Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 09-05-2022 and time 09:50:30 (UTC) in region 3 km S Impruneta (FI)

A magnitude ML 1.5 earthquake occured in region: 3 km S Impruneta (FI), on

  • 09-05-2022 09:50:30 (UTC)
  • 09-05-2022 11:50:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6620, 11.2500 at 7 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
Impruneta FI 3 14615 14615
San Casciano in Val di Pesa FI 5 17062 31677
Greve in Chianti FI 10 13862 45539
Bagno a Ripoli FI 12 25611 71150
Firenze FI 12 382808 453958
Scandicci FI 12 50609 504567
Tavarnelle Val di Pesa FI 13 7800 512367
Montespertoli FI 14 13537 525904
Barberino Val d'Elsa FI 15 4386 530290
Figline e Incisa Valdarno FI 16 23505 553795
Fiesole FI 17 13969 567764
Lastra a Signa FI 17 20156 587920
Rignano sull'Arno FI 18 8651 596571
Signa FI 18 19179 615750
Sesto Fiorentino FI 20 48958 664708
Montelupo Fiorentino FI 20 14098 678806
Campi Bisenzio FI 20 46166 724972
Pontassieve FI 20 20603 745575

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)
63 Km E of Lucca (89046 inhabitants)
68 Km E of Pisa (89158 inhabitants)
77 Km E of Livorno (159219 inhabitants)
83 Km E of Viareggio (62467 inhabitants)
86 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)
96 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
Bulletin
Rev1000 		ML 1.5 2022-05-09
09:50:30		 43.662 11.2498 7 2023-01-31
19:03:52		 Bollettino Sismico Italiano INGV 110944091
Reviewed
Rev100 		ML 1.5 2022-05-09
09:50:30		 43.6688 11.2583 2 2022-05-09
09:59:10		 Sala Sismica INGV-Roma 104394111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-09 09:50:30 ± 0.08
Latitude 43.6620 ± 0.0036
Longitude 11.2498 ± 0.0087
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 110944091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 652
Semi-minor axis of confidence ellipse (meter) 192
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.11242
Epicentral distance of station farthest from the epicenter (degree) 0.66190
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 104394111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-09 09:59:10

