Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 02-06-2021 and time 01:23:48 (Italy) in region 5 km SE Siena (SI)

A magnitude ML 1.8 earthquake occured in region: 5 km SE Siena (SI), on

  • 01-06-2021 23:23:48 (UTC)
  • 02-06-2021 01:23:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2880, 11.3720 at 10 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
Siena SI 5 53903 53903
Monteroni d'Arbia SI 8 9088 62991
Sovicille SI 12 10116 73107
Castelnuovo Berardenga SI 13 9097 82204
Murlo SI 13 2389 84593
Asciano SI 16 7118 91711
Monteriggioni SI 17 9810 101521
Buonconvento SI 19 3173 104694
Rapolano Terme SI 19 5249 109943

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km SE of Siena (53903 inhabitants)
46 Km W of Arezzo (99543 inhabitants)
54 Km S of Firenze (382808 inhabitants)
55 Km S of Scandicci (50609 inhabitants)
62 Km NE of Grosseto (82087 inhabitants)
70 Km SE of Prato (191150 inhabitants)
81 Km SE of Pistoia (90315 inhabitants)
85 Km W of Perugia (166134 inhabitants)
91 Km E of Livorno (159219 inhabitants)
92 Km SE of Pisa (89158 inhabitants)
94 Km SE of Lucca (89046 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 1.8 2021-06-01
23:23:48		 43.2885 11.3718 10 2021-12-29
11:12:15		 Bollettino Sismico Italiano INGV 93269371
Reviewed
Rev100 		ML 1.8 2021-06-01
23:23:48		 43.2952 11.3757 9 2021-06-01
23:32:19		 Sala Sismica INGV-Roma 90707891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-01 23:23:48 ± 0.16
Latitude 43.2885 ± 0.0045
Longitude 11.3718 ± 0.0124
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93269371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 788
Semi-minor axis of confidence ellipse (meter) 583
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 276
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.00634
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 93269371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-27 13:38:31

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 90707891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-01 23:32:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZONE.HHZ. 2021-06-01T23:25:03.02 3.0 undecidable manual Sn -0.49 0
IV.MURB.HHZ. 2021-06-01T23:24:17.58 0.3 undecidable manual S 91 93.1401 50 1.14 46
IV.SEI.HHZ. 2021-06-01T23:24:15.01 0.3 undecidable manual S 359 84.9483 50 0.75 56
IV.PARC.HHZ. 2021-06-01T23:24:13.42 0.6 undecidable manual S 60 80.364 50 0.38 43
IV.MOCL.EHZ. 2021-06-01T23:24:12.64 3.0 undecidable manual S 349 80.364 50 -0.47 0
IV.SSP9.EHZ. 2021-06-01T23:24:10.07 0.6 undecidable manual S 62 68.8755 50 0.1 46
IV.CELB.HHZ. 2021-06-01T23:24:08.88 0.6 undecidable manual P 238 111.6993 50 1.26 28
IV.CRMI.HHZ. 2021-06-01T23:24:08.07 0.3 undecidable manual S 331 64.491 50 -0.72 59
IV.MCIV.CHZ. 2021-06-01T23:24:07.28 0.1 undecidable manual S 156 61.6938 50 -0.77 78
IV.CRE.HHZ. 2021-06-01T23:24:07.30 0.6 undecidable manual S 52 59.3961 50 -0.13 47
TV.SF14.HHN. 2021-06-01T23:24:07.39 0.1 undecidable manual S 162 62.3931 50 -0.83 76
IV.RUFI.EHZ. 2021-06-01T23:24:07.40 0.3 undecidable manual S 10 61.9935 50 -0.72 60
IV.BDI.HHZ. 2021-06-01T23:24:07.23 0.1 undecidable manual P 324 106.116 50 0.47 80
TV.SF03.EHN. 2021-06-01T23:24:06.72 0.3 undecidable manual S 155 59.5959 50 -0.76 59
IV.MURB.HHZ. 2021-06-01T23:24:05.42 0.1 undecidable manual P 91 93.1401 50 0.66 76
