Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-02-2017 and time 20:15:08 (Italy) in region 2 km E Castelfiorentino (FI)

A magnitude ML 1.5 earthquake occured in region: 2 km E Castelfiorentino (FI), on

  • 20-02-2017 19:15:08 (UTC)
  • 20-02-2017 20:15:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.6130, 11.0020 at 8 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
Castelfiorentino FI 3 17504 17504
Montespertoli FI 7 13537 31041
Certaldo FI 8 16121 47162
Gambassi Terme FI 9 4870 52032
Montaione FI 10 3700 55732
Empoli FI 13 48109 103841
Montelupo Fiorentino FI 13 14098 117939
San Miniato PI 14 27934 145873
Capraia e Limite FI 15 7670 153543
Tavarnelle Val di Pesa FI 15 7800 161343
San Casciano in Val di Pesa FI 16 17062 178405
Barberino Val d'Elsa FI 16 4386 182791
San Gimignano SI 16 7820 190611
Palaia PI 18 4612 195223
Cerreto Guidi FI 19 10870 206093
Lastra a Signa FI 20 20156 226249
Poggibonsi SI 20 29196 255445

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Scandicci (50609 inhabitants)
27 Km SW of Firenze (382808 inhabitants)
31 Km S of Prato (191150 inhabitants)
36 Km S of Pistoia (90315 inhabitants)
42 Km NW of Siena (53903 inhabitants)
48 Km SE of Lucca (89046 inhabitants)
50 Km E of Pisa (89158 inhabitants)
56 Km E of Livorno (159219 inhabitants)
67 Km E of Viareggio (62467 inhabitants)
73 Km W of Arezzo (99543 inhabitants)
84 Km SE of Massa (69479 inhabitants)
89 Km SE of Carrara (63133 inhabitants)
95 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 		ML 1.5 2017-02-20
19:15:08		 43.6127 11.002 9 2018-01-10
09:51:17		 Bollettino Sismico Italiano INGV 49797641
Reviewed
Rev100 		ML 1.5 2017-02-20
19:15:08		 43.6158 11.0098 9 2017-02-20
19:28:45		 Sala Sismica INGV-Roma 41389631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-02-20 19:15:08 ± 0.1
Latitude 43.6127 ± 0.0036
Longitude 11.0020 ± 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 49797641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 405
Semi-minor axis of confidence ellipse (meter) 266
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 238
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 48
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.91281
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 44
Type of magnitude ML
Reference to an origin 49797641
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-10-26 17:45:44

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 41389631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-02-20 19:28:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TREG.HNZ. 2017-02-20T19:16:06.45 3.0 undecidable manual Sg 0.37 0
IV.ZONE.HHZ. 2017-02-20T19:15:48.72 3.0 undecidable manual P 2.57 0
IV.EUCT.HNZ. 2017-02-20T19:15:42.69 3.0 negative manual P -1.17 0
TV.SF13.HHE. 2017-02-20T19:15:37.31 0.6 undecidable manual S 150 101.3208 50 -0.94 32
IV.ARCI.HHN. 2017-02-20T19:15:36.62 0.6 undecidable manual S 155 92.6406 50 0.67 37
GU.EQUI.HHZ. 2017-02-20T19:15:35.97 0.6 undecidable manual S 312 91.5417 50 0.33 41
IV.CASP.HHZ. 2017-02-20T19:15:35.71 0.6 undecidable manual S 187 91.8414 50 -0.02 44
IV.LMD.HHZ. 2017-02-20T19:15:32.25 0.6 undecidable manual S 47 76.4679 50 0.63 39
GU.SARM.EHZ. 2017-02-20T19:15:32.91 0.6 undecidable manual S 323 79.5648 50 0.46 41
MN.VLC.HHE. 2017-02-20T19:15:31.99 0.6 undecidable manual S 321 78.0663 50 -0.07 45
IV.CRE.HHZ. 2017-02-20T19:15:31.84 0.6 undecidable manual S 89 76.2681 50 0.27 43
