Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 06-12-2019 and time 16:32:19 (UTC) in region 6 km S Radicondoli (SI)

A magnitude ML 1.9 earthquake occured in region: 6 km S Radicondoli (SI), on

  • 06-12-2019 16:32:19 (UTC)
  • 06-12-2019 17:32:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2080, 11.0320 at 6 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
Radicondoli SI 6 914 914
Chiusdino SI 7 1903 2817
Montieri GR 9 1204 4021
Castelnuovo di Val di Cecina PI 10 2231 6252
Monticiano SI 14 1571 7823
Casole d'Elsa SI 15 3897 11720
Monterotondo Marittimo GR 16 1371 13091
Pomarance PI 16 5897 18988
Sovicille SI 18 10116 29104

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km W of Siena (53903 inhabitants)
50 Km N of Grosseto (82087 inhabitants)
63 Km S of Scandicci (50609 inhabitants)
65 Km S of Firenze (382808 inhabitants)
70 Km SE of Livorno (159219 inhabitants)
75 Km W of Arezzo (99543 inhabitants)
75 Km S of Prato (191150 inhabitants)
76 Km SE of Pisa (89158 inhabitants)
81 Km S of Pistoia (90315 inhabitants)
83 Km SE of Lucca (89046 inhabitants)
97 Km SE 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 1.9 2019-12-06
16:32:19		 43.2077 11.0322 6 2020-02-28
16:42:19		 Bollettino Sismico Italiano INGV 75726011
Reviewed
Rev100 		ML 2.1 2019-12-06
16:32:19		 43.2027 11.0172 7 2019-12-06
16:39:28		 Sala Sismica INGV-Roma 74382731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-06 16:32:19 ± 0.16
Latitude 43.2077 ± 0.0054
Longitude 11.0322 ± 0.0136
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75726011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 777
Semi-minor axis of confidence ellipse (meter) 736
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.25900
Epicentral distance of station farthest from the epicenter (degree) 0.78241
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 74382731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-06 16:39:28

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 75726011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-27 16:03:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2019-12-06T16:32:44.30 0.6 undecidable manual S 29 79.7646 50 -0.21 44
IV.PII.HHZ. 2019-12-06T16:32:41.55 0.3 undecidable manual S 325 70.1742 50 -0.4 65
TV.SF04.EHZ. 2019-12-06T16:32:40.46 0.3 undecidable manual S 129 65.5899 50 -0.25 67
IV.CRMI.HNN. 2019-12-06T16:32:39.90 0.6 undecidable manual S 356 65.3901 50 -0.76 38
TV.SF01.EHZ. 2019-12-06T16:32:39.88 0.6 undecidable manual S 135 61.494 50 0.25 45
IV.ARCI.HHZ. 2019-12-06T16:32:36.96 0.6 undecidable manual S 138 53.4021 50 -0.5 43
IV.MAON.HHZ. 2019-12-06T16:32:35.83 0.3 undecidable manual P 175 86.8464 50 0.77 55
IV.CELB.HHZ. 2019-12-06T16:32:35.28 0.3 undecidable manual P 233 84.0492 50 0.66 58
IV.CASP.HHZ. 2019-12-06T16:32:34.60 0.6 undecidable manual S 196 48.2184 50 -1.48 28
IV.RUFI.EHZ. 2019-12-06T16:32:34.52 0.3 undecidable manual P 29 79.7646 50 0.55 61
IV.OSSC.HNE. 2019-12-06T16:32:32.75 0.6 undecidable manual S 26 39.0276 98 -0.51 44
IV.PII.HHZ. 2019-12-06T16:32:32.54 0.3 undecidable manual P 325 70.1742 50 0.05 69
IV.CRMI.HNN. 2019-12-06T16:32:32.03 0.1 undecidable manual P 356 65.3901 50 0.29 89
IV.CSNT.HHZ. 2019-12-06T16:32:31.81 0.3 undecidable manual S 35 36.0417 99 -0.42 68
TV.SF01.EHZ. 2019-12-06T16:32:31.62 0.1 undecidable manual P 135 61.494 50 0.47 86
TV.SF04.EHZ. 2019-12-06T16:32:31.91 0.1 undecidable manual P 129 65.5899 50 0.13 92
IV.ARCI.HHZ. 2019-12-06T16:32:29.98 0.1 undecidable manual P 138 53.4021 50 0.08 95
IV.CASP.HHZ. 2019-12-06T16:32:28.92 0.3 undecidable manual P 196 48.2184 50 -0.18 70
IV.RIBO.EHZ. 2019-12-06T16:32:28.94 0.3 undecidable manual S 178 28.749 101 -0.78 61
IV.OSSC.HNE. 2019-12-06T16:32:27.59 0.3 undecidable manual P 26 39.0276 98 0.12 72
IV.CSNT.HHZ. 2019-12-06T16:32:27.14 0.1 undecidable manual P 35 36.0417 99 0.26 94
IV.RIBO.EHZ. 2019-12-06T16:32:25.47 0.1 undecidable manual P 178 28.749 101 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:1.6 0.00017524625 0.1536 AML other m 2019-12-06T16:32:32.33
IV.CASP.HHN. ML:2.1 0.00034950000000000004 0.26 AML other m 2019-12-06T16:32:34.99
IV.CSNT.HHE. ML:1.6 0.00015403830000000003 0.32 AML other m 2019-12-06T16:32:35.14
IV.ARCI.HHN. ML:1.8 0.00014737935 0.1408 AML other m 2019-12-06T16:32:37.61
IV.ARCI.HHE. ML:1.8 0.00014722155 0.1408 AML other m 2019-12-06T16:32:37.77
IV.CASP.HHE. ML:2.3 0.0006205000000000001 0.36 AML other m 2019-12-06T16:32:39.22
TV.SF01.EHE. ML:2.0 0.0002275 0.24 AML other m 2019-12-06T16:32:40.06
TV.SF01.EHN. ML:2.0 0.00021812870000000002 0.256 AML other m 2019-12-06T16:32:40.06
TV.SF04.EHN. ML:1.9 0.0001415356 0.3328 AML other m 2019-12-06T16:32:40.59
TV.SF04.EHE. ML:2.0 0.00020409159999999998 0.2176 AML other m 2019-12-06T16:32:41.75
IV.RUFI.EHN. ML:1.4 0.0000371978185 0.256 AML other m 2019-12-06T16:32:45.72
IV.RUFI.EHE. ML:1.5 0.000044921015 0.4608 AML other m 2019-12-06T16:32:46.99
IV.MAON.HHE. ML:2.2 0.000187 0.14 AML other m 2019-12-06T16:32:47.29
IV.MAON.HHN. ML:2.1 0.00015900000000000002 0.84 AML other m 2019-12-06T16:32:47.67
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
Waveforms Seismic signals in miniseed + resp format Download