Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 04-04-2017 and time 14:17:13 (Italy) in region 4 km E Castelfiorentino (FI)

A magnitude ML 1.4 earthquake occured in region: 4 km E Castelfiorentino (FI), on

  • 04-04-2017 12:17:13 (UTC)
  • 04-04-2017 14:17:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6180, 11.0160 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
Castelfiorentino FI 4 17504 17504
Montespertoli FI 6 13537 31041
Certaldo FI 8 16121 47162
Gambassi Terme FI 10 4870 52032
Montaione FI 11 3700 55732
Montelupo Fiorentino FI 13 14098 69830
Empoli FI 13 48109 117939
Tavarnelle Val di Pesa FI 14 7800 125739
San Casciano in Val di Pesa FI 14 17062 142801
Capraia e Limite FI 14 7670 150471
San Miniato PI 15 27934 178405
Barberino Val d'Elsa FI 15 4386 182791
San Gimignano SI 17 7820 190611
Lastra a Signa FI 19 20156 210767
Cerreto Guidi FI 19 10870 221637
Signa FI 20 19179 240816
Palaia PI 20 4612 245428
Poggibonsi SI 20 29196 274624

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km SW of Scandicci (50609 inhabitants)
26 Km SW of Firenze (382808 inhabitants)
30 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)
51 Km E of Pisa (89158 inhabitants)
57 Km E of Livorno (159219 inhabitants)
68 Km E of Viareggio (62467 inhabitants)
72 Km W of Arezzo (99543 inhabitants)
84 Km SE of Massa (69479 inhabitants)
90 Km SE of Carrara (63133 inhabitants)
96 Km N of Grosseto (82087 inhabitants)
99 Km SW of Imola (69797 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 1.4 2017-04-04
12:17:13		 43.6183 11.0165 10 2018-01-10
09:56:14		 Bollettino Sismico Italiano INGV 50283851
Reviewed
Rev100 		ML 1.4 2017-04-04
12:17:13		 43.615 11.0082 10 2017-04-04
12:25:12		 Sala Sismica INGV-Roma 43369861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-04 12:17:13 ± 0.11
Latitude 43.6183 ± 0.0045
Longitude 11.0165 ± 0.0087
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 50283851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 565
Semi-minor axis of confidence ellipse (meter) 415
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.83457
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 43369861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-04-04 12:25:12

