Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 20-12-2014 and time 07:38:28 (Italy) in region 6 km W Greve in Chianti (FI)

A magnitude ML 2.1 earthquake occured in region: 6 km W Greve in Chianti (FI), on

  • 20-12-2014 06:38:28 (UTC)
  • 20-12-2014 07:38:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5850, 11.2430 at 9 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 6 13862 13862
Tavarnelle Val di Pesa FI 6 7800 21662
Barberino Val d'Elsa FI 7 4386 26048
San Casciano in Val di Pesa FI 9 17062 43110
Impruneta FI 11 14615 57725
Castellina in Chianti SI 13 2859 60584
Montespertoli FI 15 13537 74121
Poggibonsi SI 15 29196 103317
Radda in Chianti SI 15 1613 104930
Certaldo FI 17 16121 121051
Figline e Incisa Valdarno FI 19 23505 144556
Bagno a Ripoli FI 20 25611 170167
Scandicci FI 20 50609 220776

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km S of Scandicci (50609 inhabitants)
21 Km S of Firenze (382808 inhabitants)
31 Km N of Siena (53903 inhabitants)
35 Km SE of Prato (191150 inhabitants)
47 Km SE of Pistoia (90315 inhabitants)
53 Km W of Arezzo (99543 inhabitants)
66 Km E of Lucca (89046 inhabitants)
69 Km E of Pisa (89158 inhabitants)
75 Km E of Livorno (159219 inhabitants)
86 Km E of Viareggio (62467 inhabitants)
92 Km N of Grosseto (82087 inhabitants)
93 Km SW of Faenza (58541 inhabitants)
94 Km SW of Imola (69797 inhabitants)
96 Km SW of Forlì (117913 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
06:38:28		 43.5853 11.2427 9 2015-09-21
09:40:11		 Bollettino Sismico Italiano INGV 18621411
Reviewed
Rev100 		ML 2.1 2014-12-20
06:38:28		 43.5837 11.2582 10 2014-12-20
06:44:46		 Sala Sismica INGV-Roma 15293571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2014-12-20 06:38:28 ± 0.11
Latitude 43.5853 ± 0.0054
Longitude 11.2427 ± 0.0062
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 18621411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 510
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
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) 77
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
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) 0.06205
Epicentral distance of station farthest from the epicenter (degree) 0.97576
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 18621411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-23 07:26:11