TV.SF11.HHZ. 2021-06-01T23:24:05.04 0.3 undecidable manual S 152 52.8027 50 -0.63 63
GU.MAIM.HHZ. 2021-06-01T23:24:05.89 3.0 undecidable manual P 0.13 0
TV.SF01.EHZ. 2021-06-01T23:24:05.60 0.3 undecidable manual S 164 55.1004 50 -0.68 61
TV.SF04.EHZ. 2021-06-01T23:24:05.60 0.3 undecidable manual S 155 55.4001 50 -0.77 59
IV.ARCI.HHZ. 2021-06-01T23:24:04.20 0.3 undecidable manual S 170 49.1175 50 -0.5 67
IV.LMD.HHZ. 2021-06-01T23:24:04.55 0.1 undecidable manual P 17 91.5417 50 0.03 90
IV.SEI.HHZ. 2021-06-01T23:24:03.93 0.6 undecidable manual P 359 84.9483 50 0.43 42
IV.MOCL.EHZ. 2021-06-01T23:24:03.39 3.0 undecidable manual P 349 80.364 50 0.53 0
IV.CAFI.HHZ. 2021-06-01T23:24:03.60 0.3 undecidable manual S 84 48.2184 50 -0.84 58
IV.PII.HHZ. 2021-06-01T23:24:03.18 0.3 undecidable manual P 306 83.3499 50 -0.08 68
IV.ATMI.HHZ. 2021-06-01T23:24:02.63 0.6 undecidable manual P 86 72.4719 50 1.05 33
IV.PARC.HHZ. 2021-06-01T23:24:02.93 0.1 undecidable manual P 60 80.364 50 0.14 90
IV.SFI.EHZ. 2021-06-01T23:24:02.55 0.3 undecidable manual P 29 78.2661 50 0.08 69
IV.CASP.HHZ. 2021-06-01T23:24:01.87 0.1 undecidable manual P 217 68.7756 50 0.86 74
IV.SSP9.EHZ. 2021-06-01T23:24:01.39 0.1 undecidable manual P 62 68.8755 50 0.37 88
IV.MGAB.HHZ. 2021-06-01T23:24:01.75 0.3 undecidable manual P 125 73.0713 50 0.09 69
IV.MCIV.CHZ. 2021-06-01T23:24:00.24 0.1 negative manual P 156 61.6938 50 0.33 90
IV.SACS.HHZ. 2021-06-01T23:24:00.94 0.3 undecidable manual P 138 65.3901 50 0.46 65
IV.CRMI.HHZ. 2021-06-01T23:24:00.35 0.3 undecidable manual P 331 64.491 50 0.01 72
IV.ASQU.HHZ. 2021-06-01T23:24:00.57 0.3 undecidable manual P 31 65.5899 50 0.05 71
TV.SF14.HHN. 2021-06-01T23:24:00.32 0.3 undecidable manual P 162 62.3931 50 0.31 68
IV.RUFI.EHZ. 2021-06-01T23:23:59.69 0.1 undecidable manual P 10 61.9935 50 -0.26 91
IV.CRE.HHZ. 2021-06-01T23:23:59.61 0.1 undecidable manual P 52 59.3961 50 0.06 95
TV.SF04.EHZ. 2021-06-01T23:23:59.24 0.1 negative manual P 155 55.4001 50 0.3 91
TV.SF03.EHN. 2021-06-01T23:23:59.82 0.3 undecidable manual P 155 59.5959 50 0.23 69
TV.SF01.EHZ. 2021-06-01T23:23:59.24 0.1 positive manual P 164 55.1004 50 0.35 90
TV.SF11.HHZ. 2021-06-01T23:23:58.77 0.3 undecidable manual P 152 52.8027 50 0.23 70
IV.ARCI.HHZ. 2021-06-01T23:23:58.16 0.1 undecidable manual P 170 49.1175 50 0.18 95
IV.RIBO.EHZ.01 2021-06-01T23:23:57.76 0.1 undecidable manual P 215 45.9207 50 0.27 93
IV.CAFI.HHZ. 2021-06-01T23:23:57.69 0.1 undecidable manual P 84 48.2184 50 -0.14 96
IV.FROS.CHZ. 2021-06-01T23:23:56.40 0.6 undecidable manual S 243 19.4694 116 0.06 51
IV.CSNT.HHZ. 2021-06-01T23:23:55.47 0.1 undecidable manual S 342 21.5673 114 -1.51 58
IV.FROS.CHZ. 2021-06-01T23:23:53.33 0.1 positive manual P 243 19.4694 116 0.18 100
IV.CSNT.HHZ. 2021-06-01T23:23:52.70 0.1 negative manual P 342 21.5673 114 -0.81 82
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.5 0.002365 0.3 AML other m 2021-06-01T23:23:55.75
IV.CSNT.HHE. ML:2.6 0.00273 0.26 AML other m 2021-06-01T23:23:55.90
IV.FROS.CHE. ML:2.7 0.0036799999999999997 0.16 AML other m 2021-06-01T23:23:56.58
IV.FROS.CHN. ML:2.5 0.002535 1.2 AML other m 2021-06-01T23:23:57.60
IV.CAFI.HHN. ML:1.8 0.0001905 1.64 AML other m 2021-06-01T23:24:03.96
IV.CAFI.HHE. ML:1.7 0.0001515 0.32 AML other m 2021-06-01T23:24:04.42
IV.ARCI.HHN. ML:1.7 0.0001225 0.16 AML other m 2021-06-01T23:24:05.88
