Earthquake with magnitude of Md 0.5 on date 17-02-2020 and time 02:22:20 (Italy) in region 2 km E Piancastagnaio (SI)

A magnitude Md 0.5 earthquake occured in region: 2 km E Piancastagnaio (SI), on

  • 17-02-2020 01:22:20 (UTC)
  • 17-02-2020 02:22:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.85, 11.71 at 5 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 2 4230 4230
Abbadia San Salvatore SI 5 6444 10674
Radicofani SI 7 1097 11771
Castell'Azzara GR 8 1476 13247
Santa Fiora GR 10 2622 15869
San Casciano dei Bagni SI 14 1632 17501
Proceno VT 14 557 18058
Arcidosso GR 14 4285 22343
Castel del Piano GR 15 4690 27033
Seggiano GR 16 961 27994
Acquapendente VT 17 5506 33500
Roccalbegna GR 18 1044 34544
Sorano GR 18 3428 37972
Semproniano GR 19 1059 39031
Onano VT 19 995 40026
Castiglione d'Orcia SI 19 2346 42372

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km E of Grosseto (82087 inhabitants)
58 Km NW of Viterbo (67173 inhabitants)
61 Km SE of Siena (53903 inhabitants)
62 Km W of Perugia (166134 inhabitants)
71 Km S of Arezzo (99543 inhabitants)
82 Km W of Foligno (57155 inhabitants)
83 Km W of Terni (111501 inhabitants)
84 Km N of Civitavecchia (52991 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
Rev 100 Md 0.5 2020-02-17
01:22:20
42.85 11.71 5 2020-02-17
13:42:07
Sala Sismica INGV-Roma 76598281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-17 01:22:20 ± 0.07
Latitude 42.85 ± 0.00
Longitude 11.71 ± 0.00
Depth (km) 5 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76598281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 250
Semi-minor axis of confidence ellipse (meter) 57
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.03238
Epicentral distance of station farthest from the epicenter (degree) 0.17267
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

Md:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 7
Type of magnitude Md
Reference to an origin 76598281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-17 13:42:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARCI.HHZ. 2020-02-17T01:22:26.98 0.3 undecidable manual S 272 0.1727 104 -0.07 72
TV.SF14.HHE. 2020-02-17T01:22:24.74 0.3 undecidable manual S 218 0.1151 111 -0.2 71
IV.ARCI.HHZ. 2020-02-17T01:22:24.36 0.1 undecidable manual P 272 0.1727 104 0.21 94
TV.SF01.EHZ. 2020-02-17T01:22:24.74 0.3 undecidable manual S 252 0.1133 111 -0.14 72
TV.SF13.HHE. 2020-02-17T01:22:23.50 0.3 undecidable manual S 247 0.0728 121 0.05 74
IV.SACS.HHZ. 2020-02-17T01:22:23.49 0.1 undecidable manual P 89 0.1457 107 -0.08 97
IV.MCIV.CHZ. 2020-02-17T01:22:23.51 0.3 undecidable manual S 201 0.0719 121 0.07 74
IV.MCIV.CHZ. 2020-02-17T01:22:22.07 0.1 undecidable manual P 201 0.0719 121 0 100
TV.SF01.EHZ. 2020-02-17T01:22:22.90 0.1 undecidable manual P 252 0.1133 111 0 99
TV.SF04.EHZ. 2020-02-17T01:22:22.44 0.3 undecidable manual S 254 0.0387 138 0.01 75
TV.SF14.HHE. 2020-02-17T01:22:22.83 0.1 undecidable manual P 218 0.1151 111 -0.1 97
TV.SF11.HHE. 2020-02-17T01:22:22.19 0.3 undecidable manual S 314 0.0324 143 -0.09 74
TV.SF13.HHE. 2020-02-17T01:22:22.15 0.1 undecidable manual P 247 0.0728 121 0.08 98
TV.SF03.EHN. 2020-02-17T01:22:22.74 0.3 undecidable manual S 203 0.0477 133 0.07 74
TV.SF03.EHN. 2020-02-17T01:22:21.70 0.1 undecidable manual P 203 0.0477 133 0.08 99
TV.SF04.EHZ. 2020-02-17T01:22:21.54 0.1 undecidable manual P 254 0.0387 138 0.06 99
TV.SF11.HHE. 2020-02-17T01:22:21.38 0.1 undecidable manual P 314 0.0324 143 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHZ. Md:0.6 5 END duration s
IV.MCIV.CHZ. Md:0.5 4 END duration s
TV.SF01.EHZ. Md:0.7 5 END duration s
TV.SF14.HHE. Md:0.5 4 END duration s
TV.SF13.HHE. Md:0.6 5 END duration s
TV.SF11.HHE. Md:0.4 4 END duration s
TV.SF03.EHN. Md:0.4 4 END duration s
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