Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 21-05-2021 and time 21:49:26 (Italy) in region 1 km E Montieri (GR)

A magnitude ML 2.1 earthquake occured in region: 1 km E Montieri (GR), on

  • 21-05-2021 19:49:26 (UTC)
  • 21-05-2021 21:49:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1340, 11.0330 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
Montieri GR 1 1204 1204
Chiusdino SI 5 1903 3107
Monticiano SI 12 1571 4678
Castelnuovo di Val di Cecina PI 13 2231 6909
Monterotondo Marittimo GR 14 1371 8280
Radicondoli SI 14 914 9194
Massa Marittima GR 15 8375 17569
Roccastrada GR 18 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SW of Siena (53903 inhabitants)
42 Km N of Grosseto (82087 inhabitants)
71 Km S of Scandicci (50609 inhabitants)
73 Km S of Firenze (382808 inhabitants)
75 Km SE of Livorno (159219 inhabitants)
78 Km W of Arezzo (99543 inhabitants)
82 Km SE of Pisa (89158 inhabitants)
83 Km S of Prato (191150 inhabitants)
90 Km S of Pistoia (90315 inhabitants)
90 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 2021-05-21
19:49:26		 43.134 11.0327 10 2021-12-29
11:12:32		 Bollettino Sismico Italiano INGV 95737271
Reviewed
Rev100 		ML 2.1 2021-05-21
19:49:27		 43.1347 11.0613 10 2021-05-21
20:05:16		 Sala Sismica INGV-Roma 90348001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-21 19:49:26 ± 0.09
Latitude 43.1340 ± 0.0045
Longitude 11.0327 ± 0.0074
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 95737271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 536
Semi-minor axis of confidence ellipse (meter) 524
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 264
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 52
Number of defining phases 31
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.82378
Number of stations at which the event was observed 36
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 23
Type of magnitude ML
Reference to an origin 95737271
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-22 11:08:16

