Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 17-10-2019 and time 20:10:52 (Italy) in region 3 km NE Piancastagnaio (SI)

A magnitude ML 0.7 earthquake occured in region: 3 km NE Piancastagnaio (SI), on

  • 17-10-2019 18:10:52 (UTC)
  • 17-10-2019 20:10:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8650, 11.7180 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.

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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
Piancastagnaio SI 3 4230 4230
Abbadia San Salvatore SI 4 6444 10674
Radicofani SI 5 1097 11771
Castell'Azzara GR 10 1476 13247
Santa Fiora GR 11 2622 15869
San Casciano dei Bagni SI 13 1632 17501
Arcidosso GR 15 4285 21786
Seggiano GR 15 961 22747
Castel del Piano GR 15 4690 27437
Proceno VT 15 557 27994
Castiglione d'Orcia SI 18 2346 30340
Acquapendente VT 18 5506 35846
Cetona SI 19 2755 38601
Sarteano SI 19 4717 43318
Roccalbegna GR 19 1044 44362

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km E of Grosseto (82087 inhabitants)
59 Km NW of Viterbo (67173 inhabitants)
59 Km SE of Siena (53903 inhabitants)
61 Km W of Perugia (166134 inhabitants)
68 Km S of Arezzo (99543 inhabitants)
81 Km W of Foligno (57155 inhabitants)
83 Km W of Terni (111501 inhabitants)
86 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
Reviewed
Rev100 		ML 0.7 2019-10-17
18:10:52		 42.8652 11.7182 5 2019-10-18
12:29:02		 Sala Sismica INGV-Roma 73323081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-17 18:10:52 ± 0.21
Latitude 42.8652 ± 0.0072
Longitude 11.7182 ± 0.0098
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73323081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 855
Semi-minor axis of confidence ellipse (meter) 398
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 18
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 179
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25900
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:0.7

Field Value
Value 0.7
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 73323081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-18 12:29:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FIR.HHZ. 2019-10-17T18:11:05.53 3.0 undecidable manual P 0.17 0
IV.LATE.HHN. 2019-10-17T18:11:01.81 1.0 undecidable manual S 166 28.749 100 -0.37 23
IV.ARCI.HHZ. 2019-10-17T18:10:58.86 0.3 undecidable manual S 266 19.7691 105 -0.28 72
IV.LATE.HHN. 2019-10-17T18:10:57.71 0.1 undecidable manual P 166 28.749 100 -0.18 97
IV.ARCI.HHZ. 2019-10-17T18:10:56.28 0.1 undecidable manual P 266 19.7691 105 0.14 99
TV.SF14.HHZ. 2019-10-17T18:10:56.83 0.3 undecidable manual S 215 14.874 110 -0.67 65
IV.MCIV.CHZ. 2019-10-17T18:10:56.03 0.3 undecidable manual S 199 10.1787 117 0.02 78
IV.SACS.HHZ. 2019-10-17T18:10:55.21 0.3 undecidable manual P 96 15.6732 109 -0.13 75
TV.SF13.HHN. 2019-10-17T18:10:55.87 0.3 undecidable manual S 237 9.5793 119 0.05 77
TV.SF04.EHZ. 2019-10-17T18:10:55.04 0.3 undecidable manual S 235 5.6943 133 0.3 74
TV.SF03.EHE. 2019-10-17T18:10:55.27 0.3 undecidable manual S 201 7.3815 126 0.08 77
TV.SF13.HHN. 2019-10-17T18:10:54.47 0.1 undecidable manual P 237 9.5793 119 0.25 99
TV.SF04.EHZ. 2019-10-17T18:10:54.07 0.1 undecidable manual P 235 5.6943 133 0.48 95
TV.SF03.EHE. 2019-10-17T18:10:54.22 0.1 undecidable manual P 201 7.3815 126 0.36 97
IV.MCIV.CHZ. 2019-10-17T18:10:54.57 0.1 undecidable manual P 199 10.1787 117 0.24 99
TV.SF14.HHZ. 2019-10-17T18:10:54.94 0.1 positive manual P 215 14.874 110 -0.25 98
TV.SF11.HHZ. 2019-10-17T18:10:53.79 0.3 undecidable manual S 277 3.1968 149 -0.39 72
TV.SF11.HHZ. 2019-10-17T18:10:53.04 0.1 undecidable manual P 277 3.1968 149 -0.23 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCIV.CHE. ML:1.0 0.0001575 0.2 AML other m 2019-10-17T18:10:57.54
IV.MCIV.CHN. ML:1.1 0.0001985 0.14 AML other m 2019-10-17T18:10:56.41
IV.ARCI.HHE. ML:0.3 0.000013798265 0.1408 AML other m 2019-10-17T18:11:00.73
IV.ARCI.HHN. ML:0.3 0.00001650618 0.2816 AML other m 2019-10-17T18:11:00.38
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