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 15293571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2014-12-20 06:44:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BADI.EHE. 2014-12-20T06:38:54.00 0.6 undecidable manual S 96 80.9523 50 0.76 48
IV.PARC.HHZ. 2014-12-20T06:38:53.74 0.6 undecidable manual S 85 80.2641 50 0.68 49
IV.LMD.HHZ. 2014-12-20T06:38:49.34 0.6 undecidable manual S 34 66.0894 50 0.08 59
GU.POPM.HHZ. 2014-12-20T06:38:49.65 0.6 undecidable manual S 323 64.0914 50 0.91 46
GU.MAIM.HHZ. 2014-12-20T06:38:49.73 0.3 undecidable manual S 301 70.374 50 -0.69 75
IV.CAFI.HHZ. 2014-12-20T06:38:48.46 0.6 undecidable manual S 116 64.7907 50 -0.47 55
IV.TRIF.HHZ. 2014-12-20T06:38:47.45 0.6 undecidable manual S 208 58.9965 50 0.08 60
IV.SFI.EHZ. 2014-12-20T06:38:47.30 0.6 undecidable manual S 54 59.9955 50 -0.34 57
GU.EQUI.HHE. 2014-12-20T06:38:47.62 1.0 undecidable manual P 307 108.3138 50 0.53 25
IV.CRE.HHZ. 2014-12-20T06:38:46.81 0.6 undecidable manual S 86 57.0984 50 -0.05 61
IV.PII.HHZ. 2014-12-20T06:38:46.80 0.6 undecidable manual S 285 59.5959 50 -0.73 50
IV.MGAB.HHE. 2014-12-20T06:38:46.68 1.0 undecidable manual P 136 102.5196 50 0.49 25
IV.MTCR.EHZ. 2014-12-20T06:38:45.83 0.6 undecidable manual S 339 52.7028 50 0.13 60
IV.CASP.HHE. 2014-12-20T06:38:45.41 0.6 undecidable manual P 199 93.3399 50 0.64 49
IV.ATTE.HHE. 2014-12-20T06:38:45.65 1.0 undecidable manual P 115 99.3228 50 -0.05 28
IV.ATPI.EHE. 2014-12-20T06:38:45.48 1.0 undecidable manual P 99 94.4388 50 0.53 25
IV.ATVO.HHE. 2014-12-20T06:38:44.99 1.0 undecidable manual P 103 96.3258 50 -0.25 27
IV.ASQU.HHZ. 2014-12-20T06:38:44.46 0.6 undecidable manual S 62 49.7169 50 -0.44 57
IV.PARC.HHZ. 2014-12-20T06:38:43.45 0.6 undecidable manual P 85 80.2641 50 0.69 49
IV.BADI.EHE. 2014-12-20T06:38:43.24 1.0 undecidable manual P 96 80.9523 50 0.37 27
GU.CARD.HHE. 2014-12-20T06:38:42.94 1.0 undecidable manual P 309 78.0663 50 0.51 26
IV.BDI.HHE. 2014-12-20T06:38:42.40 0.6 undecidable manual P 316 73.9704 50 0.61 51
IV.FROS.HHZ. 2014-12-20T06:38:42.63 0.6 undecidable manual S 190 42.2244 50 -0.28 60
GU.MAIM.HHZ. 2014-12-20T06:38:41.39 0.6 negative manual P 301 70.374 50 0.15 58
GU.POPM.HHZ. 2014-12-20T06:38:41.06 0.6 undecidable manual P 323 64.0914 50 0.79 49
IV.RUFI.EHZ. 2014-12-20T06:38:40.14 0.6 undecidable manual S 37 35.2425 50 -0.9 49
IV.SFI.EHZ. 2014-12-20T06:38:40.21 0.6 undecidable manual P 54 59.9955 50 0.57 53
IV.CAFI.HHZ. 2014-12-20T06:38:40.25 0.6 undecidable manual P 116 64.7907 50 -0.13 59
IV.LMD.HHZ. 2014-12-20T06:38:40.52 0.6 positive manual P 34 66.0894 50 -0.05 60
IV.TRIF.HHZ. 2014-12-20T06:38:39.39 0.6 undecidable manual P 208 58.9965 50 -0.09 60
IV.CRE.HHZ. 2014-12-20T06:38:39.39 0.6 undecidable manual P 86 57.0984 50 0.2 59
IV.PII.HHZ. 2014-12-20T06:38:39.65 0.6 negative manual P 285 59.5959 50 0.08 60
IV.MTCR.EHZ. 2014-12-20T06:38:38.11 1.0 positive manual P 339 52.7028 50 -0.41 28
IV.ASQU.HHZ. 2014-12-20T06:38:37.71 0.6 undecidable manual P 62 49.7169 50 -0.34 58
IV.FROS.HHZ. 2014-12-20T06:38:36.76 0.3 positive manual P 190 42.2244 50 -0.14 92
IV.RUFI.EHZ. 2014-12-20T06:38:35.03 0.3 positive manual P 37 35.2425 50 -0.79 77
IV.CSNT.HHZ. 2014-12-20T06:38:34.04 0.6 undecidable manual S 163 13.0758 124 -0.15 65
IV.OSSC.HHZ. 2014-12-20T06:38:32.60 0.6 undecidable manual S 178 6.8931 143 -0.01 67
IV.CSNT.HHZ. 2014-12-20T06:38:31.59 0.6 undecidable manual P 163 13.0758 124 -0.28 63
IV.OSSC.HHZ. 2014-12-20T06:38:30.92 0.3 undecidable manual P 178 6.8931 143 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHN. ML:2.4 0.000617 0.26 AML other m 2014-12-20T06:38:45.50
IV.ASQU.HHE. ML:2.5 0.00088 0.6 AML other m 2014-12-20T06:38:45.47
IV.CAFI.HHN. ML:1.6 0.00007115 0.8 AML other m 2014-12-20T06:38:49.83
IV.CAFI.HHE. ML:1.5 0.00005965 1.58 AML other m 2014-12-20T06:38:51.90
IV.CRE.HHE. ML:1.8 0.000142 0.3 AML other m 2014-12-20T06:38:47.83
IV.CRE.HHN. ML:2.1 0.0002595 0.2 AML other m 2014-12-20T06:38:49.34
IV.CSNT.HHN. ML:2.2 0.001615 0.2 AML other m 2014-12-20T06:38:35.45
IV.CSNT.HHE. ML:2.0 0.00127 0.5 AML other m 2014-12-20T06:38:35.60
IV.LMD.HHN. ML:2.2 0.00032700000000000003 0.92 AML other m 2014-12-20T06:38:52.08
IV.LMD.HHE. ML:2.2 0.0002725 0.22 AML other m 2014-12-20T06:38:50.43
GU.MAIM.HHN. ML:1.5 0.000053 0.58 AML other m 2014-12-20T06:38:53.05
GU.MAIM.HHE. ML:1.6 0.0000615 0.8 AML other m 2014-12-20T06:38:53.48
IV.OSSC.HHE. ML:2.4 0.00443 0.16 AML other m 2014-12-20T06:38:33.82
IV.OSSC.HNN. ML:2.4 0.004305 0.16 AML other m 2014-12-20T06:38:33.74
IV.OSSC.HNE. ML:2.4 0.00398 0.2 AML other m 2014-12-20T06:38:33.78
IV.OSSC.HHN. ML:2.4 0.00404 0.2 AML other m 2014-12-20T06:38:33.78
IV.PARC.HHN. ML:1.8 0.00007905 0.48 AML other m 2014-12-20T06:38:54.55
IV.PARC.HHE. ML:1.6 0.000058 0.8 AML other m 2014-12-20T06:38:54.54
IV.PII.HHE. ML:2.0 0.00022799999999999999 0.28 AML other m 2014-12-20T06:38:50.55
IV.PII.HHN. ML:2.0 0.0002175 0.28 AML other m 2014-12-20T06:38:51.17
IV.RUFI.EHN. ML:1.9 0.00035 0.18 AML other m 2014-12-20T06:38:40.26
IV.RUFI.EHE. ML:2.4 0.0011392 0.18 AML other m 2014-12-20T06:38:41.15
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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