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 50283851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-10-04 15:19:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VAGA.HHZ. 2017-04-04T12:18:41.17 3.0 undecidable manual Sn -0.98 0
GU.TRAV.HHZ. 2017-04-04T12:18:36.11 3.0 undecidable manual Sn -0.1 0
IV.LRP.HHZ. 2017-04-04T12:18:29.96 3.0 undecidable manual Sn 0.18 0
IV.T1299.EHZ. 2017-04-04T12:18:15.40 3.0 undecidable manual Sg 5.32 0
IV.EUCT.HNZ. 2017-04-04T12:18:13.12 3.0 undecidable manual Sn -0.41 0
IV.T1212.EHZ. 2017-04-04T12:18:11.24 3.0 undecidable manual Sg 6.31 0
IV.LEOD.HNZ. 2017-04-04T12:17:51.53 3.0 negative manual Pg 6.3 0
IV.CASP.HHZ. 2017-04-04T12:17:30.33 0.3 undecidable manual P 188 92.6406 50 1.3 41
GU.POPM.HHZ. 2017-04-04T12:17:29.60 0.3 undecidable manual S 336 51.7038 50 -0.08 70
IV.MAGO.HHN. 2017-04-04T12:17:28.44 1.0 undecidable manual S 217 47.9187 50 -0.25 23
IV.RUFI.EHZ. 2017-04-04T12:17:28.26 0.3 undecidable manual S 58 46.4202 50 -0.02 72
GU.SARM.EHZ. 2017-04-04T12:17:27.46 0.3 undecidable manual P 322 79.7646 50 0.42 62
IV.MOCL.EHZ. 2017-04-04T12:17:27.88 0.3 undecidable manual S 17 44.8218 50 0.02 72
IV.FROS.HHZ. 2017-04-04T12:17:27.86 0.3 undecidable manual S 166 46.7199 50 -0.5 65
IV.MTCR.EHZ. 2017-04-04T12:17:27.77 0.3 undecidable manual S 359 45.4212 50 -0.25 68
IV.PII.HHZ. 2017-04-04T12:17:25.79 0.3 undecidable manual S 286 41.0256 50 -1.07 51
IV.BDI.HHZ. 2017-04-04T12:17:24.25 0.3 undecidable manual P 326 59.6958 50 0.3 66
GU.MAIM.HHZ. 2017-04-04T12:17:23.03 0.1 undecidable manual P 308 53.3022 50 0.06 94
IV.CSNT.HHZ. 2017-04-04T12:17:22.84 0.3 undecidable manual S 126 27.2505 50 -0.33 70
IV.MAGO.HHN. 2017-04-04T12:17:22.31 0.1 undecidable manual P 217 47.9187 50 0.16 93
IV.RUFI.EHZ. 2017-04-04T12:17:22.12 0.1 undecidable manual P 58 46.4202 50 0.21 92
GU.POPM.HHZ. 2017-04-04T12:17:22.93 0.1 undecidable manual P 336 51.7038 50 0.21 91
IV.FROS.HHZ. 2017-04-04T12:17:22.13 0.1 undecidable manual P 166 46.7199 50 0.18 93
IV.MTCR.EHZ. 2017-04-04T12:17:21.98 0.1 undecidable manual P 359 45.4212 50 0.22 92
IV.MOCL.EHZ. 2017-04-04T12:17:21.83 0.3 undecidable manual P 17 44.8218 50 0.16 70
IV.PII.HHZ. 2017-04-04T12:17:21.01 0.1 undecidable manual P 286 41.0256 50 -0.07 96
IV.OSSC.HHZ. 2017-04-04T12:17:21.12 0.3 undecidable manual S 120 21.2676 115 -0.22 72
IV.CRMI.HHZ. 2017-04-04T12:17:20.55 0.3 undecidable manual S 351 19.869 117 -0.37 70
IV.CSNT.HHZ. 2017-04-04T12:17:18.80 0.1 undecidable manual P 126 27.2505 50 -0.16 96
IV.CRMI.HHZ. 2017-04-04T12:17:17.58 0.1 undecidable manual P 351 19.869 117 -0.08 99
IV.OSSC.HHZ. 2017-04-04T12:17:17.92 0.1 negative manual P 120 21.2676 115 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHN. ML:1.4 0.00017299999999999998 1.48 AML other m 2017-04-04T12:17:20.02
IV.CRMI.HHE. ML:1.6 0.000311 1.4 AML other m 2017-04-04T12:17:21.70
IV.OSSC.HHN. ML:1.4 0.0001915 1.12 AML other m 2017-04-04T12:17:21.36
IV.OSSC.HHE. ML:1.4 0.000184 0.4 AML other m 2017-04-04T12:17:22.52
IV.CSNT.HHN. ML:1.2 0.00009584999999999999 1.08 AML other m 2017-04-04T12:17:24.25
IV.PII.HHE. ML:1.8 0.0002265 0.22 AML other m 2017-04-04T12:17:26.03
IV.CSNT.HHE. ML:1.2 0.00007300000000000001 1.1 AML other m 2017-04-04T12:17:26.72
IV.PII.HHN. ML:1.9 0.00026549999999999995 0.2 AML other m 2017-04-04T12:17:26.30
IV.FROS.HHE. ML:1.9 0.00023099999999999998 0.3 AML other m 2017-04-04T12:17:28.16
IV.FROS.HHN. ML:1.8 0.0001735 0.7 AML other m 2017-04-04T12:17:28.43
IV.MTCR.EHE. ML:1.3 0.000056149999999999996 0.58 AML other m 2017-04-04T12:17:28.52
IV.MAGO.HHN. ML:1.4 0.0000737 0.82 AML other m 2017-04-04T12:17:29.42
IV.MAGO.HHE. ML:1.3 0.00005795 1.24 AML other m 2017-04-04T12:17:29.09
IV.MTCR.EHN. ML:1.2 0.00004825 0.62 AML other m 2017-04-04T12:17:29.50
GU.POPM.HHN. ML:1.5 0.00007405000000000001 0.36 AML other m 2017-04-04T12:17:30.66
GU.POPM.HHE. ML:1.4 0.0000699 1.38 AML other m 2017-04-04T12:17:31.13
IV.BDI.HHE. ML:1.0 0.0000211 0.06 AML other m 2017-04-04T12:17:43.43
IV.BDI.HHN. ML:0.9 0.00001585 0.06 AML other m 2017-04-04T12:17:48.38
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