Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 24-09-2019 and time 21:43:01 (Italy) in region 2 km S Abbadia San Salvatore (SI)

A magnitude ML 0.9 earthquake occured in region: 2 km S Abbadia San Salvatore (SI), on

  • 24-09-2019 19:43:01 (UTC)
  • 24-09-2019 21:43:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8680, 11.6790 at 4 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.

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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
Abbadia San Salvatore SI 2 6444 6444
Piancastagnaio SI 2 4230 10674
Radicofani SI 8 1097 11771
Santa Fiora GR 9 2622 14393
Castell'Azzara GR 11 1476 15869
Arcidosso GR 11 4285 20154
Castel del Piano GR 12 4690 24844
Seggiano GR 12 961 25805
Castiglione d'Orcia SI 16 2346 28151
San Casciano dei Bagni SI 16 1632 29783
Roccalbegna GR 17 1044 30827
Proceno VT 17 557 31384
Semproniano GR 19 1059 32443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km E of Grosseto (82087 inhabitants)
58 Km SE of Siena (53903 inhabitants)
61 Km NW of Viterbo (67173 inhabitants)
64 Km W of Perugia (166134 inhabitants)
69 Km S of Arezzo (99543 inhabitants)
84 Km W of Foligno (57155 inhabitants)
86 Km W of Terni (111501 inhabitants)
87 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
Bulletin
Rev1000 		ML 0.9 2019-09-24
19:43:01		 42.8677 11.6788 4 2020-02-28
16:42:20		 Bollettino Sismico Italiano INGV 75832061
Reviewed
Rev100 		ML 0.9 2019-09-24
19:43:02		 42.8677 11.6602 4 2019-09-24
20:38:30		 Sala Sismica INGV-Roma 72733181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-24 19:43:01 ± 0.18
Latitude 42.8677 ± 0.0072
Longitude 11.6788 ± 0.0074
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75832061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 767
Semi-minor axis of confidence ellipse (meter) 169
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 162
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32016
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 75832061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-25 09:51:09

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 72733181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-24 20:38:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SPS2.HHZ. 2019-09-24T19:44:15.41 3.0 positive manual Pg 20.82 0
IV.CMPR.HHZ. 2019-09-24T19:43:46.16 3.0 positive manual Pg 9.44 0
IV.DGI.HHZ. 2019-09-24T19:43:24.28 3.0 undecidable manual Pn 1.25 0
OX.FUSE.HHZ. 2019-09-24T19:43:18.77 3.0 undecidable manual Pg 10.4 0
IV.MGAB.HHZ. 2019-09-24T19:43:13.56 0.6 undecidable manual S 82 35.5422 97 -0.81 39
IV.LATE.HHN. 2019-09-24T19:43:11.50 0.6 undecidable manual S 160 29.9478 98 -0.95 37
IV.SACS.HHZ. 2019-09-24T19:43:09.20 0.6 undecidable manual S 96 18.87 102 0.55 45
IV.LATE.HHN. 2019-09-24T19:43:08.16 0.3 undecidable manual P 160 29.9478 98 0.14 72
IV.MGAB.HHZ. 2019-09-24T19:43:08.91 0.3 undecidable manual P 82 35.5422 97 -0.22 70
IV.ARCI.HHZ. 2019-09-24T19:43:07.70 0.3 undecidable manual S 264 16.6722 104 -0.19 73
MN.TRI.HHZ. 2019-09-24T19:43:07.23 3.0 positive manual Pn 1.72 0
IV.SACS.HHZ. 2019-09-24T19:43:06.34 0.3 undecidable manual P 96 18.87 102 0.52 68
IV.RMP.HHZ. 2019-09-24T19:43:06.04 3.0 undecidable manual Pn 1.52 0
TV.SF14.HHE. 2019-09-24T19:43:06.30 0.3 undecidable manual S 203 13.5753 107 -0.56 67
IV.MCIV.CHZ. 2019-09-24T19:43:05.80 0.3 undecidable manual S 181 9.879 112 0.13 75
IV.ARCI.HHZ. 2019-09-24T19:43:05.53 0.1 undecidable manual P 264 16.6722 104 0.15 98
TV.SF13.HHE. 2019-09-24T19:43:05.00 0.3 undecidable manual S 221 7.2927 119 0.14 75
TV.SF14.HHE. 2019-09-24T19:43:04.44 0.1 undecidable manual P 203 13.5753 107 -0.35 95
TV.SF04.EHZ. 2019-09-24T19:43:04.10 0.3 undecidable manual S 203 3.8961 137 0.2 74
IV.MCIV.CHZ. 2019-09-24T19:43:04.21 0.1 undecidable manual P 181 9.879 112 0.11 100
TV.SF03.EHE. 2019-09-24T19:43:04.90 0.3 undecidable manual S 176 7.1928 119 0.06 76
TV.SF13.HHE. 2019-09-24T19:43:03.80 0.1 undecidable manual P 221 7.2927 119 0.17 99
TV.SF04.EHZ. 2019-09-24T19:43:03.43 0.1 undecidable manual P 203 3.8961 137 0.35 96
TV.SF11.HHE. 2019-09-24T19:43:03.10 0.3 undecidable manual S 4 0.0999 179 -0.27 74
TV.SF03.EHE. 2019-09-24T19:43:03.83 0.1 undecidable manual P 176 7.1928 119 0.21 98
TV.SF11.HHE. 2019-09-24T19:43:02.52 0.1 undecidable manual P 4 0.0999 179 -0.25 99
IV.PE3.EHZ. 2019-09-24T19:42:57.61 3.0 undecidable manual S -1.78 0
IV.APEC.HHZ. 2019-09-24T19:42:41.42 3.0 undecidable manual P -3.54 0
GU.CARD.HHZ. 2019-09-24T19:42:35.08 3.0 undecidable manual P -1.24 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APEC.HHE. ML:1.5 0.00003104935 0.2048 AML other m 2019-09-24T19:42:53.03
IV.APEC.HHN. ML:1.4 0.000024258090000000003 0.2048 AML other m 2019-09-24T19:42:59.09
TV.SF01.EHN. ML:1.1 0.0001965354 0.2048 AML other m 2019-09-24T19:43:05.08
IV.MCIV.CHE. ML:1.0 0.00018339185000000003 0.1664 AML other m 2019-09-24T19:43:06.44
IV.MCIV.CHN. ML:1.0 0.0001607545 0.128 AML other m 2019-09-24T19:43:06.78
TV.SF01.EHE. ML:1.1 0.00018951865000000002 0.4224 AML other m 2019-09-24T19:43:06.85
IV.ARCI.HHN. ML:0.6 0.00003925988499999999 0.1408 AML other m 2019-09-24T19:43:08.92
IV.ARCI.HHE. ML:0.6 0.000045190135 1.808 AML other m 2019-09-24T19:43:08.04
IV.SACS.HHN. ML:0.4 0.00002138682 1.872 AML other m 2019-09-24T19:43:09.95
IV.SACS.HHE. ML:0.4 0.000023289335 0.256 AML other m 2019-09-24T19:43:10.55
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