Earthquake with magnitude of ML 1.5 on date 21-01-2020 and time 21:38:24 (Italy) in region 1 km SW Piancastagnaio (SI)

A magnitude ML 1.5 earthquake occured in region: 1 km SW Piancastagnaio (SI), on

  • 21-01-2020 20:38:24 (UTC)
  • 21-01-2020 21:38:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.84, 11.68 at 7 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.

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 1 4230 4230
Abbadia San Salvatore SI 5 6444 10674
Castell'Azzara GR 8 1476 12150
Santa Fiora GR 8 2622 14772
Radicofani SI 9 1097 15869
Arcidosso GR 12 4285 20154
Castel del Piano GR 13 4690 24844
Seggiano GR 14 961 25805
Proceno VT 15 557 26362
Roccalbegna GR 16 1044 27406
San Casciano dei Bagni SI 16 1632 29038
Semproniano GR 17 1059 30097
Sorano GR 18 3428 33525
Acquapendente VT 18 5506 39031
Castiglione d'Orcia SI 19 2346 41377
Onano VT 20 995 42372

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km E of Grosseto (82087 inhabitants)
58 Km NW of Viterbo (67173 inhabitants)
60 Km SE of Siena (53903 inhabitants)
64 Km W of Perugia (166134 inhabitants)
71 Km S of Arezzo (99543 inhabitants)
84 Km N of Civitavecchia (52991 inhabitants)
84 Km W of Foligno (57155 inhabitants)
85 Km W of Terni (111501 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 1.5 2020-01-21
20:38:24
42.84 11.69 7 2020-07-18
21:08:19
Bollettino Sismico Italiano INGV 76198031
Reviewed
Rev100
ML 1.5 2020-01-21
20:38:24
42.87 11.69 2 2020-01-21
20:56:49
Sala Sismica INGV-Roma 75706701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-21 20:38:24 ± 0.12
Latitude 42.84 ± 0.01
Longitude 11.69 ± 0.01
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76198031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1111
Semi-minor axis of confidence ellipse (meter) 767
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 179
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.69338
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 76198031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-06 13:08:33

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 75706701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-21 20:56:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LAV9.HHZ. 2020-01-21T20:38:47.11 3.0 positive manual P 0.05 0
IV.FDMO.HHZ. 2020-01-21T20:38:41.48 3.0 undecidable manual P -0.09 0
IV.CSNT.HHZ. 2020-01-21T20:38:37.62 0.1 undecidable manual P 336 0.6934 50 -0.42 82
IV.TRIF.CHZ. 2020-01-21T20:38:37.47 0.3 undecidable manual P 296 0.634 50 0.45 62
IV.FROS.CHE. 2020-01-21T20:38:35.21 0.3 undecidable manual P 314 0.5333 50 -0.09 69
IV.MGAB.HHZ. 2020-01-21T20:38:31.04 0.3 undecidable manual P 77 0.3211 101 -0.47 66
IV.LATE.HHN. 2020-01-21T20:38:30.14 0.3 undecidable manual P 159 0.2446 105 0.28 70
TV.SF14.HHZ. 2020-01-21T20:38:28.29 0.6 undecidable manual S 211 0.1007 122 -0.55 45
IV.SACS.HHZ. 2020-01-21T20:38:28.43 0.1 undecidable manual P 87 0.1646 111 0.26 95
TV.SF01.EHZ. 2020-01-21T20:38:28.73 0.3 undecidable manual S 251 0.0944 124 0.11 74
TV.SF01.EHZ. 2020-01-21T20:38:27.12 0.1 undecidable manual P 251 0.0944 124 0.35 94
IV.MCIV.CHZ. 2020-01-21T20:38:27.58 0.3 undecidable manual S 186 0.0639 135 -0.13 75
TV.SF03.EHZ. 2020-01-21T20:38:27.12 0.6 undecidable manual S 179 0.0396 148 0 51
TV.SF03.EHZ. 2020-01-21T20:38:26.12 0.1 undecidable manual P 179 0.0396 148 0.21 98
IV.MCIV.CHZ. 2020-01-21T20:38:26.41 0.1 undecidable manual P 186 0.0639 135 0.16 99
TV.SF04.EHZ. 2020-01-21T20:38:26.45 0.6 undecidable manual S 251 0.0189 163 -0.35 48
TV.SF14.HHZ. 2020-01-21T20:38:26.40 0.1 undecidable manual P 211 0.1007 122 -0.5 91
TV.SF04.EHZ. 2020-01-21T20:38:25.86 0.1 undecidable manual P 251 0.0189 163 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:0 0.0214 0.1 AML other m 2020-01-21T20:38:26.58
TV.SF04.EHE. ML:0 0.0118 0.08 AML other m 2020-01-21T20:38:26.66
IV.MCIV.CHN. ML:1.6 0.0007747518 0.1152 AML other m 2020-01-21T20:38:28.22
TV.SF01.EHN. ML:1.5 0.0005395 0.2 AML other m 2020-01-21T20:38:28.83
TV.SF01.EHE. ML:1.6 0.0005489717 0.1792 AML other m 2020-01-21T20:38:28.96
IV.MCIV.CHE. ML:1.5 0.0005757513 0.256 AML other m 2020-01-21T20:38:29.29
IV.LATE.HHN. ML:1.4 0.000123303655 0.4768 AML other m 2020-01-21T20:38:33.86
IV.LATE.HHE. ML:1.2 0.000101829725 0.2816 AML other m 2020-01-21T20:38:34.82
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