Earthquake with magnitude of ML 2.0 on date 24-05-2021 and time 07:47:56 (Italy) in region 5 km W Greve in Chianti (FI)

A magnitude ML 2.0 earthquake occured in region: 5 km W Greve in Chianti (FI), on

  • 24-05-2021 05:47:56 (UTC)
  • 24-05-2021 07:47:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5890, 11.2530 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.

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 9 17062 43110
Impruneta FI 11 14615 57725
Castellina in Chianti SI 13 2859 60584
Radda in Chianti SI 15 1613 62197
Montespertoli FI 16 13537 75734
Poggibonsi SI 16 29196 104930
Certaldo FI 18 16121 121051
Figline e Incisa Valdarno FI 18 23505 144556
Bagno a Ripoli FI 19 25611 170167
Gaiole in Chianti SI 20 2758 172925
Scandicci FI 20 50609 223534

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SE of Scandicci (50609 inhabitants)
20 Km S of Firenze (382808 inhabitants)
31 Km N of Siena (53903 inhabitants)
35 Km SE of Prato (191150 inhabitants)
47 Km SE of Pistoia (90315 inhabitants)
53 Km W of Arezzo (99543 inhabitants)
67 Km E of Lucca (89046 inhabitants)
70 Km E of Pisa (89158 inhabitants)
76 Km E of Livorno (159219 inhabitants)
86 Km E of Viareggio (62467 inhabitants)
93 Km SW of Faenza (58541 inhabitants)
93 Km SW of Imola (69797 inhabitants)
93 Km N of Grosseto (82087 inhabitants)
95 Km SW of Forlì (117913 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.0 2021-05-24
05:47:56
43.589 11.2533 9 2021-12-29
11:12:10
Bollettino Sismico Italiano INGV 92702231
Reviewed
Rev100
ML 2.1 2021-05-24
05:47:56
43.5892 11.258 8 2021-05-24
05:55:48
Sala Sismica INGV-Roma 90441701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-24 05:47:56 ± 0.07
Latitude 43.5890 ± 0.0027
Longitude 11.2533 ± 0.0050
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 92702231

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 305
Semi-minor axis of confidence ellipse (meter) 233
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 91
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.11871
Epicentral distance of station farthest from the epicenter (degree) 1.10976
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 90441701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-24 05:55:48