TV.SF01.EHN. ML:2.3 0.00042800000000000005 0.14 AML other m 2021-06-01T23:24:05.91
TV.SF01.EHE. ML:2.1 0.00028700000000000004 1.5 AML other m 2021-06-01T23:24:06.86
IV.ARCI.HHE. ML:1.9 0.00019700000000000002 0.74 AML other m 2021-06-01T23:24:07.44
TV.SF04.EHN. ML:2.2 0.00036449999999999997 0.78 AML other m 2021-06-01T23:24:08.00
IV.CRE.HHE. ML:2.1 0.000262 0.3 AML other m 2021-06-01T23:24:08.21
TV.SF04.EHE. ML:2.3 0.0004895 0.98 AML other m 2021-06-01T23:24:08.94
IV.MCIV.CHN. ML:1.6 0.00008405 0.18 AML other m 2021-06-01T23:24:09.15
IV.CRE.HHN. ML:2.0 0.0002055 0.42 AML other m 2021-06-01T23:24:09.10
IV.ASQU.HHE. ML:1.7 0.00008925 0.34 AML other m 2021-06-01T23:24:09.35
IV.CELB.HHE. ML:1.7 0.00004265 0.38 AML other m 2021-06-01T23:24:09.72
IV.SSP9.EHE. ML:1.9 0.00012539999999999999 0.48 AML other m 2021-06-01T23:24:11.66
IV.MCIV.CHE. ML:1.6 0.00008560000000000001 0.24 AML other m 2021-06-01T23:24:11.86
IV.CRMI.HHN. ML:1.6 0.0000682 0.5 AML other m 2021-06-01T23:24:11.76
IV.CRMI.HHE. ML:1.3 0.0000347 0.58 AML other m 2021-06-01T23:24:12.98
IV.CASP.HHN. ML:1.6 0.0000609 0.76 AML other m 2021-06-01T23:24:13.09
IV.CASP.HHE. ML:1.5 0.0000538 0.3 AML other m 2021-06-01T23:24:13.12
IV.MOCL.EHE. ML:2.3 0.00027949999999999996 0.64 AML other m 2021-06-01T23:24:13.61
IV.PARC.HHE. ML:1.6 0.000058649999999999996 0.32 AML other m 2021-06-01T23:24:14.02
IV.SACS.HHE. ML:1.4 0.000043249999999999994 0.2 AML other m 2021-06-01T23:24:14.16
IV.ASQU.HHN. ML:1.5 0.0000543 0.38 AML other m 2021-06-01T23:24:14.22
IV.SSP9.EHN. ML:1.9 0.00013350000000000002 0.64 AML other m 2021-06-01T23:24:14.10
IV.MOCL.EHN. ML:2.2 0.0002345 0.38 AML other m 2021-06-01T23:24:14.56
IV.PII.HHE. ML:1.5 0.0000441 0.28 AML other m 2021-06-01T23:24:15.20
IV.SFI.EHE. ML:1.4 0.000039699999999999996 0.36 AML other m 2021-06-01T23:24:15.25
IV.SACS.HHN. ML:1.3 0.00003915 0.78 AML other m 2021-06-01T23:24:15.07
IV.SFI.EHN. ML:1.4 0.000036200000000000006 0.68 AML other m 2021-06-01T23:24:15.89
IV.MGAB.HHE. ML:1.7 0.00007475 0.84 AML other m 2021-06-01T23:24:15.60
IV.SEI.HHE. ML:2.2 0.000194 0.24 AML other m 2021-06-01T23:24:15.87
IV.PII.HHN. ML:1.9 0.00009305 1.28 AML other m 2021-06-01T23:24:15.22
IV.MGAB.HHN. ML:1.8 0.00009234999999999998 1.84 AML other m 2021-06-01T23:24:15.96
IV.SEI.HHN. ML:2.5 0.00038950000000000003 0.36 AML other m 2021-06-01T23:24:16.40
IV.ATMI.HHE. ML:2.5 0.00046750000000000003 0.32 AML other m 2021-06-01T23:24:17.33
IV.PARC.HHN. ML:1.8 0.00008615000000000001 0.76 AML other m 2021-06-01T23:24:17.86
IV.ATMI.HHN. ML:2.3 0.00033350000000000003 0.44 AML other m 2021-06-01T23:24:18.53
IV.MURB.HHN. ML:2.2 0.00017999999999999998 0.28 AML other m 2021-06-01T23:24:19.44
IV.LMD.HHE. ML:1.6 0.000043950000000000004 1.34 AML other m 2021-06-01T23:24:19.79
IV.LMD.HHN. ML:1.7 0.00005275000000000001 0.26 AML other m 2021-06-01T23:24:19.76
IV.MURB.HHE. ML:2.3 0.0001985 0.26 AML other m 2021-06-01T23:24:20.32
GU.MAIM.HHN. ML:1.3 0.0000213 0.48 AML other m 2021-06-01T23:24:22.77
IV.BDI.HHN. ML:1.5 0.000028049999999999997 1.62 AML other m 2021-06-01T23:24:23.93
IV.CELB.HHN. ML:1.6 0.0000305 0.96 AML other m 2021-06-01T23:24:24.61
GU.MAIM.HHE. ML:1.2 0.00001485 0.64 AML other m 2021-06-01T23:24:26.18
IV.BDI.HHE. ML:1.4 0.000026349999999999997 0.36 AML other m 2021-06-01T23:24:28.30
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