Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 01-06-2021 and time 19:09:20 (Italy) in region 4 km SE Siena (SI)

A magnitude ML 2.1 earthquake occured in region: 4 km SE Siena (SI), on

  • 01-06-2021 17:09:20 (UTC)
  • 01-06-2021 19:09:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2900, 11.3570 at 11 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 4 53903 53903
Monteroni d'Arbia SI 8 9088 62991
Sovicille SI 10 10116 73107
Castelnuovo Berardenga SI 13 9097 82204
Murlo SI 14 2389 84593
Monteriggioni SI 16 9810 94403
Asciano SI 18 7118 101521
Buonconvento SI 20 3173 104694

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km SE of Siena (53903 inhabitants)
47 Km W of Arezzo (99543 inhabitants)
54 Km S of Scandicci (50609 inhabitants)
54 Km S of Firenze (382808 inhabitants)
62 Km NE of Grosseto (82087 inhabitants)
69 Km SE of Prato (191150 inhabitants)
80 Km SE of Pistoia (90315 inhabitants)
86 Km W of Perugia (166134 inhabitants)
90 Km E of Livorno (159219 inhabitants)
90 Km SE of Pisa (89158 inhabitants)
93 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 2.1 2021-06-01
17:09:20		 43.2903 11.357 11 2021-12-29
11:12:15		 Bollettino Sismico Italiano INGV 93268581
Reviewed
Rev100 		ML 2.0 2021-06-01
17:09:20		 43.2972 11.3673 9 2021-06-01
17:20:41		 Sala Sismica INGV-Roma 90701521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-01 17:09:20 ± 0.06
Latitude 43.2903 ± 0.0027
Longitude 11.3570 ± 0.0025
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93268581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 300
Semi-minor axis of confidence ellipse (meter) 53
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 330
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 64
Number of defining phases 45
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.28693
Number of stations at which the event was observed 45
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 53
Type of magnitude ML
Reference to an origin 90701521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-01 17:20:41

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 57
Type of magnitude ML
Reference to an origin 93268581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-27 12:54:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CET2.HHZ. 2021-06-01T17:10:51.03 3.0 undecidable manual Pg 14.51 0
IV.SACR.HNZ. 2021-06-01T17:10:49.92 3.0 undecidable manual Sn 2.84 0
IV.GIZZ.HHZ. 2021-06-01T17:10:47.76 3.0 negative manual Pn 3.72 0
IV.MIDA.HHZ. 2021-06-01T17:10:46.08 3.0 undecidable manual Sg 9.2 0
IV.PIPA.HHZ. 2021-06-01T17:10:42.92 3.0 undecidable manual Pn -0.29 0
CR.ZAG.BHZ. 2021-06-01T17:10:38.42 3.0 undecidable manual Pg 15.38 0
IV.PZUN.HHZ. 2021-06-01T17:10:35.02 3.0 positive manual Pg 10.45 0
IV.TREG.EHZ. 2021-06-01T17:10:23.30 3.0 undecidable manual Sn -1.26 0
IV.VIVA.HHZ. 2021-06-01T17:10:17.47 3.0 undecidable manual Sn 0.94 0
IV.SBPO.HNZ. 2021-06-01T17:10:13.78 3.0 undecidable manual Sn 0.11 0