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 90348001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-21 20:05:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VULT.HHZ. 2021-05-21T19:51:19.34 3.0 undecidable manual Sg 11.39 0
ST.CARE.EHE. 2021-05-21T19:50:58.40 3.0 undecidable manual Sn 0.72 0
IV.TREG.EHZ. 2021-05-21T19:50:45.00 3.0 undecidable manual Sg 10.05 0
IV.PIGN.HNZ. 2021-05-21T19:50:42.07 3.0 undecidable manual Sn -1.32 0
ST.CARE.EHE. 2021-05-21T19:50:26.08 3.0 positive manual Pg 8.85 0
IX.MNT3.HHN.02 2021-05-21T19:50:24.65 3.0 undecidable manual Pn 5.71 0
IV.AGLI.HHZ. 2021-05-21T19:50:16.15 3.0 undecidable manual Pg 10.98 0
IV.SARZ.HHN. 2021-05-21T19:50:13.14 3.0 negative manual Pg 7.95 0
GU.GSCL.HHZ. 2021-05-21T19:50:12.13 3.0 undecidable manual S 3.17 0
IV.VENT.EHZ. 2021-05-21T19:50:10.98 3.0 negative manual Pn 2.72 0
IV.COR1.EHN. 2021-05-21T19:50:05.94 3.0 undecidable manual S -1.44 0
IV.MTRZ.HHE. 2021-05-21T19:50:02.83 3.0 undecidable manual S -2.52 0
IV.MPAG.EHN. 2021-05-21T19:50:02.22 3.0 undecidable manual S -1.3 0
IV.TOLF.HHE. 2021-05-21T19:50:01.51 3.0 undecidable manual S -0.23 0
IV.ATFO.HHZ. 2021-05-21T19:50:00.74 3.0 undecidable manual S 2.87 0
IV.SAP2.EHN. 2021-05-21T19:49:56.40 3.0 positive manual P 5.11 0
RD.PGF.BHZ. 2021-05-21T19:49:55.34 3.0 positive manual Pn 0.03 0
IV.MURB.HHZ. 2021-05-21T19:49:54.59 3.0 undecidable manual S -1.81 0
IV.TOLF.HHZ. 2021-05-21T19:49:52.76 3.0 undecidable manual P 0
IV.RUFI.EHZ. 2021-05-21T19:49:52.63 0.3 undecidable manual S 26 87.0462 50 0.09 65
IV.FIR.HHE. 2021-05-21T19:49:50.04 3.0 undecidable manual S -1.09 0
IV.CELB.HHN. 2021-05-21T19:49:50.56 0.3 undecidable manual S 238 79.365 50 0.05 66
TV.SF03.EHZ. 2021-05-21T19:49:46.14 0.3 undecidable manual S 125 64.491 50 -0.4 63
IV.MCIV.CHN. 2021-05-21T19:49:46.32 0.3 undecidable manual S 127 65.49 50 -0.48 62
TV.SF04.EHZ. 2021-05-21T19:49:45.05 0.3 undecidable manual S 123 60.7947 50 -0.49 62
TV.SF14.HHE. 2021-05-21T19:49:45.78 0.3 undecidable manual S 131 63.2922 50 -0.42 63
TV.SF11.HHZ. 2021-05-21T19:49:44.92 0.3 undecidable manual S 119 60.0954 50 -0.45 63
TV.SF01.EHZ. 2021-05-21T19:49:44.05 0.3 undecidable manual S 130 55.9995 50 -0.21 67
IV.MPPT.EHZ. 2021-05-21T19:49:42.91 1.0 undecidable manual P 3 91.4418 50 0.61 19
IV.RUFI.EHZ. 2021-05-21T19:49:41.47 0.6 undecidable manual P 26 87.0462 50 -0.14 43
IV.ARCI.HHZ. 2021-05-21T19:49:41.97 0.3 undecidable manual S 131 47.619 50 -0.07 70
IV.CAFI.HHZ. 2021-05-21T19:49:40.46 0.6 undecidable manual P 74 78.4659 50 0.16 43
IV.CSNT.HHZ. 2021-05-21T19:49:40.33 0.3 undecidable manual S 29 43.0236 50 -0.46 65
IV.CELB.HHN. 2021-05-21T19:49:40.44 0.6 undecidable manual P 238 79.365 50 0 44
IV.CRMI.HNN. 2021-05-21T19:49:39.76 0.6 undecidable manual P 357 73.4709 50 0.23 43
IV.PII.HHZ. 2021-05-21T19:49:39.57 0.3 undecidable manual P 328 76.9674 50 -0.49 60
TV.SF14.HHE. 2021-05-21T19:49:38.79 0.1 undecidable manual P 131 63.2922 50 0.84 72
TV.SF03.EHZ. 2021-05-21T19:49:38.68 0.3 undecidable manual P 125 64.491 50 0.54 61
IV.MCIV.CHN. 2021-05-21T19:49:38.86 0.6 undecidable manual P 127 65.49 50 0.57 40
TV.SF04.EHZ. 2021-05-21T19:49:37.89 0.6 undecidable manual P 123 60.7947 50 0.33 43
TV.SF01.EHZ. 2021-05-21T19:49:37.43 0.1 undecidable manual P 130 55.9995 50 0.6 80
IV.FIR.HHN. 2021-05-21T19:49:37.85 3.0 undecidable manual P -1.99 0
TV.SF11.HHZ. 2021-05-21T19:49:37.40 0.6 undecidable manual P 119 60.0954 50 -0.07 46
IV.ARCI.HHZ. 2021-05-21T19:49:36.15 0.3 undecidable manual P 131 47.619 50 0.6 61
IV.CSNT.HHZ. 2021-05-21T19:49:35.04 0.1 positive manual P 29 43.0236 50 0.22 91
IV.RIBO.EHZ. 2021-05-21T19:49:34.34 0.3 undecidable manual S 177 20.5683 116 -0.29 70
IV.MAGO.CHZ. 2021-05-21T19:49:33.29 0.3 undecidable manual P 297 34.0437 50 -0.15 70
IV.FROS.CHZ. 2021-05-21T19:49:32.09 0.3 undecidable manual S 50 13.0758 128 -0.33 70
IV.TRIF.CHE. 2021-05-21T19:49:31.18 0.3 undecidable manual S 259 10.7781 134 -0.64 65
IV.RIBO.EHZ. 2021-05-21T19:49:31.56 0.1 positive manual P 177 20.5683 116 0.29 93
IV.FROS.CHZ. 2021-05-21T19:49:30.20 0.1 positive manual P 50 13.0758 128 0.21 96
IV.TRIF.CHE. 2021-05-21T19:49:29.68 0.1 negative manual P 259 10.7781 134 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:2.4 0.003040183 0.1792 AML other m 2021-05-21T19:49:32.20
IV.FROS.CHN. ML:2.4 0.0027346482999999998 0.1792 AML other m 2021-05-21T19:49:32.74
IV.MAGO.CHN. ML:0.0 0.0009607904 0.1408 AML other m 2021-05-21T19:49:37.30
IV.MAGO.CHE. ML:0.0 0.0006813683999999999 0.1024 AML other m 2021-05-21T19:49:37.61
IV.CSNT.HHN. ML:2.2 0.0005164999999999999 0.2 AML other m 2021-05-21T19:49:40.52
IV.CSNT.HHE. ML:1.9 0.0002286074 0.1664 AML other m 2021-05-21T19:49:40.75
IV.ARCI.HHE. ML:1.8 0.0001954771 0.1664 AML other m 2021-05-21T19:49:42.39
IV.ARCI.HHN. ML:1.7 0.00015099999999999998 1.78 AML other m 2021-05-21T19:49:42.98
TV.SF04.EHN. ML:2.2 0.00035826775 0.1792 AML other m 2021-05-21T19:49:46.03
TV.SF01.EHN. ML:2.1 0.00026900000000000003 1.66 AML other m 2021-05-21T19:49:46.06
IV.MCIV.CHE. ML:1.8 0.00010675 0.24 AML other m 2021-05-21T19:49:46.71
TV.SF01.EHE. ML:2.1 0.00029200000000000005 0.38 AML other m 2021-05-21T19:49:47.05
IV.MCIV.CHN. ML:1.6 0.00007947546499999999 0.2816 AML other m 2021-05-21T19:49:46.56
TV.SF04.EHE. ML:2.2 0.000288 0.22 AML other m 2021-05-21T19:49:48.50
IV.CELB.HHE. ML:2.5 0.00046900895 0.064 AML other m 2021-05-21T19:49:51.85
IV.CELB.HHN. ML:2.3 0.0002905131 0.0896 AML other m 2021-05-21T19:49:51.53
IV.RUFI.EHE. ML:1.9 0.00009545 0.24 AML other m 2021-05-21T19:49:53.73
IV.RUFI.EHN. ML:1.8 0.000077 1.52 AML other m 2021-05-21T19:49:55.82
IV.RIBO.EHE.01 ML:2.7 0.003329233 0.1792 AML other m 2021-05-21T19:49:34.84
IV.ARCI.HNE. ML:1.9 0.00021210971 0.1664 AML other m 2021-05-21T19:49:42.39
IV.ARCI.HNN. ML:2.0 0.00028175904 0.1792 AML other m 2021-05-21T19:49:42.97
IV.PII.HHN. ML:1.9 0.000117418615 0.2944 AML other m 2021-05-21T19:49:49.93
IV.PII.HHE. ML:1.7 0.00006793437850000001 0.2816 AML other m 2021-05-21T19:49:50.00
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