Earthquake with magnitude of ML 0.9 on date 24-09-2019 and time 21:43:02 (Italy) in region 2 km SW Abbadia San Salvatore (SI)

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

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

and geographic coordinates (lat, lon) 42.87, 11.66 at 4 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
Abbadia San Salvatore SI 2 6444 6444
Piancastagnaio SI 3 4230 10674
Santa Fiora GR 7 2622 13296
Radicofani SI 9 1097 14393
Arcidosso GR 10 4285 18678
Castel del Piano GR 10 4690 23368
Seggiano GR 11 961 24329
Castell'Azzara GR 11 1476 25805
Roccalbegna GR 15 1044 26849
Castiglione d'Orcia SI 16 2346 29195
San Casciano dei Bagni SI 18 1632 30827
Semproniano GR 18 1059 31886
Proceno VT 19 557 32443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km E of Grosseto (82087 inhabitants)
57 Km SE of Siena (53903 inhabitants)
62 Km NW of Viterbo (67173 inhabitants)
65 Km W of Perugia (166134 inhabitants)
69 Km S of Arezzo (99543 inhabitants)
86 Km W of Foligno (57155 inhabitants)
87 Km N of Civitavecchia (52991 inhabitants)
88 Km W of Terni (111501 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 0.9 2019-09-24
19:43:02
42.87 11.66 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 19:43:02 ± 0.22
Latitude 42.87 ± 0.01
Longitude 11.66 ± 0.01
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72733181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 849
Semi-minor axis of confidence ellipse (meter) 161
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) 850
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 183
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.18346
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 9
Magnitude information

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 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.SACS.HHZ. 2019-09-24T19:43:09.26 0.6 undecidable manual S 96 0.1835 100 0 49
IV.ARCI.HHZ. 2019-09-24T19:43:07.73 0.3 undecidable manual S 263 0.1367 103 0.26 71
MN.TRI.HHZ. 2019-09-24T19:43:07.23 3.0 positive manual Pn 1.72 0
TV.SF14.HHE. 2019-09-24T19:43:06.39 0.3 undecidable manual S 197 0.1169 105 -0.36 69
IV.SACS.HHZ. 2019-09-24T19:43:06.34 0.3 undecidable manual P 96 0.1835 100 0.12 72
IV.RMP.HHZ. 2019-09-24T19:43:06.04 3.0 undecidable manual Pn 1.52 0
TV.SF13.HHE. 2019-09-24T19:43:05.02 0.3 undecidable manual S 211 0.0576 118 0.43 69
IV.MCIV.CHZ. 2019-09-24T19:43:05.83 0.3 undecidable manual S 172 0.0899 109 0.09 74
IV.ARCI.HHZ. 2019-09-24T19:43:05.53 0.1 undecidable manual P 263 0.1367 103 0.34 93
TV.SF01.EHZ. 2019-09-24T19:43:04.97 0.3 undecidable manual S 232 0.0899 109 -0.79 60
TV.SF03.EHE. 2019-09-24T19:43:04.91 0.3 undecidable manual S 164 0.0674 115 -0.03 75
TV.SF14.HHE. 2019-09-24T19:43:04.44 0.1 undecidable manual P 197 0.1169 105 -0.34 93
IV.MCIV.CHZ. 2019-09-24T19:43:04.21 0.1 undecidable manual P 172 0.0899 109 0.02 100
TV.SF04.EHZ. 2019-09-24T19:43:04.17 0.3 undecidable manual S 180 0.0324 134 0.38 70
TV.SF04.EHZ. 2019-09-24T19:43:03.43 0.1 undecidable manual P 180 0.0324 134 0.36 94
TV.SF13.HHE. 2019-09-24T19:43:03.80 0.1 undecidable manual P 211 0.0576 118 0.26 96
TV.SF01.EHZ. 2019-09-24T19:43:03.32 0.6 undecidable manual P 232 0.0899 109 -0.88 39
TV.SF11.HHE. 2019-09-24T19:43:03.16 0.3 undecidable manual S 86 0.0135 156 -0.23 73
TV.SF03.EHE. 2019-09-24T19:43:03.83 0.1 undecidable manual P 164 0.0674 115 0.1 99
TV.SF11.HHE. 2019-09-24T19:43:02.52 0.1 undecidable manual P 86 0.0135 156 -0.31 95
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
TV.SF01.EHN. ML:0 0.0001965354 0.2048 AML other m 2019-09-24T19:43:05.08
TV.SF01.EHE. ML:0 0.00018951865 0.4224 AML other m 2019-09-24T19:43:06.85
IV.APEC.HHE. ML:1.5 3.104935E-5 0.2048 AML other m 2019-09-24T19:42:53.03
IV.APEC.HHN. ML:1.4 2.425809E-5 0.2048 AML other m 2019-09-24T19:42:59.09
TV.SF04.EHE. ML:0 0.006689806 0.0896 AML other m 2019-09-24T19:43:04.32
TV.SF04.EHN. ML:0 0.0068531785 0.128 AML other m 2019-09-24T19:43:04.30
IV.MCIV.CHE. ML:1 0.00018339185 0.1664 AML other m 2019-09-24T19:43:06.44
IV.MCIV.CHN. ML:1 0.0001607545 0.128 AML other m 2019-09-24T19:43:06.78
IV.ARCI.HHE. ML:0.6 4.5190135E-5 0.192 AML other m 2019-09-24T19:43:09.04
IV.ARCI.HHN. ML:0.6 3.9259885E-5 0.1408 AML other m 2019-09-24T19:43:08.92
IV.SACS.HHE. ML:0.5 2.3289335E-5 0.256 AML other m 2019-09-24T19:43:10.55
IV.SACS.HHN. ML:0.4 2.138682E-5 0.128 AML other m 2019-09-24T19:43:09.95
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