Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 24-07-2022 and time 01:49:37 (UTC) in region 5 km NW Seggiano (GR)

A magnitude ML 1.3 earthquake occured in region: 5 km NW Seggiano (GR), on

  • 24-07-2022 01:49:37 (UTC)
  • 24-07-2022 03:49:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9620, 11.5260 at 8 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
Seggiano GR 5 961 961
Castel del Piano GR 8 4690 5651
Castiglione d'Orcia SI 9 2346 7997
Arcidosso GR 10 4285 12282
Montalcino SI 12 5093 17375
San Quirico d'Orcia SI 13 2662 20037
Cinigiano GR 13 2618 22655
Santa Fiora GR 15 2622 25277
Abbadia San Salvatore SI 15 6444 31721
Pienza SI 18 2107 33828
Piancastagnaio SI 18 4230 38058
Roccalbegna GR 20 1044 39102
Buonconvento SI 20 3173 42275

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NE of Grosseto (82087 inhabitants)
43 Km SE of Siena (53903 inhabitants)
63 Km SW of Arezzo (99543 inhabitants)
72 Km W of Perugia (166134 inhabitants)
77 Km NW of Viterbo (67173 inhabitants)
93 Km S of Firenze (382808 inhabitants)
93 Km SE of Scandicci (50609 inhabitants)
96 Km W of Foligno (57155 inhabitants)
99 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 1.3 2022-07-24
01:49:37		 42.962 11.5257 8 2023-01-31
19:03:25		 Bollettino Sismico Italiano INGV 107751081
Reviewed
Rev100 		ML 1.4 2022-07-24
01:49:37		 42.9618 11.5197 8 2022-07-24
02:06:48		 Sala Sismica INGV-Roma 107625861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-07-24 01:49:37 ± 0.07
Latitude 42.9620 ± 0.0054
Longitude 11.5257 ± 0.0074
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 107751081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 751
Semi-minor axis of confidence ellipse (meter) 277
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 750.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.05396
Epicentral distance of station farthest from the epicenter (degree) 0.78871
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 107751081
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-01-15 01:25:16

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 107625861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-07-24 02:06:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MURB.HHZ. 2022-07-24T01:49:53.27 0.3 undecidable manual P 67 87.5457 50 0.58 57
IV.MGAB.HHZ. 2022-07-24T01:49:52.63 0.1 undecidable manual S 96 47.9187 50 -0.65 80
IV.ATMI.HHZ. 2022-07-24T01:49:51.06 0.1 undecidable manual P 55 72.8715 50 0.63 77
IV.RIBO.EHZ.01 2022-07-24T01:49:50.70 0.3 undecidable manual S 268 38.9277 50 -0.18 69
IV.FROS.CHN. 2022-07-24T01:49:50.56 0.3 undecidable manual S 313 40.626 50 -0.77 58
IV.SACS.HHZ. 2022-07-24T01:49:49.63 0.3 undecidable manual S 112 33.6441 50 0.17 70
IV.CSNT.HHZ. 2022-07-24T01:49:48.26 0.1 undecidable manual P 342 59.7957 50 -0.16 90
IV.CAFI.HHZ. 2022-07-24T01:49:47.49 0.1 undecidable manual P 41 54.1014 50 -0.05 93
IV.LATE.HHE. 2022-07-24T01:49:47.07 0.1 undecidable manual P 150 44.8218 50 0.97 71
IV.MGAB.HHZ. 2022-07-24T01:49:46.38 0.1 undecidable manual P 96 47.9187 50 -0.21 91
IV.RIBO.EHZ.01 2022-07-24T01:49:45.38 0.1 undecidable manual P 268 38.9277 50 0.18 93
IV.MCIV.CHZ. 2022-07-24T01:49:45.30 0.3 undecidable manual S 149 23.754 110 -0.89 57
IV.FROS.CHN. 2022-07-24T01:49:45.44 0.1 undecidable manual P 313 40.626 50 -0.02 95
IV.SACS.HHZ. 2022-07-24T01:49:44.41 0.1 undecidable manual P 112 33.6441 50 0.03 96
TV.SF11.HHZ. 2022-07-24T01:49:43.21 0.6 undecidable manual S 130 16.1727 117 -0.57 44
IV.MCIV.CHZ. 2022-07-24T01:49:42.50 0.1 undecidable manual P 149 23.754 110 0.01 98
IV.ARCI.HHZ. 2022-07-24T01:49:42.86 0.6 undecidable manual S 199 12.876 123 0.08 50
IV.MALA0.EHZ. 2022-07-24T01:49:41.06 0.6 undecidable manual S 319 6.3936 143 -0.06 50
TV.SF11.HHZ. 2022-07-24T01:49:41.19 0.1 undecidable manual P 130 16.1727 117 0.09 98
IV.MALA4.EHZ. 2022-07-24T01:49:40.90 0.6 undecidable manual S 321 6.1938 144 -0.17 49
IV.MALA1.EHZ. 2022-07-24T01:49:40.90 0.6 undecidable manual S 320 6.0939 144 -0.15 50
IV.MALA3.EHZ. 2022-07-24T01:49:40.89 0.6 undecidable manual S 322 6.0939 144 -0.15 50
IV.ARCI.HHZ. 2022-07-24T01:49:40.68 0.1 positive manual P 199 12.876 123 0.16 97
IV.MALA2.EHZ. 2022-07-24T01:49:40.83 0.6 undecidable manual S 320 5.994 145 -0.2 49
IV.MALA0.EHZ. 2022-07-24T01:49:39.67 0.1 negative manual P 319 6.3936 143 0.11 99
IV.MALA2.EHZ. 2022-07-24T01:49:39.62 0.1 negative manual P 320 5.994 145 0.11 99
IV.MALA1.EHZ. 2022-07-24T01:49:39.64 0.1 negative manual P 320 6.0939 144 0.12 99
IV.MALA3.EHZ. 2022-07-24T01:49:39.60 0.1 negative manual P 322 6.0939 144 0.08 100
IV.MALA4.EHZ. 2022-07-24T01:49:39.62 0.1 negative manual P 321 6.1938 144 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARCI.HNE. ML:1.6 0.00040818475 0.14 AML other m 2022-07-24T01:49:43.16
IV.ARCI.HHE. ML:1.6 0.00046721145 0.12 AML other m 2022-07-24T01:49:43.16
IV.ARCI.HHN. ML:1.6 0.0004305 0.1 AML other m 2022-07-24T01:49:43.23
IV.ARCI.HNN. ML:1.5 0.000402 0.12 AML other m 2022-07-24T01:49:43.23
IV.RIBO.EHE.01 ML:1.4 0.00009087599 0.22 AML other m 2022-07-24T01:49:52.55
IV.MGAB.HHN. ML:0.7 0.00001739542 1.86 AML other m 2022-07-24T01:49:53.98
IV.SACS.HHE. ML:0.7 0.000021721905 1.64 AML other m 2022-07-24T01:49:53.99
IV.RIBO.EHN.01 ML:1.2 0.000054014445 0.18 AML other m 2022-07-24T01:49:54.33
IV.MGAB.HHE. ML:0.7 0.00001435 1.12 AML other m 2022-07-24T01:49:56.15
IV.CSNT.HHN. ML:1.2 0.00003095 0.22 AML other m 2022-07-24T01:49:57.23
IV.CSNT.HHE. ML:1.2 0.00003445 0.9 AML other m 2022-07-24T01:49:57.41
IV.MGAB.HNE. ML:1.6 0.00010833012 0.6 AML other m 2022-07-24T01:50:00.33
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