Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 15-09-2019 and time 19:33:40 (Italy) in region 1 km NE Castelfiorentino (FI)

A magnitude ML 0.8 earthquake occured in region: 1 km NE Castelfiorentino (FI), on

  • 15-09-2019 17:33:40 (UTC)
  • 15-09-2019 19:33:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6150, 10.9830 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 1 17504 17504
Montespertoli FI 8 13537 31041
Gambassi Terme FI 9 4870 35911
Certaldo FI 9 16121 52032
Montaione FI 9 3700 55732
Empoli FI 12 48109 103841
San Miniato PI 13 27934 131775
Montelupo Fiorentino FI 13 14098 145873
Capraia e Limite FI 14 7670 153543
Tavarnelle Val di Pesa FI 16 7800 161343
Palaia PI 17 4612 165955
San Gimignano SI 17 7820 173775
San Casciano in Val di Pesa FI 17 17062 190837
Barberino Val d'Elsa FI 17 4386 195223
Cerreto Guidi FI 18 10870 206093
Fucecchio FI 19 23618 229711
Montopoli in Val d'Arno PI 19 11148 240859
Santa Croce sull'Arno PI 20 14601 255460
Vinci FI 20 14604 270064

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Scandicci (50609 inhabitants)
28 Km SW of Firenze (382808 inhabitants)
31 Km SW of Prato (191150 inhabitants)
36 Km S of Pistoia (90315 inhabitants)
43 Km NW of Siena (53903 inhabitants)
46 Km SE of Lucca (89046 inhabitants)
48 Km E of Pisa (89158 inhabitants)
55 Km E of Livorno (159219 inhabitants)
65 Km E of Viareggio (62467 inhabitants)
74 Km W of Arezzo (99543 inhabitants)
82 Km SE of Massa (69479 inhabitants)
88 Km SE of Carrara (63133 inhabitants)
96 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
Reviewed
Rev100 		ML 0.8 2019-09-15
17:33:40		 43.6147 10.9832 8 2019-09-15
18:22:41		 Sala Sismica INGV-Roma 72439571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-15 17:33:40 ± 0.13
Latitude 43.6147 ± 0.0045
Longitude 10.9832 ± 0.0087
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72439571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 571
Semi-minor axis of confidence ellipse (meter) 545
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 218
Circular confidence region, given by single value of horizontal uncertainty (meter) 570.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52790
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 12
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 72439571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-15 18:22:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTMR.EHZ. 2019-09-15T17:35:15.64 3.0 undecidable manual Sn -7.05 0
IV.SPS2.HHZ. 2019-09-15T17:34:55.06 3.0 undecidable manual Pn -2.53 0
IV.SAMA.HHZ. 2019-09-15T17:34:40.51 3.0 undecidable manual Sg -5.42 0
IV.TERO.HHZ. 2019-09-15T17:34:37.11 3.0 undecidable manual Sg 3.24 0
IV.SARZ.HHZ. 2019-09-15T17:34:34.88 3.0 undecidable manual Sg 4.49 0
IV.ARRO.EHZ. 2019-09-15T17:34:33.93 3.0 undecidable manual Sg 5.99 0
IV.MOMA.HHZ. 2019-09-15T17:34:18.10 3.0 undecidable manual Sn -3.52 0
IT.PLTA.HNZ. 2019-09-15T17:34:16.77 3.0 negative manual Pn -2.31 0
IV.VENL.HNZ. 2019-09-15T17:34:04.05 3.0 undecidable manual S 1.48 0