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 47
Type of magnitude ML
Reference to an origin 92702231
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-13 08:28:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.EQUI.HHZ. 2021-05-24T05:48:28.05 0.6 undecidable manual S 306 0.9803 50 -0.14 42
IV.VISG.HHZ. 2021-05-24T05:48:18.01 0.6 undecidable manual S 12 0.6133 50 0.69 39
IV.PLMA.HHZ. 2021-05-24T05:48:17.38 0.3 undecidable manual P 295 1.1098 50 0.53 55
IV.LMD.HHZ. 2021-05-24T05:48:16.85 0.6 undecidable manual S 34 0.5882 50 0.29 44
IV.TRIF.CHZ. 2021-05-24T05:48:15.10 0.3 undecidable manual S 208 0.5378 50 0.01 70
IV.MAGO.CHE. 2021-05-24T05:48:15.05 0.3 undecidable manual S 234 0.5351 50 0.05 70
IV.CAFI.HHZ. 2021-05-24T05:48:15.86 0.3 undecidable manual S 116 0.5792 50 -0.43 64
GU.EQUI.HHZ. 2021-05-24T05:48:14.72 1.0 undecidable manual P 306 0.9803 50 0.08 21
IV.SFI.EHZ. 2021-05-24T05:48:14.95 0.3 undecidable manual S 53 0.5324 50 0.04 70
IV.CRE.HHZ. 2021-05-24T05:48:14.09 0.6 undecidable manual S 86 0.5063 50 -0.05 47
IV.ATVO.HHZ. 2021-05-24T05:48:13.18 0.1 undecidable manual P 103 0.8616 50 0.57 77
IV.PIEI.HHZ. 2021-05-24T05:48:13.90 0.3 undecidable manual P 93 0.9299 50 0.12 63
IV.SEI.HHZ. 2021-05-24T05:48:13.34 0.3 undecidable manual S 9 0.4712 50 0.24 68
IV.ATPI.EHZ. 2021-05-24T05:48:12.71 0.3 undecidable manual P 99 0.8436 50 0.4 61
IV.ATMI.HHZ. 2021-05-24T05:48:11.58 0.6 undecidable manual P 109 0.7788 50 0.38 41
IV.ARCI.HHZ. 2021-05-24T05:48:11.00 0.3 undecidable manual P 168 0.7545 50 0.23 64
IV.ASQU.HHZ. 2021-05-24T05:48:11.96 0.3 undecidable manual S 62 0.4398 50 -0.2 69
IV.MPPT.EHZ. 2021-05-24T05:48:10.60 0.3 undecidable manual S 342 0.3867 50 0 73
IV.PARC.HHZ. 2021-05-24T05:48:10.51 0.6 undecidable manual P 85 0.7150 50 0.4 42
IV.FROS.CHZ. 2021-05-24T05:48:10.47 0.3 undecidable manual S 191 0.3858 50 -0.1 71
IV.SSP9.EHZ. 2021-05-24T05:48:09.45 0.3 undecidable manual P 91 0.6358 50 0.7 57
IV.VISG.HHZ. 2021-05-24T05:48:08.55 0.1 undecidable manual P 12 0.6133 50 0.18 89
IV.LMD.HHZ. 2021-05-24T05:48:07.96 0.3 undecidable manual P 34 0.5882 50 0.04 69
IV.RUFI.EHZ. 2021-05-24T05:48:07.65 0.3 undecidable manual S 37 0.3103 50 -0.68 62
IV.MAGO.CHE. 2021-05-24T05:48:07.28 0.3 undecidable manual P 234 0.5351 50 0.25 67
IV.CRMI.HHZ. 2021-05-24T05:48:07.44 0.6 undecidable manual S 316 0.2860 105 -0.1 48
IV.CAFI.HHZ. 2021-05-24T05:48:07.90 0.1 undecidable manual P 116 0.5792 50 0.13 91
IV.SFI.EHZ. 2021-05-24T05:48:06.63 0.3 undecidable manual P 53 0.5324 50 -0.35 66
IV.CRE.HHZ. 2021-05-24T05:48:06.45 0.3 undecidable manual P 86 0.5063 50 -0.08 70
IV.TRIF.CHZ. 2021-05-24T05:48:06.84 0.1 undecidable manual P 208 0.5378 50 -0.24 89
IV.PII.HHZ. 2021-05-24T05:48:06.73 0.1 positive manual P 284 0.5432 50 -0.43 86
IV.SEI.HHZ. 2021-05-24T05:48:05.82 0.3 undecidable manual P 9 0.4712 50 -0.11 70
IT.FIE.HGZ. 2021-05-24T05:48:05.21 0.6 undecidable manual S 8 0.2203 109 0.09 49
IV.ASQU.HHZ. 2021-05-24T05:48:04.98 0.1 undecidable manual P 62 0.4398 50 -0.41 88
IV.FIR.HHE. 2021-05-24T05:48:04.12 0.3 undecidable manual S 0 0.1853 113 0.25 72
IV.MPPT.EHZ. 2021-05-24T05:48:04.26 0.1 negative manual P 342 0.3867 50 -0.23 92
IV.FROS.CHZ. 2021-05-24T05:48:04.50 0.1 undecidable manual P 191 0.3858 50 0.03 96
IV.RUFI.EHZ. 2021-05-24T05:48:02.70 0.1 undecidable manual P 37 0.3103 50 -0.48 89
IV.CRMI.HHZ. 2021-05-24T05:48:02.86 0.1 undecidable manual P 316 0.2860 105 0.14 96
IV.CSNT.HHZ. 2021-05-24T05:48:01.42 0.3 undecidable manual S 167 0.1187 123 -0.17 74
IT.FIE.HGZ. 2021-05-24T05:48:01.17 0.1 undecidable manual P 8 0.2203 109 -0.15 97
IV.FIR.HHE. 2021-05-24T05:48:00.51 0.3 undecidable manual P 0 0.1853 113 -0.09 74
IV.CSNT.HHZ. 2021-05-24T05:47:59.19 0.1 undecidable manual P 167 0.1187 123 -0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHN. ML:2.0 0.0004215 0.26 AML other m 2021-05-24T05:48:07.59
