Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 30-11-2020 and time 21:35:38 (Italy) in region 7 km SE Firenzuola (FI)

A magnitude ML 1.6 earthquake occured in region: 7 km SE Firenzuola (FI), on

  • 30-11-2020 20:35:38 (UTC)
  • 30-11-2020 21:35:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0660, 11.4180 at 9 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
Firenzuola FI 7 4726 4726
Palazzuolo sul Senio FI 12 1154 5880
Borgo San Lorenzo FI 13 18211 24091
Scarperia e San Piero FI 14 12217 36308
Vicchio FI 15 8044 44352
Marradi FI 16 3139 47491
Barberino di Mugello FI 16 10836 58327
Castel del Rio BO 18 1246 59573
Monghidoro BO 19 3749 63322

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NE of Prato (191150 inhabitants)
35 Km NE of Firenze (382808 inhabitants)
39 Km NE of Scandicci (50609 inhabitants)
40 Km SW of Imola (69797 inhabitants)
43 Km E of Pistoia (90315 inhabitants)
45 Km SW of Faenza (58541 inhabitants)
48 Km S of Bologna (386663 inhabitants)
53 Km W of Forlì (117913 inhabitants)
66 Km W of Cesena (96758 inhabitants)
74 Km SW of Ravenna (159116 inhabitants)
75 Km SE of Modena (184973 inhabitants)
76 Km NW of Arezzo (99543 inhabitants)
77 Km E of Lucca (89046 inhabitants)
83 Km N of Siena (53903 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
90 Km SE of Carpi (70699 inhabitants)
90 Km E of Pisa (89158 inhabitants)
92 Km W of Rimini (147750 inhabitants)
94 Km SE of Reggio nell'Emilia (171345 inhabitants)
96 Km E of Viareggio (62467 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 1.6 2020-11-30
20:35:38		 44.0662 11.4177 9 2021-02-26
14:56:10		 Bollettino Sismico Italiano INGV 85425431
Reviewed
Rev100 		ML 1.6 2020-11-30
20:35:38		 44.0693 11.419 9 2020-11-30
20:41:23		 Sala Sismica INGV-Roma 85113251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-30 20:35:38 ± 0.06
Latitude 44.0662 ± 0.0027
Longitude 11.4177 ± 0.0038
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85425431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 352
Semi-minor axis of confidence ellipse (meter) 294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 236
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 34
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.04407
Epicentral distance of station farthest from the epicenter (degree) 0.72935
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 85425431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-28 15:43:42

