Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 19-10-2023 and time 00:03:41 (UTC) in region 4 km W San Casciano dei Bagni (SI)

A magnitude ML 2.1 earthquake occured in region: 4 km W San Casciano dei Bagni (SI), on

  • 19-10-2023 00:03:41 (UTC)
  • 19-10-2023 02:03:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8890, 11.8330 at 8 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
San Casciano dei Bagni SI 4 1632 1632
Radicofani SI 6 1097 2729
Cetona SI 10 2755 5484
Sarteano SI 12 4717 10201
Piancastagnaio SI 12 4230 14431
Abbadia San Salvatore SI 13 6444 20875
Allerona TR 14 1794 22669
Proceno VT 15 557 23226
Fabro TR 15 2876 26102
Città della Pieve PG 16 7712 33814
Acquapendente VT 16 5506 39320
Castell'Azzara GR 17 1476 40796
Chiusi SI 17 8704 49500
Monteleone d'Orvieto TR 18 1467 50967
Chianciano Terme SI 19 7105 58072
Ficulle TR 20 1669 59741

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km W of Perugia (166134 inhabitants)
57 Km NW of Viterbo (67173 inhabitants)
60 Km E of Grosseto (82087 inhabitants)
63 Km SE of Siena (53903 inhabitants)
65 Km S of Arezzo (99543 inhabitants)
71 Km W of Foligno (57155 inhabitants)
76 Km W of Terni (111501 inhabitants)
89 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 2.1 2023-10-19
00:03:41		 42.8887 11.8333 8 2023-10-19
00:10:58		 Sala Sismica INGV-Roma 122185031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-19 00:03:41 ± 0.1
Latitude 42.8887 ± 0.0081
Longitude 11.8333 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122185031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 860
Semi-minor axis of confidence ellipse (meter) 511
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 174
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) 60
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.81479
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 13
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 72
Type of magnitude ML
Reference to an origin 122185031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-19 00:10:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGR.HNZ. 2023-10-19T00:05:39.77 3.0 undecidable manual Sg 10.72 0
NI.POLC.HHZ. 2023-10-19T00:05:09.99 3.0 undecidable manual Sn -0.02 0
IV.MCRV.HHZ. 2023-10-19T00:04:41.66 3.0 undecidable manual Pg 8.8 0
IV.VAGA.HHZ. 2023-10-19T00:04:23.73 3.0 negative manual Pg 3.89 0
IV.PTRJ.HHZ. 2023-10-19T00:04:22.05 3.0 undecidable manual Pn -0.59 0
IV.SGG.HHZ. 2023-10-19T00:04:22.52 3.0 negative manual Pn 1.28 0
IV.SACR.HHZ. 2023-10-19T00:04:22.33 3.0 negative manual Pn -1.48 0
IV.TRIV.HHZ. 2023-10-19T00:04:21.32 3.0 positive manual Pn 1.65 0
IV.CSNT.HHZ. 2023-10-19T00:04:05.21 0.3 undecidable manual S 326 78.366 50 -0.48 61
IV.BARO.EHZ. 2023-10-19T00:04:04.35 0.6 undecidable manual S 166 73.2711 50 0.01 45