IV.BDI.HHE. 2019-09-15T17:34:00.05 0.3 undecidable manual S 328 58.5969 50 0.85 57
IV.SEI.HHE. 2019-09-15T17:33:59.21 0.6 undecidable manual S 31 57.2982 50 0.36 45
IV.MF5.EHZ. 2019-09-15T17:33:57.16 3.0 negative manual Pn -1.68 0
GU.POPM.HHZ. 2019-09-15T17:33:57.35 0.3 undecidable manual S 339 51.0156 50 0.16 71
GU.MAIM.HHE. 2019-09-15T17:33:56.76 0.3 undecidable manual S 310 51.5151 50 -0.56 65
IV.MAGO.CHE. 2019-09-15T17:33:56.29 0.3 undecidable manual S 215 46.0206 50 0.44 68
IV.RUFI.EHE. 2019-09-15T17:33:56.27 0.6 undecidable manual S 59 48.9177 50 -0.35 46
IV.FROS.CHE. 2019-09-15T17:33:55.60 0.3 undecidable manual S 163 47.0196 50 -0.51 67
IV.PII.HHZ. 2019-09-15T17:33:53.19 0.3 undecidable manual S 288 38.628 50 -0.69 63
IV.MPPT.EHE. 2019-09-15T17:33:53.59 0.6 undecidable manual S 13 39.0276 50 -0.38 46
IV.BDI.HHE. 2019-09-15T17:33:51.28 0.1 undecidable manual P 328 58.5969 50 0.01 97
IV.SEI.HHE. 2019-09-15T17:33:51.80 0.1 undecidable manual P 31 57.2982 50 0.73 80
IV.CSNT.HHZ. 2019-09-15T17:33:50.62 0.6 undecidable manual S 122 29.2485 105 -0.35 48
GU.MAIM.HHE. 2019-09-15T17:33:50.16 0.1 undecidable manual P 310 51.5151 50 -0.03 98
IV.ARVD.HHZ. 2019-09-15T17:33:49.11 3.0 positive manual Pn -1.02 0
IV.MAGO.CHE. 2019-09-15T17:33:49.54 0.1 undecidable manual P 215 46.0206 50 0.2 95
IV.RUFI.EHE. 2019-09-15T17:33:49.80 0.1 undecidable manual P 59 48.9177 50 0.02 98
GU.POPM.HHZ. 2019-09-15T17:33:49.86 0.1 undecidable manual P 339 51.0156 50 -0.25 93
IV.FROS.CHE. 2019-09-15T17:33:49.92 0.1 undecidable manual P 163 47.0196 50 0.43 91
IV.OSSC.HHZ. 2019-09-15T17:33:48.97 0.6 undecidable manual S 115 23.3544 109 -0.06 51
IV.PII.HHZ. 2019-09-15T17:33:48.17 0.1 undecidable manual P 288 38.628 50 -0.03 100
IV.MPPT.EHE. 2019-09-15T17:33:47.92 0.1 undecidable manual P 13 39.0276 50 -0.33 94
IV.CRMI.HHZ. 2019-09-15T17:33:47.89 0.6 undecidable manual S 359 20.0688 112 -0.06 51
IV.APEC.HNZ. 2019-09-15T17:33:46.29 3.0 positive manual P 0.19 0
IV.CSNT.HHZ. 2019-09-15T17:33:46.36 0.1 undecidable manual P 122 29.2485 105 -0.16 99
IV.CRMI.HHZ. 2019-09-15T17:33:45.02 0.6 negative manual P 359 20.0688 112 0.24 49
IV.OSSC.HHZ. 2019-09-15T17:33:45.52 0.3 negative manual P 115 23.3544 109 0.12 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHE. ML:0.7 0.00003575 0.62 AML other m 2019-09-15T17:33:48.35
IV.CRMI.HHN. ML:0.4 0.0000195 1.74 AML other m 2019-09-15T17:33:48.11
IV.OSSC.HHE. ML:0.8 0.00003915 0.2 AML other m 2019-09-15T17:33:49.22
IV.OSSC.HHN. ML:0.8 0.000039800000000000005 0.48 AML other m 2019-09-15T17:33:50.83
IV.PII.HHE. ML:1.2 0.00006165 0.16 AML other m 2019-09-15T17:33:53.28
IV.PII.HHN. ML:1.2 0.0000626 0.84 AML other m 2019-09-15T17:33:53.69
GU.POPM.HHN. ML:1.0 0.000027 1.84 AML other m 2019-09-15T17:33:58.94
IV.CSNT.HHE. ML:0.5 0.00001409342 0.1024 AML other m 2019-09-15T17:33:51.46
IV.CSNT.HHN. ML:0.5 0.0000143229195 0.1792 AML other m 2019-09-15T17:33:52.96
GU.POPM.HHE. ML:0.9 0.000019884289999999998 0.2304 AML other m 2019-09-15T17:33:59.37
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