Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 09-05-2022 and time 02:06:48 (UTC) in region 3 km S Impruneta (FI)

A magnitude ML 1.6 earthquake occured in region: 3 km S Impruneta (FI), on

  • 09-05-2022 02:06:48 (UTC)
  • 09-05-2022 04:06:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6590, 11.2490 at 8 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
Scandicci FI 12 50609 121759
Tavarnelle Val di Pesa FI 12 7800 129559
Firenze FI 12 382808 512367
Montespertoli FI 14 13537 525904
Barberino Val d'Elsa FI 14 4386 530290
Figline e Incisa Valdarno FI 16 23505 553795
Lastra a Signa FI 17 20156 573951
Fiesole FI 17 13969 587920
Rignano sull'Arno FI 18 8651 596571
Signa FI 18 19179 615750
Sesto Fiorentino FI 20 48958 664708

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SE of Scandicci (50609 inhabitants)
12 Km S of Firenze (382808 inhabitants)
28 Km SE of Prato (191150 inhabitants)
38 Km N of Siena (53903 inhabitants)
41 Km SE of Pistoia (90315 inhabitants)
55 Km W of Arezzo (99543 inhabitants)
64 Km E of Lucca (89046 inhabitants)
68 Km E of Pisa (89158 inhabitants)
77 Km E of Livorno (159219 inhabitants)
84 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)
100 Km N of Grosseto (82087 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 1.6 2022-05-09
02:06:48		 43.6588 11.2493 8 2023-01-31
19:03:32		 Bollettino Sismico Italiano INGV 108589411
Reviewed
Rev100 		ML 1.6 2022-05-09
02:06:48		 43.6572 11.2572 9 2022-05-09
02:13:10		 Sala Sismica INGV-Roma 104370241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-09 02:06:48 ± 0.06
Latitude 43.6588 ± 0.0027
Longitude 11.2493 ± 0.0062
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 108589411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 473
Semi-minor axis of confidence ellipse (meter) 235
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.53240
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 108589411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-08-15 22:17:27