IV.ATCC.EHZ. 2023-10-19T00:04:04.25 3.0 undecidable manual S -1.04 0
IV.MURB.HHZ. 2023-10-19T00:04:04.33 3.0 undecidable manual S 0.18 0
IV.RM33.EHZ. 2023-10-19T00:04:02.02 3.0 positive manual P -0.88 0
IV.SMA1.EHZ. 2023-10-19T00:04:02.93 3.0 undecidable manual P -0.6 0
IV.MMO1.EHZ. 2023-10-19T00:04:02.79 3.0 positive manual P -0.14 0
IV.ATMI.HHZ. 2023-10-19T00:04:01.50 0.6 undecidable manual S 35 60.6948 50 0.52 41
IV.RUFI.EHZ. 2023-10-19T00:04:01.05 3.0 undecidable manual P 0.4 0
IV.FDMO.HHZ. 2023-10-19T00:04:00.22 3.0 positive manual P 0.25 0
IV.NRCA.HHZ. 2023-10-19T00:03:59.59 3.0 negative manual P -0.67 0
IV.CAFI.HHZ. 2023-10-19T00:03:57.56 0.6 undecidable manual S 12 50.0166 50 -0.58 41
IV.SRES.HHZ. 2023-10-19T00:03:57.43 3.0 positive manual P -0.92 0
IV.PARC.HHZ. 2023-10-19T00:03:57.67 0.1 negative manual P 21 90.4428 50 0.32 82
IV.CASP.HHZ. 2023-10-19T00:03:57.08 3.0 negative manual P 0.68 0
IV.PIEI.HHZ. 2023-10-19T00:03:57.61 3.0 negative manual P -0.17 0
IV.TRIF.CHZ. 2023-10-19T00:03:56.76 3.0 negative manual P 0.54 0
IV.CRE.HHZ. 2023-10-19T00:03:56.43 0.3 undecidable manual P 7 81.5517 50 0.45 61
IV.BADI.EHZ. 2023-10-19T00:03:55.48 0.1 negative manual P 26 76.4679 50 0.28 85
IV.ASSB.HHZ. 2023-10-19T00:03:55.14 3.0 negative manual P 0.9 0
IV.CSNT.HHZ. 2023-10-19T00:03:55.55 0.6 negative manual P 326 78.366 50 0.07 44
IV.ATPI.EHZ. 2023-10-19T00:03:55.24 3.0 positive manual P -0.2 0
IV.ATCC.EHZ. 2023-10-19T00:03:54.67 3.0 negative manual P -0.18 0
IV.CESX.HHZ. 2023-10-19T00:03:54.17 3.0 negative manual P -0.31 0
IV.ATVO.HHZ. 2023-10-19T00:03:54.02 3.0 positive manual P -0.47 0
IV.BARO.EHZ. 2023-10-19T00:03:54.29 0.6 undecidable manual P 166 73.2711 50 -0.41 42
IV.RIBO.EHZ.01 2023-10-19T00:03:54.00 0.1 positive manual P 276 64.2912 50 0.69 77
IV.ATMI.HHZ. 2023-10-19T00:03:52.18 0.3 positive manual P 35 60.6948 50 -0.58 61
IV.ARCI.HHZ. 2023-10-19T00:03:51.34 0.3 undecidable manual S 262 29.3484 104 -0.72 61
IV.CAFI.HHZ. 2023-10-19T00:03:50.67 0.6 positive manual P 12 50.0166 50 -0.45 43
IV.MGAB.HHZ. 2023-10-19T00:03:49.38 0.3 undecidable manual S 83 22.755 108 -0.49 67
IV.ARCI.HHZ. 2023-10-19T00:03:47.59 0.1 negative manual P 262 29.3484 104 -0.02 98
IV.MCIV.CHZ. 2023-10-19T00:03:47.82 0.3 undecidable manual S 226 17.6712 113 -0.38 70
TV.SF11.HHZ. 2023-10-19T00:03:46.83 0.3 undecidable manual S 260 12.7761 121 0.16 73
IV.MGAB.HHZ. 2023-10-19T00:03:46.00 0.6 undecidable manual P 83 22.755 108 -0.34 46
IV.MCIV.CHZ. 2023-10-19T00:03:45.39 0.1 positive manual P 226 17.6712 113 0.01 100
IV.SACS.HHZ. 2023-10-19T00:03:45.47 0.3 undecidable manual S 125 7.5813 135 0.23 73
TV.SF11.HHZ. 2023-10-19T00:03:44.92 0.1 negative manual P 260 12.7761 121 0.42 93
