Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 29-05-2021 and time 08:44:22 (Italy) in region 5 km W Greve in Chianti (FI)

A magnitude ML 1.8 earthquake occured in region: 5 km W Greve in Chianti (FI), on

  • 29-05-2021 06:44:22 (UTC)
  • 29-05-2021 08:44:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5750, 11.2570 at 9 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
Greve in Chianti FI 5 13862 13862
Tavarnelle Val di Pesa FI 7 7800 21662
Barberino Val d'Elsa FI 8 4386 26048
San Casciano in Val di Pesa FI 11 17062 43110
Castellina in Chianti SI 12 2859 45969
Impruneta FI 12 14615 60584
Radda in Chianti SI 14 1613 62197
Poggibonsi SI 15 29196 91393
Montespertoli FI 17 13537 104930
Certaldo FI 18 16121 121051
Figline e Incisa Valdarno FI 19 23505 144556
Gaiole in Chianti SI 19 2758 147314
Cavriglia AR 20 9614 156928

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Scandicci (50609 inhabitants)
22 Km S of Firenze (382808 inhabitants)
29 Km N of Siena (53903 inhabitants)
36 Km SE of Prato (191150 inhabitants)
48 Km SE of Pistoia (90315 inhabitants)
52 Km W of Arezzo (99543 inhabitants)
68 Km E of Lucca (89046 inhabitants)
71 Km E of Pisa (89158 inhabitants)
76 Km E of Livorno (159219 inhabitants)
87 Km E of Viareggio (62467 inhabitants)
91 Km N of Grosseto (82087 inhabitants)
94 Km SW of Faenza (58541 inhabitants)
94 Km SW of Imola (69797 inhabitants)
96 Km SW of Forlì (117913 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 2021-05-29
06:44:22		 43.5753 11.2573 9 2021-12-29
11:12:02		 Bollettino Sismico Italiano INGV 90690471
Reviewed
Rev100 		ML 1.8 2021-05-29
06:44:22		 43.5765 11.2488 7 2021-05-29
06:54:09		 Sala Sismica INGV-Roma 90596841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-29 06:44:22 ± 0.1
Latitude 43.5753 ± 0.0036
Longitude 11.2573 ± 0.0074
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90690471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 563
Semi-minor axis of confidence ellipse (meter) 181
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.83457
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 39
Type of magnitude ML
Reference to an origin 90690471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-12 12:42:52

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 29
Type of magnitude ML
Reference to an origin 90596841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-29 06:54:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRAC.EHZ. 2021-05-29T06:45:55.31 3.0 undecidable manual Pg 17.99 0
GU.ENR.HHZ. 2021-05-29T06:45:54.17 3.0 undecidable manual Sg 10.15 0
IV.CAPR.HNZ. 2021-05-29T06:45:37.17 3.0 undecidable manual Sg 7.96 0
SL.KOGS.BHZ. 2021-05-29T06:45:36.37 3.0 negative manual Pn 5.42 0
IV.ZONE.HHZ. 2021-05-29T06:45:30.96 3.0 undecidable manual Sn 0.17 0
IT.MCLF.HNZ. 2021-05-29T06:45:20.09 3.0 positive manual Pg 8.71 0
IV.VENT.EHZ. 2021-05-29T06:45:12.75 3.0 positive manual Pn 0 0
IV.AGLI.HHZ. 2021-05-29T06:45:09.63 3.0 undecidable manual Pn 0.86 0
ST.RONC.EHZ. 2021-05-29T06:45:09.14 3.0 negative manual Pg 6.93 0
