Earthquake with magnitude of ML 1.4 on date 01-12-2019 and time 01:03:02 (Italy) in region 4 km SW Radicofani (SI)

A magnitude ML 1.4 earthquake occured in region: 4 km SW Radicofani (SI), on

  • 01-12-2019 00:03:02 (UTC)
  • 01-12-2019 01:03:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.88, 11.74 at 11 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Radicofani SI 4 1097 1097
Piancastagnaio SI 5 4230 5327
Abbadia San Salvatore SI 5 6444 11771
San Casciano dei Bagni SI 11 1632 13403
Castell'Azzara GR 12 1476 14879
Santa Fiora GR 13 2622 17501
Proceno VT 15 557 18058
Seggiano GR 16 961 19019
Arcidosso GR 16 4285 23304
Castel del Piano GR 16 4690 27994
Cetona SI 17 2755 30749
Sarteano SI 17 4717 35466
Castiglione d'Orcia SI 17 2346 37812
Acquapendente VT 18 5506 43318

Municipalities with at least 50000 inhabitants

An earthquake occurred to
52 Km E of Grosseto (82087 inhabitants)
59 Km W of Perugia (166134 inhabitants)
59 Km NW of Viterbo (67173 inhabitants)
59 Km SE of Siena (53903 inhabitants)
67 Km S of Arezzo (99543 inhabitants)
79 Km W of Foligno (57155 inhabitants)
82 Km W of Terni (111501 inhabitants)
87 Km N of Civitavecchia (52991 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.4 2019-12-01
00:03:02
42.88 11.74 11 2019-12-01
00:10:20
Sala Sismica INGV-Roma 74203091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-01 00:03:02 ± 0.11
Latitude 42.88 ± 0.01
Longitude 11.74 ± 0.00
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 74203091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1130
Semi-minor axis of confidence ellipse (meter) 381
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 174
Circular confidence region, given by single value of horizontal uncertainty (meter) 1130
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.06835
Epicentral distance of station farthest from the epicenter (degree) 0.2662
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 14
Type of magnitude ML
Reference to an origin 74203091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-01 00:10:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARCI.HHZ. 2019-12-01T00:03:10.74 0.3 undecidable manual S 263 0.1925 50 -0.13 72
TV.SF01.EHZ. 2019-12-01T00:03:09.20 0.3 undecidable manual S 244 0.1421 124 -0.05 74
IV.SACS.HHZ. 2019-12-01T00:03:09.15 0.3 undecidable manual S 102 0.1295 127 0.29 71
IV.LATE.HHZ. 2019-12-01T00:03:08.60 0.3 undecidable manual P 169 0.2662 50 -0.04 72
IV.MCIV.CHZ. 2019-12-01T00:03:08.22 0.6 undecidable manual S 205 0.1061 132 0.05 50
TV.SF03.EHE. 2019-12-01T00:03:07.57 0.3 undecidable manual S 207 0.0818 140 0.06 75
TV.SF04.EHZ. 2019-12-01T00:03:07.08 0.6 undecidable manual S 235 0.0683 145 -0.12 49
IV.ARCI.HHZ. 2019-12-01T00:03:07.60 0.1 positive manual P 263 0.1925 50 0.21 95
TV.SF01.EHZ. 2019-12-01T00:03:06.65 0.1 positive manual P 244 0.1421 124 0.2 96
IV.SACS.HHZ. 2019-12-01T00:03:05.81 0.3 undecidable manual P 102 0.1295 127 -0.42 69
IV.MCIV.CHZ. 2019-12-01T00:03:05.78 0.1 positive manual P 205 0.1061 132 -0.05 100
TV.SF03.EHE. 2019-12-01T00:03:05.40 0.1 undecidable manual P 207 0.0818 140 -0.05 100
TV.SF04.EHZ. 2019-12-01T00:03:05.20 0.1 undecidable manual P 235 0.0683 145 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHE. ML:2 0.00141419465 0.1 AML other m 2019-12-01T00:03:07.36
TV.SF04.EHN. ML:2.2 0.002196551 0.1 AML other m 2019-12-01T00:03:07.32
IV.MCIV.CHE. ML:1.6 0.0003987119 0.336 AML other m 2019-12-01T00:03:08.42
IV.MCIV.CHN. ML:1.7 0.00054284645 0.176 AML other m 2019-12-01T00:03:08.56
IV.SACS.HNE. ML:1.4 0.0002722007 0.37 AML other m 2019-12-01T00:03:12.90
IV.SACS.HNN. ML:1.4 0.000215158405 0.53 AML other m 2019-12-01T00:03:12.85
IV.SACS.HHE. ML:1.4 0.0002130334 0.4 AML other m 2019-12-01T00:03:12.90
IV.SACS.HHN. ML:1.3 0.0001942883 0.22 AML other m 2019-12-01T00:03:09.87
TV.SF01.EHE. ML:1.5 0.00030993 0.32 AML other m 2019-12-01T00:03:09.74
TV.SF01.EHN. ML:1.6 0.0003509461 0.32 AML other m 2019-12-01T00:03:10.68
IV.ARCI.HNE. ML:1.2 0.00012226625 0.26 AML other m 2019-12-01T00:03:12.42
IV.ARCI.HNN. ML:1.3 0.00015056647 0.26 AML other m 2019-12-01T00:03:11.00
IV.ARCI.HHE. ML:1.2 0.0001201155 0.3 AML other m 2019-12-01T00:03:12.14
IV.ARCI.HHN. ML:1.3 0.0001484341 0.3 AML other m 2019-12-01T00:03:10.92
IV.LATE.HHE. ML:1.2 8.398923E-5 0.14 AML other m 2019-12-01T00:03:16.34
IV.LATE.HHN. ML:1.4 0.00012903203 0.28 AML other m 2019-12-01T00:03:17.02
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download