IV.SACS.HHZ. 2023-10-19T00:03:43.89 0.1 undecidable manual P 125 7.5813 135 0.22 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HHE. ML:2.4 0.0040816490000000006 0.48 AML other m 2023-10-19T00:03:47.31
IV.SACS.HNE. ML:2.4 0.00532 1.6 AML other m 2023-10-19T00:03:45.02
IV.SACS.HHN. ML:2.3 0.003477377 0.12 AML other m 2023-10-19T00:03:45.88
IV.SACS.HNN. ML:2.2 0.0031480270000000003 0.1 AML other m 2023-10-19T00:03:45.88
TV.SF11.HHN. ML:2.8 0.0070350000000000005 0.36 AML other m 2023-10-19T00:03:47.21
TV.SF11.HHE. ML:2.5 0.003972265 0.32 AML other m 2023-10-19T00:03:47.28
IV.MCIV.CHE. ML:2.2 0.00132769365 0.312 AML other m 2023-10-19T00:03:49.21
IV.MCIV.CHN. ML:2.2 0.0014178345000000001 0.104 AML other m 2023-10-19T00:03:48.98
IV.MGAB.HNN. ML:2.4 0.0018441 0.28 AML other m 2023-10-19T00:03:52.35
IV.MGAB.HHN. ML:2.5 0.0019853735 0.26 AML other m 2023-10-19T00:03:52.35
IV.MGAB.HHE. ML:2.5 0.002028057 0.46 AML other m 2023-10-19T00:03:53.08
IV.MGAB.HNE. ML:2.4 0.001905298 0.45 AML other m 2023-10-19T00:03:53.09
IV.ARCI.HHN. ML:2.2 0.0007505 1.62 AML other m 2023-10-19T00:03:53.08
IV.ARCI.HNN. ML:2.1 0.0007275000000000001 1.62 AML other m 2023-10-19T00:03:53.08
IV.ARCI.HHE. ML:2.0 0.0005605 0.44 AML other m 2023-10-19T00:03:55.11
IV.ARCI.HNE. ML:2.0 0.0005349999999999999 0.46 AML other m 2023-10-19T00:03:55.11
IV.CAFI.HHE. ML:1.9 0.00020416985 0.34 AML other m 2023-10-19T00:04:00.70
IV.CAFI.HNE. ML:1.9 0.0001976901 0.34 AML other m 2023-10-19T00:04:00.53
IV.CASP.HHE. ML:1.3 0.000032005110000000004 1.02 AML other m 2023-10-19T00:04:03.44
IV.PIEI.HHN. ML:1.9 0.0000882 1.66 AML other m 2023-10-19T00:03:59.94
IV.CRE.HHN. ML:2.1 0.00016999999999999999 0.38 AML other m 2023-10-19T00:04:02.23
IV.CAFI.HNN. ML:1.8 0.000155 0.4 AML other m 2023-10-19T00:04:02.63
IV.CAFI.HHN. ML:1.8 0.00015769685 0.4 AML other m 2023-10-19T00:04:03.20
IV.CESX.HHE. ML:1.8 0.00010899999999999999 1.16 AML other m 2023-10-19T00:04:06.01
IV.ASSB.HHE. ML:2.1 0.00023743550000000001 0.48 AML other m 2023-10-19T00:04:06.99
IV.ATVO.HHN. ML:2.2 0.0002864598 0.38 AML other m 2023-10-19T00:04:06.66
IV.ATVO.HNN. ML:2.3 0.00029527735 0.61 AML other m 2023-10-19T00:04:07.31
IV.CESX.HHN. ML:1.8 0.00011005 0.54 AML other m 2023-10-19T00:04:07.02
IV.ATVO.HHE. ML:2.4 0.000423 0.5 AML other m 2023-10-19T00:04:07.16
IV.ATVO.HNE. ML:2.4 0.0004295 0.82 AML other m 2023-10-19T00:04:07.00
IV.ATPI.EHE. ML:2.1 0.00017199999999999998 0.44 AML other m 2023-10-19T00:04:08.37
IV.BARO.HNE. ML:2.3 0.00031800000000000003 0.54 AML other m 2023-10-19T00:04:08.37
IV.ATPI.EHN. ML:2.1 0.0001894246 0.36 AML other m 2023-10-19T00:04:09.68
IV.BADI.EHE. ML:1.9 0.00013120321 0.38 AML other m 2023-10-19T00:04:09.32
IV.BADI.EHN. ML:2.0 0.000158 0.48 AML other m 2023-10-19T00:04:09.07
IV.CSNT.HHN. ML:1.8 0.00009632105500000001 0.28 AML other m 2023-10-19T00:04:07.54