IV.ASQU.HHZ. 2017-02-20T19:15:28.55 0.6 undecidable manual S 72 66.378 50 -0.38 43
IV.BDI.HHZ. 2017-02-20T19:15:27.44 0.6 undecidable manual S 327 59.5959 50 0.32 44
GU.CARD.HHZ. 2017-02-20T19:15:27.80 0.6 undecidable manual S 318 61.8936 50 0.06 46
IV.SEI.HHZ. 2017-02-20T19:15:26.52 0.6 undecidable manual S 30 56.6988 50 0.18 45
TV.SF13.HHE. 2017-02-20T19:15:26.06 0.1 positive manual P 150 101.3208 50 0.52 77
IV.TRIF.HHZ. 2017-02-20T19:15:25.63 0.3 undecidable manual S 188 55.7997 50 -0.48 64
IV.CASP.HHZ. 2017-02-20T19:15:24.87 0.3 undecidable manual P 187 91.8414 50 0.78 53
GU.EQUI.HHZ. 2017-02-20T19:15:24.46 0.6 undecidable manual P 312 91.5417 50 0.42 40
GU.MAIM.HHZ. 2017-02-20T19:15:24.62 0.3 undecidable manual S 309 52.8027 50 -0.7 59
IV.ARCI.HHN. 2017-02-20T19:15:24.58 0.1 negative manual P 155 92.6406 50 0.36 81
IV.MTCR.EHZ. 2017-02-20T19:15:23.08 0.6 undecidable manual S 0 46.0206 50 -0.43 44
IV.MOCL.EHZ. 2017-02-20T19:15:23.18 0.6 undecidable manual S 18 45.8208 50 -0.26 45
IV.MAGO.HHZ. 2017-02-20T19:15:23.84 0.6 undecidable manual S 216 46.7199 50 0.15 46
IV.RUFI.EHZ. 2017-02-20T19:15:23.50 0.6 undecidable manual S 58 47.7189 50 -0.46 43
IV.CRE.HHZ. 2017-02-20T19:15:22.43 0.1 undecidable manual P 89 76.2681 50 0.74 74
GU.SARM.EHZ. 2017-02-20T19:15:22.61 0.6 undecidable manual P 323 79.5648 50 0.42 41
IV.FROS.HHZ. 2017-02-20T19:15:22.84 0.3 undecidable manual S 164 46.4202 50 -0.76 58
MN.VLC.HHE. 2017-02-20T19:15:22.08 0.1 positive manual P 321 78.0663 50 0.11 88
IV.LMD.HHZ. 2017-02-20T19:15:21.89 0.1 undecidable manual P 47 76.4679 50 0.18 87
IV.MPPT.EHZ. 2017-02-20T19:15:21.28 0.6 undecidable manual S 10 38.9277 50 -0.31 45
IV.PII.HHZ. 2017-02-20T19:15:20.96 0.6 undecidable manual S 288 40.1265 50 -0.97 36
IV.ASQU.HHZ. 2017-02-20T19:15:20.34 0.3 undecidable manual P 72 66.378 50 0.18 67
GU.CARD.HHZ. 2017-02-20T19:15:19.46 0.1 negative manual P 318 61.8936 50 -0.01 93
IV.BDI.HHZ. 2017-02-20T19:15:19.25 0.3 undecidable manual P 327 59.5959 50 0.13 68
GU.MAIM.HHZ. 2017-02-20T19:15:18.05 0.1 negative manual P 309 52.8027 50 -0.03 94
IV.TRIF.HHZ. 2017-02-20T19:15:18.59 0.1 negative manual P 188 55.7997 50 0.06 93
IV.SEI.HHZ. 2017-02-20T19:15:18.89 0.3 undecidable manual P 30 56.6988 50 0.22 67
IV.FROS.HHZ. 2017-02-20T19:15:17.03 0.1 positive manual P 164 46.4202 50 -0.05 95
IV.RUFI.EHZ. 2017-02-20T19:15:17.05 0.1 positive manual P 58 47.7189 50 -0.25 91
IV.MTCR.EHZ. 2017-02-20T19:15:17.04 0.1 negative manual P 0 46.0206 50 0 96
IV.CSNT.HHZ. 2017-02-20T19:15:17.79 0.6 undecidable manual S 124 27.8499 107 -0.51 44
IV.MAGO.HHZ. 2017-02-20T19:15:17.23 0.1 positive manual P 216 46.7199 50 0.09 94
IV.OSSC.HHZ. 2017-02-20T19:15:16.31 0.6 undecidable manual S 117 21.9669 111 -0.05 50
IV.PII.HHZ. 2017-02-20T19:15:16.06 0.1 negative manual P 288 40.1265 50 -0.06 96
IV.MOCL.EHZ. 2017-02-20T19:15:16.70 0.1 positive manual P 18 45.8208 50 -0.29 90
IV.CRMI.HHZ. 2017-02-20T19:15:15.64 0.6 undecidable manual S 355 20.3685 113 -0.21 48
IV.MPPT.EHZ. 2017-02-20T19:15:15.69 0.3 undecidable manual P 10 38.9277 50 -0.24 69
IV.CSNT.HHZ. 2017-02-20T19:15:13.68 0.1 negative manual P 124 27.8499 107 -0.35 92
IV.CRMI.HHZ. 2017-02-20T19:15:12.66 0.1 positive manual P 355 20.3685 113 0.05 99
IV.OSSC.HHZ. 2017-02-20T19:15:12.91 0.1 negative manual P 117 21.9669 111 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HNN. ML:1.7 0.00038574295 0.4992 AML other m 2017-02-20T19:15:16.10