IV.CRMI.HNN. ML:2.0 0.000407 0.48 AML other m 2021-05-24T05:48:07.60
IV.RUFI.EHE. ML:2.4 0.0010390000000000002 0.18 AML other m 2021-05-24T05:48:08.08
IV.RUFI.EHN. ML:2.4 0.001131 0.28 AML other m 2021-05-24T05:48:08.29
IV.CRMI.HHE. ML:1.9 0.00034899999999999997 0.36 AML other m 2021-05-24T05:48:08.28
IV.CRMI.HNE. ML:2.0 0.000497 0.38 AML other m 2021-05-24T05:48:08.29
IV.FROS.CHE. ML:2.6 0.0013599999999999999 0.26 AML other m 2021-05-24T05:48:10.65
IV.FROS.CHN. ML:2.5 0.0011149999999999999 0.26 AML other m 2021-05-24T05:48:11.40
IV.MPPT.EHE. ML:2.0 0.00033222030000000004 0.3776 AML other m 2021-05-24T05:48:10.83
IV.MPPT.EHN. ML:1.9 0.0002777188 0.2208 AML other m 2021-05-24T05:48:11.46
IV.ASQU.HHE. ML:2.2 0.000447 0.4 AML other m 2021-05-24T05:48:12.25
IV.ASQU.HHN. ML:2.2 0.00042500000000000003 0.22 AML other m 2021-05-24T05:48:12.87
IV.SEI.HHE. ML:2.5 0.000869 1.84 AML other m 2021-05-24T05:48:13.98
IV.SEI.HHN. ML:2.8 0.001685 0.14 AML other m 2021-05-24T05:48:14.48
IV.SFI.EHE. ML:2.3 0.0004465 1.64 AML other m 2021-05-24T05:48:15.98
IV.SFI.HNE. ML:2.4 0.0004885 1.64 AML other m 2021-05-24T05:48:15.98
IV.SFI.HNN. ML:2.1 0.000272714 0.3776 AML other m 2021-05-24T05:48:15.26
IV.SFI.EHN. ML:2.1 0.00025450835 0.3584 AML other m 2021-05-24T05:48:15.26
IV.TRIF.CHN. ML:2.3 0.00038669745 0.208 AML other m 2021-05-24T05:48:16.39
IV.TRIF.CHE. ML:2.2 0.0003125 1.84 AML other m 2021-05-24T05:48:15.95
IV.CAFI.HHN. ML:1.6 0.00008605 1.8 AML other m 2021-05-24T05:48:16.93
IV.PII.HHE. ML:2.1 0.00024 0.38 AML other m 2021-05-24T05:48:17.36
IV.LMD.HHE. ML:2.2 0.00028307515 0.0992 AML other m 2021-05-24T05:48:17.29
IV.LMD.HHN. ML:2.2 0.00032973895 0.1792 AML other m 2021-05-24T05:48:17.62
IV.CRE.HHN. ML:2.0 0.0002405 0.24 AML other m 2021-05-24T05:48:17.69
IV.VISG.HHE. ML:1.9 0.00012720395000000002 0.4416 AML other m 2021-05-24T05:48:20.31
IV.PII.HHN. ML:2.1 0.00028507585 0.4992 AML other m 2021-05-24T05:48:17.15
IV.VISG.HHN. ML:1.9 0.00012319230000000002 0.1408 AML other m 2021-05-24T05:48:19.03
IV.CAFI.HHE. ML:1.7 0.00009235 0.46 AML other m 2021-05-24T05:48:20.02
IV.CRE.HHE. ML:3.4 0.0053960805 0.56 AML other m 2021-05-24T05:48:20.87
IV.PARC.HHN. ML:1.8 0.00008335 0.3 AML other m 2021-05-24T05:48:23.40
IV.PARC.HHE. ML:1.7 0.00007105 0.66 AML other m 2021-05-24T05:48:24.88
IV.ARCI.HHN. ML:1.6 0.00005745 0.28 AML other m 2021-05-24T05:48:24.73
IV.ARCI.HHE. ML:1.8 0.00007415 0.18 AML other m 2021-05-24T05:48:24.74
IV.ATPI.EHE. ML:1.8 0.0000705 0.44 AML other m 2021-05-24T05:48:27.26
IV.ATVO.HHE. ML:1.8 0.00007680337500000001 0.5408 AML other m 2021-05-24T05:48:27.62
IV.ATVO.HHN. ML:1.7 0.000053214795000000004 0.3392 AML other m 2021-05-24T05:48:28.20
IV.ATMI.HHN. ML:2.3 0.0002525174 0.48 AML other m 2021-05-24T05:48:28.01
IV.ATMI.HHE. ML:2.2 0.00017595099999999998 0.3584 AML other m 2021-05-24T05:48:29.93
IV.ATPI.EHN. ML:1.7 0.0000607 1.18 AML other m 2021-05-24T05:48:32.78
IV.CAFI.HNN. ML:1.9 0.00015880135 0.8288 AML other m 2021-05-24T05:48:20.73
IV.CAFI.HNE. ML:2.0 0.00019482475 1.088 AML other m 2021-05-24T05:48:17.64
IV.SSP9.EHN. ML:1.9 0.00013852002 0.5216 AML other m 2021-05-24T05:48:23.29
IV.SSP9.EHE. ML:1.7 0.00007816406000000001 0.32 AML other m 2021-05-24T05:48:21.48
IV.ARCI.HNN. ML:2.0 0.0001191576 0.3008 AML other m 2021-05-24T05:48:23.45
IV.ARCI.HNE. ML:1.8 0.00007797267499999999 0.1696 AML other m 2021-05-24T05:48:24.74
IV.ATPI.HNN. ML:2.1 0.00013307071500000001 0.8608 AML other m 2021-05-24T05:48:28.78
IV.PIEI.HHN. ML:1.5 0.00002876393 0.72 AML other m 2021-05-24T05:48:33.47
IV.PIEI.HHE. ML:1.6 0.000040401375 0.2624 AML other m 2021-05-24T05:48:32.09
GU.EQUI.HHE. ML:1.6 0.000036890809999999997 0.3392 AML other m 2021-05-24T05:48:32.48
GU.EQUI.HHN. ML:1.5 0.00002965143 0.5792 AML other m 2021-05-24T05:48:34.32
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
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