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 110944091
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-10-18 16:04:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LMD.HHZ. 2022-05-09T09:50:49.32 0.6 undecidable manual S 38 58.7967 50 0.19 45
IV.SEI.HHZ. 2022-05-09T09:50:45.24 0.6 undecidable manual S 11 44.3223 50 -0.03 48
GU.CARD.HHZ. 2022-05-09T09:50:44.46 1.0 undecidable manual P 304 73.4709 50 1.1 16
IV.MOCL.EHZ. 2022-05-09T09:50:43.20 0.6 undecidable manual S 352 38.4282 50 -0.49 44
IV.BDI.HHZ. 2022-05-09T09:50:43.26 0.3 undecidable manual P 311 68.6757 50 0.65 59
GU.MAIM.HHZ. 2022-05-09T09:50:42.65 0.6 undecidable manual P 295 66.7776 50 0.32 43
IV.MPPT.EHZ. 2022-05-09T09:50:42.16 0.6 undecidable manual S 339 35.1426 102 -0.44 45
IV.LMD.HHZ. 2022-05-09T09:50:41.28 0.3 undecidable manual P 38 58.7967 50 0.18 68
IV.BOSL.HHZ. 2022-05-09T09:50:40.88 0.6 undecidable manual S 18 31.4463 103 -0.45 45
IV.RUFI.EHZ. 2022-05-09T09:50:40.13 0.6 undecidable manual S 47 28.5492 104 -0.22 47
IV.CRMI.HHZ. 2022-05-09T09:50:39.62 0.6 undecidable manual S 304 26.2515 106 0.04 49
IV.SEI.HHZ. 2022-05-09T09:50:38.80 0.1 undecidable manual P 11 44.3223 50 -0.07 95
IV.MOCL.EHZ. 2022-05-09T09:50:37.46 0.3 undecidable manual P 352 38.4282 50 -0.49 66
IV.CSNT.HHZ. 2022-05-09T09:50:37.80 0.6 undecidable manual S 171 21.1677 109 -0.11 49
IV.OSSC.HHZ. 2022-05-09T09:50:36.11 0.6 undecidable manual S 181 15.3735 115 0.08 50
IV.RUFI.EHZ. 2022-05-09T09:50:36.13 0.1 positive manual P 47 28.5492 104 0.1 97
IV.BOSL.HHZ. 2022-05-09T09:50:36.59 0.1 undecidable manual P 18 31.4463 103 -0.01 98
IT.FIE.HGZ. 2022-05-09T09:50:36.67 0.6 undecidable manual S 12 16.4724 114 0.28 48
IV.MPPT.EHZ. 2022-05-09T09:50:36.90 0.3 undecidable manual P 339 35.1426 102 -0.43 67
IV.CRMI.HHZ. 2022-05-09T09:50:35.36 0.3 undecidable manual P 304 26.2515 106 -0.23 71
IV.FIR.HNZ. 2022-05-09T09:50:35.52 0.6 undecidable manual S 2 12.4764 120 0.38 47
IV.CSNT.HHZ. 2022-05-09T09:50:34.37 0.3 undecidable manual P 171 21.1677 109 -0.25 71
IT.FIE.HGZ. 2022-05-09T09:50:34.17 0.3 undecidable manual P 12 16.4724 114 0.43 69
IV.OSSC.HHZ. 2022-05-09T09:50:33.48 0.1 undecidable manual P 181 15.3735 115 -0.06 100
IV.FIR.HNZ. 2022-05-09T09:50:33.27 0.3 undecidable manual P 2 12.4764 120 0.25 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHN. ML:1.6 0.0004275 1.54 AML other m 2022-05-09T09:50:37.20
IV.OSSC.HHE. ML:1.8 0.0006554999999999999 0.5 AML other m 2022-05-09T09:50:37.22
IV.CSNT.HHN. ML:1.5 0.00023349999999999998 1.66 AML other m 2022-05-09T09:50:38.86
IV.CRMI.HHN. ML:1.5 0.000186 0.28 AML other m 2022-05-09T09:50:40.16
IV.CSNT.HHE. ML:1.6 0.00028250000000000004 0.3 AML other m 2022-05-09T09:50:40.46
IV.CRMI.HHE. ML:1.2 0.00009504999999999999 0.58 AML other m 2022-05-09T09:50:40.94
IV.RUFI.EHE. ML:1.4 0.00014649999999999998 0.28 AML other m 2022-05-09T09:50:41.14
IV.RUFI.EHN. ML:1.5 0.0001575 0.56 AML other m 2022-05-09T09:50:41.51
IV.BOSL.HHN. ML:1.3 0.00009175 1.08 AML other m 2022-05-09T09:50:41.72
IV.BOSL.HHE. ML:1.4 0.0001085 0.22 AML other m 2022-05-09T09:50:41.71
IV.MPPT.EHE. ML:1.3 0.00008715 1.2 AML other m 2022-05-09T09:50:43.85
IV.MOCL.EHE. ML:1.8 0.0002055 0.76 AML other m 2022-05-09T09:50:44.01
IV.MOCL.EHN. ML:1.8 0.00020600000000000002 0.78 AML other m 2022-05-09T09:50:44.93
IV.MPPT.EHN. ML:1.1 0.00005715 0.34 AML other m 2022-05-09T09:50:46.16
IV.SEI.HHN. ML:1.9 0.000265 0.7 AML other m 2022-05-09T09:50:48.11
IV.SEI.HHE. ML:1.6 0.0001125 0.68 AML other m 2022-05-09T09:50:49.01
IV.LMD.HHE. ML:1.7 0.00010175 0.3 AML other m 2022-05-09T09:50:50.28
IV.LMD.HHN. ML:1.6 0.00008044999999999999 0.66 AML other m 2022-05-09T09:50:50.71
IV.BDI.HHN. ML:1.5 0.000048549999999999994 0.9 AML other m 2022-05-09T09:50:54.32
IV.BDI.HHE. ML:1.4 0.00003925 0.28 AML other m 2022-05-09T09:50:54.68
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