Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 20-12-2014 and time 09:26:18 (Italy) in region 7 km W Greve in Chianti (FI)

A magnitude ML 1.3 earthquake occured in region: 7 km W Greve in Chianti (FI), on

  • 20-12-2014 08:26:18 (UTC)
  • 20-12-2014 09:26:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.6030, 11.2410 at 11 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
Tavarnelle Val di Pesa FI 7 7800 21662
San Casciano in Val di Pesa FI 8 17062 38724
Barberino Val d'Elsa FI 9 4386 43110
Impruneta FI 9 14615 57725
Montespertoli FI 14 13537 71262
Castellina in Chianti SI 15 2859 74121
Radda in Chianti SI 17 1613 75734
Poggibonsi SI 17 29196 104930
Certaldo FI 17 16121 121051
Bagno a Ripoli FI 18 25611 146662
Scandicci FI 18 50609 197271
Figline e Incisa Valdarno FI 18 23505 220776
Firenze FI 19 382808 603584

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km S of Scandicci (50609 inhabitants)
19 Km S of Firenze (382808 inhabitants)
32 Km N of Siena (53903 inhabitants)
33 Km SE of Prato (191150 inhabitants)
45 Km SE of Pistoia (90315 inhabitants)
54 Km W of Arezzo (99543 inhabitants)
65 Km E of Lucca (89046 inhabitants)
69 Km E of Pisa (89158 inhabitants)
75 Km E of Livorno (159219 inhabitants)
85 Km E of Viareggio (62467 inhabitants)
92 Km SW of Imola (69797 inhabitants)
92 Km SW of Faenza (58541 inhabitants)
94 Km N of Grosseto (82087 inhabitants)
94 Km SW of Forlì (117913 inhabitants)
100 Km S of Bologna (386663 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 1.3 2014-12-20
08:26:18		 43.6032 11.2412 11 2015-09-21
09:40:11		 Bollettino Sismico Italiano INGV 19959351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2014-12-20 08:26:18 ± 0.09
Latitude 43.6032 ± 0.0234
Longitude 11.2412 ± 0.0112
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 19959351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2574
Semi-minor axis of confidence ellipse (meter) 767
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 190
Circular confidence region, given by single value of horizontal uncertainty (meter) 2570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 0.45775
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 1
Type of magnitude ML
Reference to an origin 19959351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-06-27 22:44:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2014-12-20T08:26:33.80 0.6 undecidable manual S 64 48.9177 50 0.09 46
IV.RUFI.EHZ. 2014-12-20T08:26:29.20 0.6 undecidable manual S 39 33.744 50 -0.47 44
IV.CRMI.HHE. 2014-12-20T08:26:28.30 0.6 undecidable manual S 316 29.9478 50 -0.34 45
IV.MTCR.EHZ. 2014-12-20T08:26:27.65 0.3 undecidable manual P 338 50.8158 50 0.25 67
IV.ASQU.HHZ. 2014-12-20T08:26:27.51 0.3 undecidable manual P 64 48.9177 50 0.4 65
IV.CRMI.HHE. 2014-12-20T08:26:24.27 0.1 undecidable manual P 316 29.9478 50 0.09 96
IV.CSNT.HHZ. 2014-12-20T08:26:24.20 0.6 undecidable manual S 165 14.9739 125 -0.25 48
IV.RUFI.EHZ. 2014-12-20T08:26:24.64 0.1 undecidable manual P 39 33.744 50 -0.13 94
IV.OSSC.HHZ. 2014-12-20T08:26:22.80 0.3 undecidable manual S 178 8.88 140 -0.07 75
IV.CSNT.HHZ. 2014-12-20T08:26:21.75 0.1 positive manual P 165 14.9739 125 -0.01 100
IV.OSSC.HHZ. 2014-12-20T08:26:20.96 0.1 positive manual P 178 8.88 140 0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.6 0.0005135000000000001 0.62 AML other m 2014-12-20T08:26:23.23
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