IV.CSNT.HHE. ML:1.9 0.00012576290499999998 0.36 AML other m 2023-10-19T00:04:07.68
IV.ASSB.HHN. ML:2.0 0.000191 1.32 AML other m 2023-10-19T00:04:09.28
IV.CASP.HHN. ML:1.6 0.00004910000000000001 0.78 AML other m 2023-10-19T00:04:10.25
IV.PIEI.HHE. ML:2.2 0.0001835 0.4 AML other m 2023-10-19T00:04:11.34
IV.BARO.HNN. ML:2.4 0.00038161805 0.8 AML other m 2023-10-19T00:04:07.75
IV.CRE.HHE. ML:2.0 0.000123109065 0.6 AML other m 2023-10-19T00:04:11.74
IV.FDMO.HHE. ML:2.0 0.00009355 1.22 AML other m 2023-10-19T00:04:13.77
IV.PARC.HHE. ML:2.1 0.00013744216 0.36 AML other m 2023-10-19T00:04:14.67
IV.NRCA.HHN. ML:2.1 0.00012365 0.46 AML other m 2023-10-19T00:04:14.72
IV.FDMO.HHN. ML:1.9 0.00006962838 0.42 AML other m 2023-10-19T00:04:17.85
IV.PARC.HHN. ML:2.1 0.0001525 0.46 AML other m 2023-10-19T00:04:16.24
IV.NRCA.HHE. ML:1.8 0.00006236845 0.32 AML other m 2023-10-19T00:04:16.52
IV.RM33.EHE. ML:1.9 0.00006346638 0.58 AML other m 2023-10-19T00:04:22.98
IV.RM33.EHN. ML:1.9 0.0000616 0.66 AML other m 2023-10-19T00:04:24.62
IV.SMA1.EHN. ML:2.3 0.000132 1.18 AML other m 2023-10-19T00:04:26.80
IV.SMA1.EHE. ML:2.3 0.000124 0.6 AML other m 2023-10-19T00:04:30.23
IV.RIBO.EHE.01 ML:1.8 0.000135199935 0.24 AML other m 2023-10-19T00:03:56.22
IV.RIBO.EHN.01 ML:2.0 0.00017144387 1.22 AML other m 2023-10-19T00:04:18.48
IV.BARO.EHE. ML:1.2 0.000027329770000000002 0.68 AML other m 2023-10-19T00:04:07.90
IV.BARO.EHN. ML:2.4 0.00038339060000000004 0.7 AML other m 2023-10-19T00:04:07.75
IV.ATPI.HNE. ML:2.1 0.000201242525 0.44 AML other m 2023-10-19T00:04:10.07
IV.ATPI.HNN. ML:2.2 0.00022213925 0.35 AML other m 2023-10-19T00:04:09.67
IV.TRIF.CHE. ML:1.7 0.000068363535 0.232 AML other m 2023-10-19T00:04:00.23
IV.TRIF.CHN. ML:1.6 0.00006107852 0.256 AML other m 2023-10-19T00:03:58.35
IV.CASP.HNE. ML:2.0 0.00015519185000000002 1.3 AML other m 2023-10-19T00:04:07.12
IV.CASP.HNN. ML:2.0 0.00014183715 1.26 AML other m 2023-10-19T00:04:21.62
IV.SRES.HHE. ML:1.6 0.00004611854 0.46 AML other m 2023-10-19T00:04:11.09
IV.SRES.HHN. ML:1.7 0.000055339825000000003 0.92 AML other m 2023-10-19T00:04:14.90
IV.PIEI.HNE. ML:2.2 0.000161583 0.45 AML other m 2023-10-19T00:04:11.38
IV.PIEI.HNN. ML:2.1 0.00014523055500000002 0.49 AML other m 2023-10-19T00:04:11.34
IV.NRCA.HNE. ML:2.2 0.00013058841999999998 0.56 AML other m 2023-10-19T00:04:02.21
IV.NRCA.HNN. ML:2.3 0.00017849835 1.01 AML other m 2023-10-19T00:04:29.19
IV.RUFI.EHE. ML:1.6 0.0000349899 0.46 AML other m 2023-10-19T00:04:16.47
IV.RUFI.EHN. ML:1.8 0.000062121175 1.6 AML other m 2023-10-19T00:04:40.94
IV.RM33.HNE. ML:2.4 0.00017081406400000002 0.55 AML other m 2023-10-19T00:04:39.45
IV.RM33.HNN. ML:2.3 0.00014455445 0.9 AML other m 2023-10-19T00:04:11.88
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
Waveforms Seismic signals in miniseed + resp format Download