Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 09-05-2022 and time 20:16:01 (Italy) in region 2 km S Impruneta (FI)

A magnitude ML 1.0 earthquake occured in region: 2 km S Impruneta (FI), on

  • 09-05-2022 18:16:01 (UTC)
  • 09-05-2022 20:16:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6650, 11.2540 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Impruneta FI 2 14615 14615
San Casciano in Val di Pesa FI 6 17062 31677
Greve in Chianti FI 10 13862 45539
Bagno a Ripoli FI 11 25611 71150
Firenze FI 12 382808 453958
Scandicci FI 12 50609 504567
Tavarnelle Val di Pesa FI 13 7800 512367
Montespertoli FI 15 13537 525904
Barberino Val d'Elsa FI 15 4386 530290
Figline e Incisa Valdarno FI 16 23505 553795
Fiesole FI 16 13969 567764
Lastra a Signa FI 17 20156 587920
Rignano sull'Arno FI 17 8651 596571
Signa FI 18 19179 615750
Sesto Fiorentino FI 19 48958 664708
Pontassieve FI 20 20603 685311
Campi Bisenzio FI 20 46166 731477

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km S of Firenze (382808 inhabitants)
12 Km SE of Scandicci (50609 inhabitants)
27 Km SE of Prato (191150 inhabitants)
39 Km N of Siena (53903 inhabitants)
40 Km SE of Pistoia (90315 inhabitants)
55 Km W of Arezzo (99543 inhabitants)
64 Km E of Lucca (89046 inhabitants)
69 Km E of Pisa (89158 inhabitants)
77 Km E of Livorno (159219 inhabitants)
84 Km E of Viareggio (62467 inhabitants)
85 Km SW of Imola (69797 inhabitants)
86 Km SW of Faenza (58541 inhabitants)
89 Km SW of Forlì (117913 inhabitants)
93 Km S of Bologna (386663 inhabitants)
95 Km SW of Cesena (96758 inhabitants)
98 Km E of Massa (69479 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
Reviewed
Rev100 		ML 1.0 2022-05-09
18:16:01		 43.6653 11.2538 8 2022-05-09
18:25:14		 Sala Sismica INGV-Roma 104412261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-09 18:16:01 ± 0.06
Latitude 43.6653 ± 0.0027
Longitude 11.2538 ± 0.0050
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 104412261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 333
Semi-minor axis of confidence ellipse (meter) 296
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 102
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.02068
Epicentral distance of station farthest from the epicenter (degree) 0.50722
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 104412261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-09 18:25:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2022-05-09T18:16:20.33 0.6 undecidable manual S 95 56.2992 50 0.62 39
IV.SEI.HHZ. 2022-05-09T18:16:16.49 0.6 undecidable manual S 11 43.9227 50 0.07 46
IV.MOCL.EHZ. 2022-05-09T18:16:14.71 0.6 undecidable manual S 351 38.1285 50 -0.15 46
IV.MPPT.EHZ. 2022-05-09T18:16:13.97 0.6 undecidable manual S 338 34.9428 102 0.08 47
IV.BOSL.HHZ. 2022-05-09T18:16:12.44 0.6 undecidable manual S 18 31.0467 104 -0.11 47
IV.CRE.HHZ. 2022-05-09T18:16:12.04 0.6 undecidable manual P 95 56.2992 50 0.04 46
IV.RUFI.EHZ. 2022-05-09T18:16:11.43 0.6 undecidable manual S 47 28.0497 105 -0.12 47
IV.CRMI.HHZ. 2022-05-09T18:16:10.85 0.6 undecidable manual S 303 26.3514 106 -0.13 47
IV.SEI.HHZ. 2022-05-09T18:16:10.13 1.0 undecidable manual P 11 43.9227 50 0.03 23
IV.MPPT.EHZ. 2022-05-09T18:16:08.23 1.0 positive manual P 338 34.9428 102 -0.41 22
IV.MOCL.EHZ. 2022-05-09T18:16:08.86 0.6 positive manual P 351 38.1285 50 -0.34 44
IV.OSSC.HHZ. 2022-05-09T18:16:07.21 0.6 undecidable manual S 182 15.7731 116 -0.33 46
IV.RUFI.EHZ. 2022-05-09T18:16:07.39 0.3 positive manual P 47 28.0497 105 0.1 71
IV.BOSL.HHZ. 2022-05-09T18:16:07.91 0.6 undecidable manual P 18 31.0467 104 0.04 48
ZH.T1646.HNE. 2022-05-09T18:16:06.87 0.6 undecidable manual S 267 11.6772 123 0.55 44
IV.CRMI.HHZ. 2022-05-09T18:16:06.79 0.6 undecidable manual P 303 26.3514 106 -0.17 47
IV.CSNT.HHZ. 2022-05-09T18:16:05.62 1.0 undecidable manual P 172 21.5673 110 -0.43 22
ZH.T1647.EHE. 2022-05-09T18:16:05.28 0.6 undecidable manual S 144 7.9809 134 -0.02 50
ZH.T1648.EHE. 2022-05-09T18:16:04.28 0.6 undecidable manual S 89 2.2977 163 0.05 50
ZH.T1646.HNE. 2022-05-09T18:16:04.48 0.1 undecidable manual P 267 11.6772 123 0.21 95
IV.OSSC.HHZ. 2022-05-09T18:16:04.81 0.3 undecidable manual P 182 15.7731 116 -0.16 72
ZH.T1647.EHE. 2022-05-09T18:16:03.69 0.1 undecidable manual P 144 7.9809 134 0 100
ZH.T1648.EHE. 2022-05-09T18:16:03.14 0.1 undecidable manual P 89 2.2977 163 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHE. ML:0.6 0.000026700000000000002 0.28 AML other m 2022-05-09T18:16:11.33
IV.CRMI.HHN. ML:0.9 0.00005085 0.54 AML other m 2022-05-09T18:16:11.33
IV.CSNT.HHE. ML:1.1 0.0000837 1.3 AML other m 2022-05-09T18:16:12.66
IV.CSNT.HHN. ML:1.1 0.0000922 0.54 AML other m 2022-05-09T18:16:12.58
IV.BOSL.HHE. ML:1.1 0.000060650000000000004 0.18 AML other m 2022-05-09T18:16:12.79
IV.BOSL.HHN. ML:0.9 0.0000407 1.58 AML other m 2022-05-09T18:16:13.80
IV.MPPT.EHE. ML:0.9 0.0000281 0.58 AML other m 2022-05-09T18:16:14.43
IV.MPPT.EHN. ML:0.7 0.00001925 0.62 AML other m 2022-05-09T18:16:16.75
IV.SEI.HHN. ML:1.6 0.000127 1.64 AML other m 2022-05-09T18:16:17.01
IV.SEI.HHE. ML:1.4 0.00007939999999999999 1.6 AML other m 2022-05-09T18:16:20.08
IV.CRE.HHE. ML:1.0 0.0000178 1.4 AML other m 2022-05-09T18:16:20.93
IV.CRE.HHN. ML:1.0 0.0000185 1.08 AML other m 2022-05-09T18:16:24.70
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