IV.LMD.HHZ. 2021-05-29T06:44:43.11 0.6 undecidable manual S 33 66.2781 50 0.25 44
IV.CAFI.HHZ. 2021-05-29T06:44:41.52 0.6 undecidable manual S 115 63.2922 50 -0.53 41
IV.CRE.HHZ. 2021-05-29T06:44:40.01 0.6 undecidable manual S 85 55.9995 50 -0.09 46
IV.PII.HHZ. 2021-05-29T06:44:40.61 0.6 undecidable manual S 286 60.9945 50 -0.83 37
IV.TRIF.CHE. 2021-05-29T06:44:40.66 0.6 undecidable manual S 209 58.5969 50 -0.13 46
IV.CPGN.EHZ. 2021-05-29T06:44:39.00 0.6 undecidable manual P 73 88.8444 50 1.41 26
IV.SEI.HHZ. 2021-05-29T06:44:39.69 0.6 undecidable manual S 9 53.7018 50 0.19 46
IV.CASP.HHZ. 2021-05-29T06:44:39.07 0.3 undecidable manual P 200 92.6406 50 0.9 50
IV.MOCL.EHZ. 2021-05-29T06:44:38.08 0.6 undecidable manual S 353 48.0186 50 0.1 47
IV.ASQU.HHZ. 2021-05-29T06:44:38.10 0.6 undecidable manual S 60 49.2174 50 -0.2 46
IV.MPPT.EHZ. 2021-05-29T06:44:36.90 0.6 undecidable manual S 343 44.4222 50 -0.13 47
IV.BDI.HHZ. 2021-05-29T06:44:36.23 0.3 undecidable manual P 316 75.6687 50 0.67 57
IV.ARCI.HHZ. 2021-05-29T06:44:36.92 0.3 undecidable manual P 168 82.1511 50 0.36 62
IV.PARC.HHZ. 2021-05-29T06:44:36.61 0.3 undecidable manual P 84 79.2651 50 0.51 61
IV.RIBO.EHE.01 2021-05-29T06:44:35.66 0.3 undecidable manual P 194 71.5728 50 0.74 56
IV.FROS.CHN. 2021-05-29T06:44:35.60 0.6 undecidable manual S 191 41.3253 50 -0.6 42
IV.LMD.HHZ. 2021-05-29T06:44:34.41 0.3 undecidable manual P 33 66.2781 50 0.3 65
IV.RUFI.EHZ. 2021-05-29T06:44:34.00 0.6 undecidable manual S 35 35.4423 50 -0.63 42
IV.FNVD.HHZ. 2021-05-29T06:44:34.57 0.1 undecidable manual P 351 66.5778 50 0.41 85
IV.PII.HHZ. 2021-05-29T06:44:33.32 0.1 undecidable manual P 286 60.9945 50 0.03 93
IV.CRMI.HHZ. 2021-05-29T06:44:33.80 0.6 undecidable manual S 318 33.0447 50 -0.19 47
IV.CAFI.HHZ. 2021-05-29T06:44:33.76 0.3 undecidable manual P 115 63.2922 50 0.11 68
IV.TRIF.CHE. 2021-05-29T06:44:32.68 0.1 undecidable manual P 209 58.5969 50 -0.24 89
IV.MAGO.CHZ. 2021-05-29T06:44:32.84 0.3 undecidable manual P 235 58.7967 50 -0.11 69
IV.SEI.HHZ. 2021-05-29T06:44:32.33 0.1 undecidable manual P 9 53.7018 50 0.16 92
IV.CRE.HHZ. 2021-05-29T06:44:32.40 0.3 undecidable manual P 85 55.9995 50 -0.12 69
IV.SFI.EHZ. 2021-05-29T06:44:32.92 0.3 undecidable manual P 52 59.6958 50 -0.18 68
IV.MOCL.EHZ. 2021-05-29T06:44:31.11 0.3 undecidable manual P 353 48.0186 50 -0.19 69
IV.ASQU.HHZ. 2021-05-29T06:44:31.29 0.1 undecidable manual P 60 49.2174 50 -0.19 92
IT.FIE.HGZ. 2021-05-29T06:44:31.46 0.6 undecidable manual S 7 25.8519 108 -0.17 48
IV.MPPT.EHZ. 2021-05-29T06:44:30.61 0.1 undecidable manual P 343 44.4222 50 -0.14 94
IV.FROS.CHN. 2021-05-29T06:44:30.10 0.1 undecidable manual P 191 41.3253 50 -0.17 94
IV.RUFI.EHZ. 2021-05-29T06:44:28.99 0.1 positive manual P 35 35.4423 50 -0.37 91
IV.CRMI.HHZ. 2021-05-29T06:44:28.98 0.1 undecidable manual P 318 33.0447 50 -0.01 98
IT.FIE.HGZ. 2021-05-29T06:44:27.52 0.3 undecidable manual P 7 25.8519 108 -0.11 73
IV.CSNT.HHZ. 2021-05-29T06:44:26.90 0.6 undecidable manual S 167 11.6772 127 -0.29 48
