Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 30-10-2016 and time 17:23:15 (UTC) in region 1 km S Castelfiorentino (FI)

A magnitude ML 1.4 earthquake occured in region: 1 km S Castelfiorentino (FI), on

  • 30-10-2016 17:23:15 (UTC)
  • 30-10-2016 18:23:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5950, 10.9730 at 7 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 1 17504 17504
Gambassi Terme FI 6 4870 22374
Montaione FI 7 3700 26074
Certaldo FI 8 16121 42195
Montespertoli FI 10 13537 55732
San Miniato PI 14 27934 83666
Empoli FI 14 48109 131775
San Gimignano SI 15 7820 139595
Montelupo Fiorentino FI 16 14098 153693
Palaia PI 16 4612 158305
Tavarnelle Val di Pesa FI 17 7800 166105
Capraia e Limite FI 17 7670 173775
Barberino Val d'Elsa FI 17 4386 178161
San Casciano in Val di Pesa FI 18 17062 195223
Montopoli in Val d'Arno PI 19 11148 206371
Fucecchio FI 20 23618 229989
Poggibonsi SI 20 29196 259185
Cerreto Guidi FI 20 10870 270055

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SW of Scandicci (50609 inhabitants)
30 Km SW of Firenze (382808 inhabitants)
33 Km SW of Prato (191150 inhabitants)
38 Km S of Pistoia (90315 inhabitants)
42 Km NW of Siena (53903 inhabitants)
47 Km SE of Lucca (89046 inhabitants)
48 Km E of Pisa (89158 inhabitants)
54 Km E of Livorno (159219 inhabitants)
66 Km E of Viareggio (62467 inhabitants)
75 Km W of Arezzo (99543 inhabitants)
83 Km SE of Massa (69479 inhabitants)
88 Km SE of Carrara (63133 inhabitants)
93 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 1.4 2016-10-30
17:23:15		 43.5947 10.9733 7 2017-05-16
08:51:45		 Bollettino Sismico Italiano INGV 45374901
Reviewed
Rev100 		ML 1.4 2016-10-30
17:23:15		 43.5947 11.0172 10 2016-10-30
17:28:25		 Sala Sismica INGV-Roma 31109101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-30 17:23:15 ± 0.18
Latitude 43.5947 ± 0.0126
Longitude 10.9733 ± 0.0174
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 45374901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1447
Semi-minor axis of confidence ellipse (meter) 1064
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 47
Circular confidence region, given by single value of horizontal uncertainty (meter) 1450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.20055
Epicentral distance of station farthest from the epicenter (degree) 0.48204
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.0
Num. used stations 3
Type of magnitude ML
Reference to an origin 45374901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-05-16 08:51:45

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 31109101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-10-30 17:28:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.MAIM.HHZ. 2016-10-30T17:23:32.32 0.6 undecidable manual S 313 52.4031 50 -0.87 38
IV.PII.HHZ. 2016-10-30T17:23:28.80 0.6 undecidable manual S 292 38.628 100 -0.71 42
GU.MAIM.HHZ. 2016-10-30T17:23:26.06 0.1 undecidable manual P 313 52.4031 50 0.19 95
IV.TRIF.HHZ. 2016-10-30T17:23:26.41 0.3 undecidable manual P 186 53.502 50 0.37 68
IV.CSNT.HHZ. 2016-10-30T17:23:25.72 0.6 undecidable manual S 118 28.8489 104 -0.45 47
IV.PII.HHZ. 2016-10-30T17:23:24.01 0.1 undecidable manual P 292 38.628 100 0.27 96
IV.CRMI.HHZ. 2016-10-30T17:23:23.95 0.6 undecidable manual S 1 22.2555 108 -0.04 52
IV.CSNT.HHZ. 2016-10-30T17:23:21.67 0.1 undecidable manual P 118 28.8489 104 -0.15 100
IV.CRMI.HHZ. 2016-10-30T17:23:20.88 0.1 undecidable manual P 1 22.2555 108 0.32 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1.3 0.0001175 0.54 AML other m 2016-10-30T17:23:29.89
IV.CSNT.HHN. ML:1.4 0.00012995000000000001 1.02 AML other m 2016-10-30T17:23:33.40
IV.OSSC.HHE. ML:1.3 0.00013350000000000002 0.7 AML other m 2016-10-30T17:23:37.75
IV.OSSC.HHN. ML:1.4 0.000161 0.64 AML other m 2016-10-30T17:23:38.22
IV.PII.HHE. ML:1.3 0.0000745 0.32 AML other m 2016-10-30T17:23:31.33
IV.PII.HHN. ML:1.4 0.00009290000000000001 0.7 AML other m 2016-10-30T17:23:53.60
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