IV.MIDA.HHZ. 2021-06-01T17:10:11.26 3.0 positive manual Pg 7.82 0
IV.NDIM.HNZ. 2021-06-01T17:10:09.56 3.0 undecidable manual S -0.26 0
IV.ARVD.HHZ. 2021-06-01T17:10:02.03 3.0 undecidable manual S 3.19 0
IV.OFFI.HHZ. 2021-06-01T17:09:54.42 3.0 undecidable manual Pg 4.39 0
IV.SAP2.EHZ. 2021-06-01T17:09:51.97 3.0 negative manual P 5.21 0
IV.SEI.HHZ. 2021-06-01T17:09:46.40 0.3 undecidable manual S 0 84.7485 90 0.4 62
IV.ATVO.HHZ. 2021-06-01T17:09:46.72 0.3 undecidable manual S 83 85.248 90 0.57 60
IV.FDMO.HHZ. 2021-06-01T17:09:45.22 0.6 undecidable manual P 101 142.8459 90 0.87 31
IV.PARC.HHZ. 2021-06-01T17:09:45.50 0.6 undecidable manual S 60 81.3519 90 0.41 42
IV.MOCL.EHZ. 2021-06-01T17:09:44.70 0.6 undecidable manual S 350 80.5638 90 -0.17 43
GU.GSCL.HHZ. 2021-06-01T17:09:43.25 3.0 positive manual P 0.85 0
IV.BADI.EHZ. 2021-06-01T17:09:43.60 0.6 undecidable manual S 71 75.5688 90 0.06 45
IV.SSP9.EHZ. 2021-06-01T17:09:42.20 0.3 undecidable manual S 63 69.8745 90 0.17 67
IV.CELB.HHZ. 2021-06-01T17:09:40.71 3.0 undecidable manual P 0.99 0
IV.ASQU.HHZ. 2021-06-01T17:09:40.90 0.3 undecidable manual S 32 66.0894 90 -0.11 67
IV.ASSB.HHZ. 2021-06-01T17:09:39.50 3.0 undecidable manual P -0.16 0
IV.RUFI.EHZ. 2021-06-01T17:09:39.60 0.3 undecidable manual S 11 61.9935 90 -0.32 65
IV.MCIV.CHE. 2021-06-01T17:09:39.40 0.3 undecidable manual S 155 62.3931 90 -0.63 58
IV.FOSV.EHZ. 2021-06-01T17:09:39.84 3.0 undecidable manual P -0.27 0
IV.CRE.HHZ. 2021-06-01T17:09:39.40 0.3 undecidable manual S 53 60.1953 90 -0.05 69
TV.SF14.HHN. 2021-06-01T17:09:39.40 0.1 undecidable manual S 161 62.8926 90 -0.78 72
TV.SF03.EHN. 2021-06-01T17:09:38.70 0.3 undecidable manual S 154 60.2952 90 -0.77 55
TV.SF11.HHZ. 2021-06-01T17:09:37.00 0.1 undecidable manual S 151 53.6019 90 -0.68 77
TV.SF04.EHZ. 2021-06-01T17:09:37.70 0.3 undecidable manual S 154 56.0994 90 -0.66 58
TV.SF01.EHZ. 2021-06-01T17:09:37.60 0.3 undecidable manual S 162 55.5999 90 -0.63 59
IV.ARCI.HHZ. 2021-06-01T17:09:36.30 0.3 undecidable manual S 169 49.617 90 -0.31 66
IV.LMD.HHZ. 2021-06-01T17:09:36.54 0.1 undecidable manual P 18 91.7415 90 0.06 88
IV.PII.HHZ. 2021-06-01T17:09:35.04 0.3 undecidable manual P 306 82.3509 90 0.01 66
IV.SEI.HHZ. 2021-06-01T17:09:35.60 0.6 undecidable manual P 0 84.7485 90 0.2 43
IV.ATVO.HHZ. 2021-06-01T17:09:35.82 0.1 undecidable manual P 83 85.248 90 0.33 84
IV.SFI.EHZ. 2021-06-01T17:09:34.29 0.3 undecidable manual P 30 78.7656 90 -0.18 64
IV.PARC.HHZ. 2021-06-01T17:09:34.88 0.1 undecidable manual P 60 81.3519 90 0 89
IV.TRIF.CHZ. 2021-06-01T17:09:34.50 0.3 undecidable manual S 242 41.625 90 0.02 72
IV.MOCL.EHZ. 2021-06-01T17:09:34.80 0.3 undecidable manual P 350 80.5638 90 0.05 67
IV.BADI.EHZ. 2021-06-01T17:09:34.44 0.6 undecidable manual P 71 75.5688 90 0.46 42
IV.CASP.HHZ. 2021-06-01T17:09:33.87 0.1 positive manual P 216 68.2761 90 1.01 69
IV.SSP9.EHZ. 2021-06-01T17:09:33.28 0.6 undecidable manual P 63 69.8745 90 0.17 45