IV.CSNT.HHZ. 2021-05-29T06:44:24.97 0.1 positive manual P 167 11.6772 127 -0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:2.3 0.0023329735 0.1792 AML other m 2021-05-29T06:44:27.33
IV.CSNT.HHN. ML:2.4 0.0028650000000000004 0.14 AML other m 2021-05-29T06:44:27.45
IV.RUFI.EHE. ML:2.0 0.000418 0.16 AML other m 2021-05-29T06:44:34.62
IV.RUFI.EHN. ML:1.8 0.0002830325 0.1376 AML other m 2021-05-29T06:44:34.91
IV.CRMI.HHE. ML:1.2 0.00006658237 0.1184 AML other m 2021-05-29T06:44:35.11
IV.CRMI.HHN. ML:1.4 0.00010698115 0.1408 AML other m 2021-05-29T06:44:35.95
IV.MPPT.EHE. ML:2.0 0.0002715 0.5 AML other m 2021-05-29T06:44:37.21
IV.MPPT.EHN. ML:1.8 0.000188 0.42 AML other m 2021-05-29T06:44:37.45
IV.ASQU.HHN. ML:1.8 0.00015341185 0.3008 AML other m 2021-05-29T06:44:38.39
IV.ASQU.HHE. ML:2.0 0.00027249999999999996 0.48 AML other m 2021-05-29T06:44:38.63
IV.MOCL.EHE. ML:2.4 0.0007740000000000001 0.16 AML other m 2021-05-29T06:44:38.68
IV.MOCL.EHN. ML:2.3 0.0006027995500000001 0.2592 AML other m 2021-05-29T06:44:39.22
IV.CRE.HHE. ML:2.0 0.00020400000000000003 0.3 AML other m 2021-05-29T06:44:40.45
IV.SEI.HHE. ML:2.3 0.0004992065 0.16 AML other m 2021-05-29T06:44:40.64
IV.SEI.HHN. ML:2.5 0.00079855775 0.16 AML other m 2021-05-29T06:44:41.07
IV.SFI.HNE. ML:2.0 0.00019475375 0.3104 AML other m 2021-05-29T06:44:41.74
IV.SFI.EHE. ML:2.0 0.000185 0.3 AML other m 2021-05-29T06:44:41.60
IV.CAFI.HHN. ML:1.5 0.000054449999999999995 1.08 AML other m 2021-05-29T06:44:41.72
IV.CRE.HHN. ML:2.0 0.0002345881 0.2208 AML other m 2021-05-29T06:44:41.74
IV.CAFI.HHE. ML:1.4 0.000044300000000000006 0.18 AML other m 2021-05-29T06:44:41.92
IV.SFI.EHN. ML:1.7 0.000115669255 0.2208 AML other m 2021-05-29T06:44:41.86
IV.PII.HHE. ML:1.9 0.000146 1.06 AML other m 2021-05-29T06:44:43.28
IV.PII.HHN. ML:1.9 0.0001521806 0.2592 AML other m 2021-05-29T06:44:43.69
IV.LMD.HHN. ML:2.0 0.0001835 0.12 AML other m 2021-05-29T06:44:43.85
IV.LMD.HHE. ML:2.0 0.00019342399999999998 0.1024 AML other m 2021-05-29T06:44:44.38
IV.FNVD.HHE. ML:1.9 0.00013000000000000002 0.46 AML other m 2021-05-29T06:44:46.93
IV.PARC.HHN. ML:1.6 0.000057866845 0.1792 AML other m 2021-05-29T06:44:47.47
IV.ARCI.HNE. ML:1.5 0.000044424530000000003 0.448 AML other m 2021-05-29T06:44:47.75
IV.FNVD.HHN. ML:1.9 0.0001445 0.32 AML other m 2021-05-29T06:44:47.96
IV.BDI.HHE. ML:1.5 0.00004730621 0.24 AML other m 2021-05-29T06:44:48.49
IV.PARC.HHE. ML:1.6 0.000052237574999999994 0.2816 AML other m 2021-05-29T06:44:48.87
IV.ARCI.HHE. ML:1.5 0.000047 0.46 AML other m 2021-05-29T06:44:49.14
IV.ARCI.HNN. ML:1.6 0.00005030977 0.2272 AML other m 2021-05-29T06:44:49.10
IV.ARCI.HHN. ML:1.4 0.000027950000000000002 0.2 AML other m 2021-05-29T06:44:49.12
IV.BDI.HHN. ML:1.6 0.00006175 0.38 AML other m 2021-05-29T06:44:50.05
IV.CASP.HHN. ML:1.1 0.0000168292 0.2976 AML other m 2021-05-29T06:44:53.30
IV.CASP.HHE. ML:1.2 0.00002215 0.28 AML other m 2021-05-29T06:44:54.60
IV.CPGN.EHE. ML:1.5 0.0000370956465 0.4608 AML other m 2021-05-29T06:44:56.76
IV.CPGN.EHN. ML:1.6 0.00004456785 1.44 AML other m 2021-05-29T06:44:58.84
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