IV.CRMI.HHE. ML:1.7 0.000391 1.36 AML other m 2017-02-20T19:15:16.08
IV.OSSC.HNE. ML:1.6 0.00027754695000000004 0.9216 AML other m 2017-02-20T19:15:16.84
IV.CRMI.HHN. ML:1.5 0.00025550000000000003 0.82 AML other m 2017-02-20T19:15:16.51
IV.OSSC.HHN. ML:1.5 0.000222 0.26 AML other m 2017-02-20T19:15:16.85
IV.OSSC.HNN. ML:1.7 0.00035270305 0.8192 AML other m 2017-02-20T19:15:16.60
IV.CRMI.HNE. ML:1.7 0.00037476549999999995 1.3568 AML other m 2017-02-20T19:15:16.43
IV.OSSC.HHE. ML:1.6 0.00027800000000000004 0.44 AML other m 2017-02-20T19:15:17.01
IV.CSNT.HHE. ML:1.3 0.0000983 0.14 AML other m 2017-02-20T19:15:18.37
IV.CSNT.HHN. ML:1.2 0.00009685 0.34 AML other m 2017-02-20T19:15:19.47
IV.MPPT.EHE. ML:1.4 0.00008874999999999999 0.38 AML other m 2017-02-20T19:15:21.28
IV.PII.HHN. ML:1.9 0.0002615 1.14 AML other m 2017-02-20T19:15:21.16
IV.PII.HHE. ML:1.8 0.0002395 0.26 AML other m 2017-02-20T19:15:22.02
IV.MPPT.EHN. ML:1.4 0.000088336765 0.1408 AML other m 2017-02-20T19:15:21.97
IV.FROS.HHE. ML:2.0 0.000288 1.32 AML other m 2017-02-20T19:15:23.25
IV.FROS.HHN. ML:1.8 0.00020600000000000002 0.64 AML other m 2017-02-20T19:15:23.26
IV.MAGO.HHN. ML:1.4 0.00007465 0.42 AML other m 2017-02-20T19:15:23.96
IV.RUFI.EHE. ML:1.5 0.000083844225 0.8576 AML other m 2017-02-20T19:15:24.12
IV.MOCL.EHN. ML:1.5 0.00009705 0.8 AML other m 2017-02-20T19:15:24.36
IV.RUFI.EHN. ML:1.3 0.00005431761 2.7136 AML other m 2017-02-20T19:15:25.77
IV.MOCL.EHE. ML:1.4 0.0000808 0.22 AML other m 2017-02-20T19:15:24.72
IV.MTCR.EHE. ML:1.5 0.00008505000000000001 0.2 AML other m 2017-02-20T19:15:24.79
IV.MAGO.HHE. ML:1.4 0.00006994999999999999 0.1 AML other m 2017-02-20T19:15:24.90
GU.MAIM.HHE. ML:1.1 0.000027678880000000002 0.2688 AML other m 2017-02-20T19:15:24.94
GU.MAIM.HHN. ML:1.2 0.00003452566 0.2944 AML other m 2017-02-20T19:15:24.81
IV.TRIF.HHN. ML:1.6 0.0000969 1.12 AML other m 2017-02-20T19:15:26.79
IV.MTCR.EHN. ML:1.4 0.00006254999999999999 1.18 AML other m 2017-02-20T19:15:26.82
IV.BDI.HNN. ML:1.9 0.00016393370000000003 2.4064 AML other m 2017-02-20T19:15:27.20
IV.TRIF.HHE. ML:1.7 0.0001128 0.46 AML other m 2017-02-20T19:15:27.76
IV.ASQU.HHE. ML:1.3 0.000035799999999999996 0.48 AML other m 2017-02-20T19:15:29.41
IV.SEI.HHE. ML:1.7 0.00010719999999999999 0.9 AML other m 2017-02-20T19:15:29.48
IV.BDI.HHN. ML:1.0 0.00001755 0.98 AML other m 2017-02-20T19:15:30.51
IV.BDI.HNE. ML:1.9 0.00016858165 4.288 AML other m 2017-02-20T19:15:30.36
IV.ASQU.HHN. ML:1.4 0.00003785 0.26 AML other m 2017-02-20T19:15:30.60
IV.BDI.HHE. ML:1.0 0.0000205 0.9 AML other m 2017-02-20T19:15:31.03
IV.LMD.HHE. ML:1.0 0.00001599515 2.7776 AML other m 2017-02-20T19:15:33.21
IV.SEI.HHN. ML:1.8 0.0001365 1.66 AML other m 2017-02-20T19:15:31.83
IV.CRE.HHN. ML:1.2 0.000024105254999999998 1.6 AML other m 2017-02-20T19:15:33.01
IV.CRE.HHE. ML:1.1 0.000022023300000000003 1.5104 AML other m 2017-02-20T19:15:32.76
GU.SARM.EHE. ML:1.6 0.000051114809999999995 0.4736 AML other m 2017-02-20T19:15:34.46
IV.LMD.HHN. ML:1.2 0.000022725655000000002 1.8304 AML other m 2017-02-20T19:15:34.57
GU.SARM.EHN. ML:1.7 0.00006728471 0.6016 AML other m 2017-02-20T19:15:35.28
IV.CASP.HHE. ML:1.4 0.0000306 0.5 AML other m 2017-02-20T19:15:38.47
IV.CASP.HHN. ML:1.2 0.000020707465000000002 0.4608 AML other m 2017-02-20T19:15:39.36
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