Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 08-12-2019 and time 21:14:57 (Italy) in region 6 km N Scarperia e San Piero (FI)

A magnitude ML 1.7 earthquake occured in region: 6 km N Scarperia e San Piero (FI), on

  • 08-12-2019 20:14:57 (UTC)
  • 08-12-2019 21:14:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0190, 11.3180 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
Scarperia e San Piero FI 6 12217 12217
Barberino di Mugello FI 7 10836 23053
Borgo San Lorenzo FI 9 18211 41264
Firenzuola FI 12 4726 45990
Vaglia FI 13 5073 51063
Vernio PO 14 6060 57123
Vicchio FI 15 8044 65167
Vaiano PO 17 9895 75062
Cantagallo PO 17 3105 78167
Castiglione dei Pepoli BO 19 5648 83815

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Prato (191150 inhabitants)
28 Km N of Firenze (382808 inhabitants)
31 Km NE of Scandicci (50609 inhabitants)
33 Km E of Pistoia (90315 inhabitants)
49 Km SW of Imola (69797 inhabitants)
53 Km S of Bologna (386663 inhabitants)
54 Km SW of Faenza (58541 inhabitants)
62 Km W of Forlì (117913 inhabitants)
68 Km E of Lucca (89046 inhabitants)
75 Km W of Cesena (96758 inhabitants)
76 Km NW of Arezzo (99543 inhabitants)
76 Km SE of Modena (184973 inhabitants)
78 Km N of Siena (53903 inhabitants)
81 Km E of Pisa (89158 inhabitants)
83 Km SW of Ravenna (159116 inhabitants)
87 Km E of Viareggio (62467 inhabitants)
92 Km SE of Carpi (70699 inhabitants)
93 Km SE of Reggio nell'Emilia (171345 inhabitants)
94 Km E of Massa (69479 inhabitants)
94 Km S of Ferrara (133155 inhabitants)
96 Km NE of Livorno (159219 inhabitants)
98 Km E of Carrara (63133 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 1.7 2019-12-08
20:14:57		 44.0193 11.3185 8 2020-02-28
16:42:20		 Bollettino Sismico Italiano INGV 75909841
Reviewed
Rev100 		ML 1.5 2019-12-08
20:14:57		 44.0138 11.3257 7 2019-12-08
20:31:38		 Sala Sismica INGV-Roma 74441711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-08 20:14:57 ± 0.04
Latitude 44.0193 ± 0.0027
Longitude 11.3185 ± 0.0025
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75909841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 266
Semi-minor axis of confidence ellipse (meter) 122
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.40559
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 75909841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-17 16:34:53

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 74441711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-08 20:31:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SFI.HNN. 2019-12-08T20:15:12.35 0.3 undecidable manual S 107 44.0226 50 0.3 68
IV.ASQU.HHZ. 2019-12-08T20:15:12.55 0.6 undecidable manual S 123 45.0216 50 0.24 46
GU.POPM.HHZ. 2019-12-08T20:15:12.24 0.1 undecidable manual S 274 44.9217 50 -0.03 96
IV.CRMI.HNN. 2019-12-08T20:15:09.95 0.1 undecidable manual S 228 36.741 50 -0.15 95
IV.MTRZ.HNN. 2019-12-08T20:15:08.95 0.3 undecidable manual S 15 33.6441 103 -0.18 71
IV.LMD.HHZ. 2019-12-08T20:15:08.49 0.1 undecidable manual S 78 31.6461 104 0.03 98
IV.ASQU.HHZ. 2019-12-08T20:15:06.19 0.1 undecidable manual P 123 45.0216 50 0.29 91
IV.RUFI.EHZ. 2019-12-08T20:15:06.05 0.1 undecidable manual S 143 25.2525 108 -0.28 94
IT.FIE.HGZ. 2019-12-08T20:15:05.53 0.3 undecidable manual S 185 23.6541 109 -0.26 71
GU.POPM.HHZ. 2019-12-08T20:15:05.66 0.1 undecidable manual P 274 44.9217 50 -0.22 92
IV.SFI.HNN. 2019-12-08T20:15:05.60 0.3 undecidable manual P 107 44.0226 50 -0.15 70
IV.FNVD.HHZ. 2019-12-08T20:15:05.31 0.1 undecidable manual S 317 22.6551 109 -0.17 97
IV.CRMI.HNN. 2019-12-08T20:15:04.49 0.1 negative manual P 228 36.741 50 -0.13 95
IV.MTRZ.HNN. 2019-12-08T20:15:04.08 0.3 undecidable manual P 15 33.6441 103 0.01 74
IV.MPPT.EHZ. 2019-12-08T20:15:04.40 0.1 undecidable manual S 249 19.4694 112 -0.04 100
IV.LMD.HHZ. 2019-12-08T20:15:03.52 0.1 undecidable manual P 78 31.6461 104 -0.16 96
IV.FIR.HHZ. 2019-12-08T20:15:03.14 0.3 undecidable manual P 191 27.6501 106 0.23 71
IV.FNVD.HHZ. 2019-12-08T20:15:02.08 0.1 undecidable manual P 317 22.6551 109 0.12 98
IV.MOCL.EHZ. 2019-12-08T20:15:02.04 0.1 undecidable manual S 262 11.0778 126 0.16 99
IT.FIE.HGZ. 2019-12-08T20:15:02.12 0.3 undecidable manual P 185 23.6541 109 -0.02 75
IV.RUFI.EHZ. 2019-12-08T20:15:02.47 0.1 positive manual P 143 25.2525 108 0.02 99
IV.MPPT.EHZ. 2019-12-08T20:15:01.55 0.1 positive manual P 249 19.4694 112 0.19 97
IV.MOCL.EHZ. 2019-12-08T20:15:00.22 0.1 undecidable manual P 262 11.0778 126 0.34 95
IV.SEI.HHZ. 2019-12-08T20:14:58.08 3.0 undecidable manual S 4.995 -2.33 0
IV.SEI.HHZ. 2019-12-08T20:14:56.66 3.0 positive manual P 4.995 -2.37 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHN. ML:1.6 0.0005859516499999999 0.2432 AML other m 2019-12-08T20:15:02.10
IV.MOCL.EHE. ML:1.6 0.00046939125 0.128 AML other m 2019-12-08T20:15:02.29
IV.MPPT.EHN. ML:1.7 0.00036899499999999995 0.1408 AML other m 2019-12-08T20:15:05.17
IV.MPPT.EHE. ML:1.5 0.00024892955 0.1408 AML other m 2019-12-08T20:15:05.24
IV.FIR.HNN. ML:1.8 0.00033718425 0.1536 AML other m 2019-12-08T20:15:07.76
IV.FIR.HHN. ML:1.8 0.00037654200000000006 0.1536 AML other m 2019-12-08T20:15:07.77
IV.FIR.HNE. ML:1.8 0.00036184855 0.1536 AML other m 2019-12-08T20:15:08.02
IV.FIR.HHE. ML:1.9 0.0003987409 0.1536 AML other m 2019-12-08T20:15:08.02
IV.LMD.HHE. ML:1.6 0.000190521 0.1152 AML other m 2019-12-08T20:15:08.80
IV.LMD.HHN. ML:1.9 0.00040395165 0.1152 AML other m 2019-12-08T20:15:08.74
IV.ASQU.HHE. ML:1.2 0.00004300679 0.3072 AML other m 2019-12-08T20:15:13.56
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