IV.MGAB.HHZ. 2021-06-01T17:09:33.71 0.3 undecidable manual P 124 74.1702 90 -0.05 67
TV.SF14.HHN. 2021-06-01T17:09:32.35 0.1 negative manual P 161 62.8926 90 0.31 89
IV.ASQU.HHZ. 2021-06-01T17:09:32.26 0.3 undecidable manual P 32 66.0894 90 -0.26 65
IV.SACS.HHZ. 2021-06-01T17:09:32.88 0.1 undecidable manual P 137 66.378 90 0.31 88
IV.MCIV.CHE. 2021-06-01T17:09:32.23 0.1 negative manual P 155 62.3931 90 0.27 89
TV.SF01.EHZ. 2021-06-01T17:09:31.16 0.1 negative manual P 162 55.5999 90 0.25 91
IV.CRE.HHZ. 2021-06-01T17:09:31.41 0.3 undecidable manual P 53 60.1953 90 -0.2 66
TV.SF03.EHN. 2021-06-01T17:09:31.92 0.1 undecidable manual P 154 60.2952 90 0.29 89
TV.SF04.EHZ. 2021-06-01T17:09:31.24 0.1 negative manual P 154 56.0994 90 0.25 91
IV.RUFI.EHZ. 2021-06-01T17:09:31.52 0.1 undecidable manual P 11 61.9935 90 -0.37 85
TV.SF11.HHZ. 2021-06-01T17:09:30.82 0.1 undecidable manual P 151 53.6019 90 0.23 92
IV.ARCI.HHZ. 2021-06-01T17:09:30.05 0.1 undecidable manual P 169 49.617 90 0.07 95
IV.RIBO.EHZ. 2021-06-01T17:09:29.84 0.3 undecidable manual P 214 45.4212 90 0.5 66
IV.FROS.CHZ. 2021-06-01T17:09:28.30 0.1 undecidable manual S 241 18.5703 92 -0.02 98
IV.TRIF.CHZ. 2021-06-01T17:09:28.95 0.1 undecidable manual P 242 41.625 90 0.2 94
IV.FROS.CHZ. 2021-06-01T17:09:25.31 0.1 positive manual P 241 18.5703 92 0.11 100
IV.CSNT.HHZ. 2021-06-01T17:09:24.68 0.1 negative manual P 345 20.9679 92 -0.89 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.8 0.00458545 0.128 AML other m 2021-06-01T17:09:27.74
IV.CSNT.HHE. ML:2.8 0.004165022000000001 1.7184 AML other m 2021-06-01T17:09:27.90
IV.FROS.CHE. ML:3.0 0.00818 0.16 AML other m 2021-06-01T17:09:28.57
IV.FROS.CHN. ML:2.8 0.0052994235 0.1664 AML other m 2021-06-01T17:09:29.09
IV.TRIF.CHE. ML:2.2 0.0005219388000000001 0.1024 AML other m 2021-06-01T17:09:35.90
IV.TRIF.CHN. ML:2.1 0.00045207810000000005 0.1408 AML other m 2021-06-01T17:09:36.87
IV.ARCI.HHN. ML:1.9 0.00023 0.18 AML other m 2021-06-01T17:09:37.88
TV.SF01.EHN. ML:2.6 0.0009085398500000001 0.1152 AML other m 2021-06-01T17:09:37.91
TV.SF01.EHE. ML:2.4 0.0005708149999999999 0.1152 AML other m 2021-06-01T17:09:37.86
IV.ARCI.HNN. ML:2.2 0.00044950000000000003 0.16 AML other m 2021-06-01T17:09:37.88
IV.ARCI.HHE. ML:2.1 0.0003266034 0.1792 AML other m 2021-06-01T17:09:38.43
IV.ARCI.HNE. ML:2.2 0.00040493685 0.1408 AML other m 2021-06-01T17:09:38.36
IV.RUFI.EHN. ML:1.9 0.00015938444999999998 1.552 AML other m 2021-06-01T17:09:40.00
IV.CRE.HHE. ML:2.4 0.000579 0.3 AML other m 2021-06-01T17:09:40.21
TV.SF04.EHN. ML:2.5 0.0007688228 0.192 AML other m 2021-06-01T17:09:40.29
IV.RUFI.EHE. ML:2.0 0.0001985 0.34 AML other m 2021-06-01T17:09:40.61
TV.SF04.EHE. ML:2.6 0.0010112399 0.1408 AML other m 2021-06-01T17:09:40.93
IV.CRE.HHN. ML:2.3 0.0004500835 1.6928 AML other m 2021-06-01T17:09:41.89
IV.ASQU.HHE. ML:2.1 0.0002035 0.38 AML other m 2021-06-01T17:09:41.37
IV.SSP9.EHE. ML:2.2 0.0002945 0.44 AML other m 2021-06-01T17:09:43.65