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 85113251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-30 20:41:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BDI.HNZ. 2020-11-30T20:35:59.09 0.6 undecidable manual S 270 65.49 50 0.33 43
IV.CSNT.HHZ. 2020-11-30T20:35:58.84 0.3 undecidable manual S 189 66.5778 50 -0.2 66
GU.POPM.HHZ. 2020-11-30T20:35:55.73 0.3 undecidable manual S 268 52.7028 50 0.38 65
IV.ASQU.HHZ. 2020-11-30T20:35:52.80 0.3 undecidable manual S 135 42.1245 50 0.28 67
IV.PII.HHZ. 2020-11-30T20:35:52.86 0.6 undecidable manual P 242 80.9523 50 0.32 41
IV.CRE.HHZ. 2020-11-30T20:35:50.79 0.6 undecidable manual P 139 65.49 50 0.63 39
IV.CSNT.HHZ. 2020-11-30T20:35:50.02 0.3 undecidable manual P 189 66.5778 50 -0.3 64
IV.BRIS.HHZ. 2020-11-30T20:35:50.24 0.3 undecidable manual S 58 32.8449 50 0.19 70
IV.BDI.HNZ. 2020-11-30T20:35:50.47 0.3 undecidable manual P 270 65.49 50 0.3 64
IT.FIE.HGZ. 2020-11-30T20:35:48.96 0.3 undecidable manual S 199 30.3474 50 -0.42 67
IV.ZCCA.HHZ. 2020-11-30T20:35:48.18 0.6 undecidable manual P 312 47.2194 50 0.84 37
IV.RUFI.EHZ. 2020-11-30T20:35:48.03 0.3 undecidable manual S 164 26.3514 109 -0.09 72
GU.POPM.HHZ. 2020-11-30T20:35:48.09 0.6 negative manual P 268 52.7028 50 -0.1 46
IV.MPPT.EHZ. 2020-11-30T20:35:48.63 0.6 undecidable manual S 245 28.749 108 -0.28 46
IV.RINC.HHZ. 2020-11-30T20:35:47.74 0.3 undecidable manual S 143 25.0527 110 0.06 73
IV.FNVD.HHZ. 2020-11-30T20:35:47.80 0.3 undecidable manual S 296 26.0517 110 -0.22 70
IT.FAZ.HNZ. 2020-11-30T20:35:46.93 0.3 undecidable manual P 55 45.621 50 -0.17 69
IV.ASQU.HHZ. 2020-11-30T20:35:46.39 0.1 undecidable manual P 135 42.1245 50 -0.17 92
IV.CRMI.HNN. 2020-11-30T20:35:46.93 0.1 undecidable manual P 230 46.1205 50 -0.24 90
IV.MOCL.EHZ. 2020-11-30T20:35:46.41 0.3 undecidable manual S 250 20.0688 115 0.31 70
IV.BRIS.HHZ. 2020-11-30T20:35:45.12 0.1 undecidable manual P 58 32.8449 50 -0.02 96
IV.MPPT.EHZ. 2020-11-30T20:35:44.24 0.1 undecidable manual P 245 28.749 108 -0.23 93
IV.MTRZ.HHZ. 2020-11-30T20:35:44.43 0.1 undecidable manual P 1 27.3504 109 0.22 93
IT.FIE.HGZ. 2020-11-30T20:35:44.48 0.3 undecidable manual P 199 30.3474 50 -0.27 69
IV.RUFI.EHZ. 2020-11-30T20:35:43.82 0.6 positive manual P 164 26.3514 109 -0.2 47
IV.RONT.HHZ. 2020-11-30T20:35:43.02 0.3 undecidable manual S 171 8.1807 139 0.31 71
IV.RINC.HHZ. 2020-11-30T20:35:43.61 0.1 undecidable manual P 143 25.0527 110 -0.16 95
IV.VISG.HHZ. 2020-11-30T20:35:43.76 0.3 undecidable manual S 6 13.6752 124 -0.41 69
IV.FNVD.HHZ. 2020-11-30T20:35:43.63 0.1 undecidable manual P 296 26.0517 110 -0.33 91
IV.SEI.HHZ. 2020-11-30T20:35:42.21 0.1 undecidable manual S 254 4.8951 152 0.14 99
IV.MOCL.EHZ. 2020-11-30T20:35:42.92 0.1 positive manual P 250 20.0688 115 0.07 98
IV.VISG.HHZ. 2020-11-30T20:35:41.56 0.1 undecidable manual P 6 13.6752 124 -0.18 97
IV.RONT.HHZ. 2020-11-30T20:35:41.26 0.1 positive manual P 171 8.1807 139 0.36 94
IV.SEI.HHZ. 2020-11-30T20:35:40.60 0.1 undecidable manual P 254 4.8951 152 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHN. ML:2.9 0.015099999999999999 0.2 AML other m 2020-11-30T20:35:42.48
IV.SEI.HHE. ML:2.6 0.00662 0.76 AML other m 2020-11-30T20:35:42.71
IV.RONT.HHN. ML:2.6 0.005725 0.4 AML other m 2020-11-30T20:35:43.85
IV.VISG.HHE. ML:2.1 0.001445 0.82 AML other m 2020-11-30T20:35:44.81
IV.VISG.HHN. ML:2.2 0.00151 0.58 AML other m 2020-11-30T20:35:44.58
IV.RONT.HHE. ML:2.4 0.004085 0.18 AML other m 2020-11-30T20:35:45.29
IV.MOCL.EHE. ML:1.5 0.000241 0.4 AML other m 2020-11-30T20:35:46.17
IV.RINC.HHE. ML:1.3 0.00011999999999999999 0.32 AML other m 2020-11-30T20:35:47.96
IV.MOCL.EHN. ML:1.5 0.0002545 1.64 AML other m 2020-11-30T20:35:47.83
IV.FNVD.HHN. ML:1.8 0.000334 0.18 AML other m 2020-11-30T20:35:48.42
IV.RINC.HHN. ML:1.5 0.00017199999999999998 0.92 AML other m 2020-11-30T20:35:48.54
IV.FNVD.HHE. ML:1.8 0.0003545 0.68 AML other m 2020-11-30T20:35:48.62
IV.MTRZ.HHE. ML:1.6 0.00019 1.2 AML other m 2020-11-30T20:35:50.10
IV.MPPT.EHE. ML:1.3 0.00009279999999999999 1.52 AML other m 2020-11-30T20:35:50.92
IV.BRIS.HHE. ML:1.5 0.00014350000000000002 1.58 AML other m 2020-11-30T20:35:52.90
IV.MPPT.EHN. ML:1.1 0.00007025000000000001 0.48 AML other m 2020-11-30T20:35:52.43
IV.BRIS.HHN. ML:1.6 0.0001795 0.36 AML other m 2020-11-30T20:35:52.50
IV.MTRZ.HHN. ML:1.5 0.000175 0.6 AML other m 2020-11-30T20:35:52.58
GU.POPM.HHN. ML:1.7 0.000136 0.24 AML other m 2020-11-30T20:35:56.42
GU.POPM.HHE. ML:1.5 0.00007314999999999999 1.02 AML other m 2020-11-30T20:35:56.47
IV.CSNT.HHN. ML:1.4 0.00004235 0.42 AML other m 2020-11-30T20:35:59.67
IV.CSNT.HHE. ML:1.4 0.0000472 1.38 AML other m 2020-11-30T20:36:00.12
IV.PII.HHN. ML:1.4 0.0000363 0.8 AML other m 2020-11-30T20:36:08.36
IV.PII.HHE. ML:1.4 0.00003725 1.16 AML other m 2020-11-30T20:36:09.25
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