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 104370241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-09 02:13:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.HNZ. 2022-05-09T02:07:20.41 3.0 undecidable manual Pn 0.38 0
IV.ATMI.HHZ. 2022-05-09T02:07:17.79 3.0 undecidable manual S 0.07 0
IV.LMD.HHZ. 2022-05-09T02:07:07.55 0.3 undecidable manual S 38 59.0964 50 0.4 65
GU.POPM.HHZ. 2022-05-09T02:07:06.95 0.3 undecidable manual S 318 58.1973 50 0.05 70
IV.SEI.HHZ. 2022-05-09T02:07:03.34 0.3 undecidable manual S 11 44.7219 50 0.03 72
IV.BDI.HHZ. 2022-05-09T02:07:02.35 3.0 positive manual P 1.53 0
IV.MOCL.EHN. 2022-05-09T02:07:01.71 0.3 undecidable manual S 352 38.8278 50 -0.01 73
IV.MPPT.EHZ. 2022-05-09T02:07:00.61 0.3 undecidable manual S 339 35.5422 50 -0.23 70
IV.LMD.HHZ. 2022-05-09T02:06:59.44 0.1 undecidable manual P 38 59.0964 50 0.28 89
IV.BOSL.HHZ. 2022-05-09T02:06:59.24 0.3 undecidable manual S 18 31.8459 104 -0.39 68
GU.POPM.HHZ. 2022-05-09T02:06:59.47 0.3 undecidable manual P 318 58.1973 50 0.45 64
IV.RUFI.EHZ. 2022-05-09T02:06:58.30 0.3 undecidable manual S 46 28.8489 106 -0.33 69
IV.PII.HHZ. 2022-05-09T02:06:58.90 3.0 undecidable manual P -0.17 0
IV.CRMI.HHZ. 2022-05-09T02:06:57.80 0.3 undecidable manual S 305 26.4513 107 -0.03 74
IV.SEI.HHZ. 2022-05-09T02:06:56.97 0.1 undecidable manual P 11 44.7219 50 0.03 96
IV.MPPT.EHZ. 2022-05-09T02:06:55.03 0.1 positive manual P 339 35.5422 50 -0.49 88
IV.MOCL.EHN. 2022-05-09T02:06:55.88 0.1 undecidable manual P 352 38.8278 50 -0.14 94
IV.CSNT.HHZ. 2022-05-09T02:06:55.93 0.3 undecidable manual S 171 20.868 111 -0.08 74
IV.OSSC.HHZ. 2022-05-09T02:06:54.46 0.3 undecidable manual S 181 14.9739 118 0.3 71
IT.FIE.HGE. 2022-05-09T02:06:54.89 0.1 undecidable manual S 12 16.872 116 0.16 98
IV.RUFI.EHZ. 2022-05-09T02:06:54.18 0.1 positive manual P 46 28.8489 106 -0.06 98
IV.BOSL.HHZ. 2022-05-09T02:06:54.72 0.1 negative manual P 18 31.8459 104 -0.1 97
IV.FIR.HHZ. 2022-05-09T02:06:53.62 0.3 undecidable manual S 2 12.876 122 0.12 75
IV.CRMI.HHZ. 2022-05-09T02:06:53.76 0.1 undecidable manual P 305 26.4513 107 -0.02 99
IV.CSNT.HHZ. 2022-05-09T02:06:52.47 0.1 positive manual P 171 20.868 111 -0.25 95
IT.FIE.HGE. 2022-05-09T02:06:52.31 0.1 undecidable manual P 12 16.872 116 0.32 95
IV.FIR.HHZ. 2022-05-09T02:06:51.44 0.1 undecidable manual P 2 12.876 122 0.16 99
IV.OSSC.HHZ. 2022-05-09T02:06:51.59 0.1 positive manual P 181 14.9739 118 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.7 0.0005145 0.62 AML other m 2022-05-09T02:06:54.84
IV.OSSC.HHN. ML:1.6 0.000409 1.28 AML other m 2022-05-09T02:06:55.89
IV.CSNT.HHE. ML:1.6 0.00027850000000000005 0.86 AML other m 2022-05-09T02:06:58.52
IV.CRMI.HHN. ML:1.5 0.000175 0.26 AML other m 2022-05-09T02:06:58.33
IV.CRMI.HHE. ML:1.2 0.00009135 0.34 AML other m 2022-05-09T02:06:58.19
IV.RUFI.EHE. ML:1.7 0.0002875 0.26 AML other m 2022-05-09T02:06:59.23
IV.CSNT.HHN. ML:1.5 0.0002525 0.58 AML other m 2022-05-09T02:06:59.43
IV.RUFI.EHN. ML:1.6 0.00019800000000000002 0.64 AML other m 2022-05-09T02:06:59.31
IV.BOSL.HHE. ML:1.5 0.000134 0.42 AML other m 2022-05-09T02:06:59.64
IV.BOSL.HHN. ML:1.4 0.00011350000000000001 1.1 AML other m 2022-05-09T02:06:59.31
IV.MPPT.EHE. ML:1.2 0.0000636 1.66 AML other m 2022-05-09T02:07:00.86
IV.MPPT.EHN. ML:1.1 0.000055499999999999994 0.42 AML other m 2022-05-09T02:07:01.65
IV.SEI.HHN. ML:2.1 0.00035749999999999996 0.3 AML other m 2022-05-09T02:07:04.68
IV.SEI.HHE. ML:1.6 0.000126 0.94 AML other m 2022-05-09T02:07:05.51
GU.POPM.HHN. ML:1.5 0.00007625 0.26 AML other m 2022-05-09T02:07:07.56
IV.LMD.HHE. ML:1.7 0.00010899999999999999 0.58 AML other m 2022-05-09T02:07:07.54
GU.POPM.HHE. ML:1.5 0.00006615 1.74 AML other m 2022-05-09T02:07:07.88
IV.LMD.HHN. ML:1.7 0.00010675 0.72 AML other m 2022-05-09T02:07:08.52
IV.PII.HHE. ML:1.6 0.0000948 0.32 AML other m 2022-05-09T02:07:11.39
IV.PII.HHN. ML:1.7 0.0001095 0.76 AML other m 2022-05-09T02:07:11.91
IV.ATMI.HHE. ML:1.7 0.00006325 0.36 AML other m 2022-05-09T02:07:21.71
IV.ATMI.HHN. ML:1.7 0.00005305 0.76 AML other m 2022-05-09T02:07:21.43
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