Earthquake with magnitude of ML 1.2 on date 17-02-2020 and time 00:19:07 (Italy) in region 4 km E Piancastagnaio (SI)

A magnitude ML 1.2 earthquake occured in region: 4 km E Piancastagnaio (SI), on

  • 16-02-2020 23:19:07 (UTC)
  • 17-02-2020 00:19:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.85, 11.74 at 8 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
Piancastagnaio SI 4 4230 4230
Radicofani SI 6 1097 5327
Abbadia San Salvatore SI 6 6444 11771
Castell'Azzara GR 9 1476 13247
San Casciano dei Bagni SI 11 1632 14879
Proceno VT 13 557 15436
Santa Fiora GR 13 2622 18058
Acquapendente VT 16 5506 23564
Arcidosso GR 17 4285 27849
Castel del Piano GR 17 4690 32539
Seggiano GR 17 961 33500
Cetona SI 18 2755 36255
Onano VT 18 995 37250
Sarteano SI 19 4717 41967
Sorano GR 19 3428 45395
Allerona TR 19 1794 47189
Castiglione d'Orcia SI 20 2346 49535

Municipalities with at least 50000 inhabitants

An earthquake occurred to
52 Km E of Grosseto (82087 inhabitants)
57 Km NW of Viterbo (67173 inhabitants)
60 Km W of Perugia (166134 inhabitants)
62 Km SE of Siena (53903 inhabitants)
70 Km S of Arezzo (99543 inhabitants)
79 Km W of Foligno (57155 inhabitants)
81 Km W of Terni (111501 inhabitants)
84 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 1.2 2020-02-16
23:19:07
42.85 11.74 8 2020-02-16
23:27:13
Sala Sismica INGV-Roma 76579911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-16 23:19:07 ± 0.17
Latitude 42.85 ± 0.01
Longitude 11.74 ± 0.00
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76579911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 729
Semi-minor axis of confidence ellipse (meter) 202
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 349
Circular confidence region, given by single value of horizontal uncertainty (meter) 730
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 160
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.27789
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 76579911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-16 23:27:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARCI.HHZ. 2020-02-16T23:19:14.90 0.3 undecidable manual S 270 0.1952 110 -0.23 70
TV.SF01.EHZ. 2020-02-16T23:19:13.17 0.1 undecidable manual S 254 0.1367 117 0.12 96
IV.SACS.HHZ. 2020-02-16T23:19:13.17 0.3 undecidable manual S 91 0.1232 120 0.6 64
IV.MGAB.HHZ. 2020-02-16T23:19:12.41 3.0 undecidable manual P 0.2779 -1.1 0
TV.SF14.HHE. 2020-02-16T23:19:12.93 0.1 undecidable manual S 224 0.134 118 -0.02 98
TV.SF13.HHE. 2020-02-16T23:19:11.75 0.1 undecidable manual S 250 0.0953 126 0.06 98
IV.MCIV.CHZ. 2020-02-16T23:19:11.22 0.3 undecidable manual S 214 0.0863 129 -0.21 72
IV.ARCI.HHZ. 2020-02-16T23:19:11.89 0.1 undecidable manual P 270 0.1952 110 0.14 95
TV.SF03.EHN. 2020-02-16T23:19:10.78 0.1 undecidable manual S 221 0.0639 138 0.01 100
TV.SF14.HHE. 2020-02-16T23:19:10.43 0.1 undecidable manual P 224 0.134 118 -0.06 97
TV.SF04.EHZ. 2020-02-16T23:19:10.73 0.1 undecidable manual S 256 0.0621 139 0 100
TV.SF01.EHZ. 2020-02-16T23:19:10.73 0.1 undecidable manual P 254 0.1367 117 0.18 95
TV.SF11.HHE. 2020-02-16T23:19:10.28 0.3 undecidable manual S 291 0.0495 145 -0.15 73
IV.MCIV.CHZ. 2020-02-16T23:19:09.60 0.1 positive manual P 214 0.0863 129 -0.01 99
IV.SACS.HHZ. 2020-02-16T23:19:09.65 0.1 undecidable manual P 91 0.1232 120 -0.63 85
TV.SF03.EHN. 2020-02-16T23:19:09.25 0.1 undecidable manual P 221 0.0639 138 0.02 100
TV.SF13.HHE. 2020-02-16T23:19:09.88 0.1 undecidable manual P 250 0.0953 126 0.12 97
TV.SF04.EHZ. 2020-02-16T23:19:09.22 0.1 undecidable manual P 256 0.0621 139 0.01 100
TV.SF11.HHE. 2020-02-16T23:19:09.02 0.3 undecidable manual P 291 0.0495 145 -0.01 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:1.4 0.0004915 0.3 AML other m 2020-02-16T23:19:11.17
TV.SF04.EHE. ML:1.4 0.0004495 0.22 AML other m 2020-02-16T23:19:11.33
IV.MCIV.CHE. ML:1.3 0.000274 0.14 AML other m 2020-02-16T23:19:11.90
IV.MCIV.CHN. ML:1.4 0.0003965 0.86 AML other m 2020-02-16T23:19:12.92
IV.SACS.HHE. ML:1.2 0.0001645 0.26 AML other m 2020-02-16T23:19:13.58
IV.SACS.HHN. ML:1 0.0001036 1.28 AML other m 2020-02-16T23:19:13.70
IV.MGAB.HHE. ML:0.9 3.435E-5 0.84 AML other m 2020-02-16T23:19:18.37
IV.MGAB.HHN. ML:0.9 4.23E-5 1.18 AML other m 2020-02-16T23:19:20.38
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