV.FROS.HHE. ML:2.1 0.0004335 0.8 AML other m 2014-12-20T05:38:37.00
IV.FROS.HHN. ML:2.0 0.0003535 0.36 AML other m 2014-12-20T05:38:37.75
GU.POPM.HHN. ML:2.1 0.000225 0.16 AML other m 2014-12-20T05:38:44.09
GU.POPM.HHE. ML:1.9 0.00014749999999999998 0.28 AML other m 2014-12-20T05:38:44.27
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
Waveforms Seismic signals in miniseed + resp format Download