IV.ASQU.HHN. ML:1.8 0.00011149999999999999 1.52 AML other m 2021-06-01T17:09:44.87
IV.CASP.HHN. ML:1.7 0.00007989288 1.8464 AML other m 2021-06-01T17:09:45.08
IV.SACS.HHN. ML:1.6 0.0000748 0.28 AML other m 2021-06-01T17:09:45.24
IV.CASP.HHE. ML:1.7 0.000091098605 0.3072 AML other m 2021-06-01T17:09:45.11
IV.BADI.EHE. ML:2.1 0.0001779721 0.2048 AML other m 2021-06-01T17:09:45.49
IV.BADI.EHN. ML:2.0 0.000157 0.36 AML other m 2021-06-01T17:09:45.60
IV.PARC.HHN. ML:2.1 0.0001762638 0.2688 AML other m 2021-06-01T17:09:45.91
IV.MOCL.EHE. ML:2.6 0.00054703575 1.6416 AML other m 2021-06-01T17:09:45.92
IV.PARC.HHE. ML:2.0 0.00013700000000000002 0.32 AML other m 2021-06-01T17:09:46.02
IV.SACS.HHE. ML:1.6 0.0000816 0.92 AML other m 2021-06-01T17:09:46.61
IV.MOCL.EHN. ML:2.6 0.000504 0.38 AML other m 2021-06-01T17:09:46.56
IV.SACS.HNN. ML:1.8 0.00011718448500000001 1.2704 AML other m 2021-06-01T17:09:46.71
IV.CASP.HNE. ML:1.9 0.0001413032 1.6544 AML other m 2021-06-01T17:09:47.87
IV.SFI.EHE. ML:1.9 0.0001085 0.36 AML other m 2021-06-01T17:09:47.25
IV.SFI.EHN. ML:1.7 0.00007537644000000001 0.448 AML other m 2021-06-01T17:09:47.53
IV.SEI.HHE. ML:2.5 0.000441 0.22 AML other m 2021-06-01T17:09:47.75
IV.SSP9.EHN. ML:2.2 0.0002394175 0.5376 AML other m 2021-06-01T17:09:47.63
IV.MGAB.HHN. ML:2.0 0.000163 1.84 AML other m 2021-06-01T17:09:47.95
IV.MGAB.HNN. ML:2.0 0.00015643194999999998 0.2176 AML other m 2021-06-01T17:09:48.14
IV.PII.HHN. ML:2.1 0.0001663636 0.32 AML other m 2021-06-01T17:09:48.11
IV.SEI.HHN. ML:2.8 0.000819 0.34 AML other m 2021-06-01T17:09:48.39
IV.MGAB.HHE. ML:2.0 0.00014149745000000002 0.1792 AML other m 2021-06-01T17:09:48.49
IV.MGAB.HNE. ML:2.0 0.000139763055 0.1792 AML other m 2021-06-01T17:09:48.49
IV.SFI.HNE. ML:2.0 0.00013415280000000001 0.6784 AML other m 2021-06-01T17:09:48.28
IV.PII.HHE. ML:1.9 0.000094235665 0.384 AML other m 2021-06-01T17:09:49.32
IV.SFI.HNN. ML:2.0 0.00012850465 0.7936 AML other m 2021-06-01T17:09:50.15
IV.ATVO.HHN. ML:2.1 0.0001545 0.42 AML other m 2021-06-01T17:09:50.55
IV.ATVO.HHE. ML:2.3 0.0002375 0.3 AML other m 2021-06-01T17:09:51.58
IV.LMD.HHE. ML:1.8 0.00007442127 0.32 AML other m 2021-06-01T17:09:51.78
IV.LMD.HHN. ML:2.0 0.0001088 0.24 AML other m 2021-06-01T17:09:51.76
IV.ASSB.HHE. ML:1.7 0.000045166119999999996 1.5776 AML other m 2021-06-01T17:09:55.99
IV.ASSB.HHN. ML:1.7 0.000044054610000000004 0.1792 AML other m 2021-06-01T17:09:56.65
IV.CELB.HHN. ML:1.7 0.00004290301 1.744 AML other m 2021-06-01T17:09:57.10
IV.FOSV.EHE. ML:1.7 0.0000434 0.54 AML other m 2021-06-01T17:10:01.44
IV.FOSV.EHN. ML:1.9 0.000058250000000000006 0.44 AML other m 2021-06-01T17:10:01.74
GU.GSCL.HHN. ML:1.7 0.00003203246 0.5376 AML other m 2021-06-01T17:10:02.37
GU.GSCL.HHE. ML:1.8 0.00003845 0.58 AML other m 2021-06-01T17:10:04.42
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
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Waveforms Seismic signals in miniseed + resp format Download