Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 08-05-2022 and time 18:44:16 (Italy) in region 4 km S Impruneta (FI)

A magnitude ML 0.9 earthquake occured in region: 4 km S Impruneta (FI), on

  • 08-05-2022 16:44:16 (UTC)
  • 08-05-2022 18:44:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6490, 11.2400 at 10 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 4 14615 14615
San Casciano in Val di Pesa FI 5 17062 31677
Greve in Chianti FI 10 13862 45539
Tavarnelle Val di Pesa FI 11 7800 53339
Barberino Val d'Elsa FI 13 4386 57725
Scandicci FI 13 50609 108334
Bagno a Ripoli FI 13 25611 133945
Montespertoli FI 13 13537 147482
Firenze FI 14 382808 530290
Figline e Incisa Valdarno FI 17 23505 553795
Lastra a Signa FI 17 20156 573951
Fiesole FI 18 13969 587920
Signa FI 19 19179 607099
Rignano sull'Arno FI 19 8651 615750
Certaldo FI 20 16121 631871
Montelupo Fiorentino FI 20 14098 645969

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SE of Scandicci (50609 inhabitants)
14 Km S of Firenze (382808 inhabitants)
28 Km SE of Prato (191150 inhabitants)
37 Km N of Siena (53903 inhabitants)
41 Km SE of Pistoia (90315 inhabitants)
56 Km W of Arezzo (99543 inhabitants)
63 Km E of Lucca (89046 inhabitants)
68 Km E of Pisa (89158 inhabitants)
76 Km E of Livorno (159219 inhabitants)
83 Km E of Viareggio (62467 inhabitants)
87 Km SW of Imola (69797 inhabitants)
88 Km SW of Faenza (58541 inhabitants)
91 Km SW of Forlì (117913 inhabitants)
95 Km S of Bologna (386663 inhabitants)
97 Km SW of Cesena (96758 inhabitants)
98 Km E of Massa (69479 inhabitants)
99 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 0.9 2022-05-08
16:44:16		 43.649 11.2402 10 2023-01-31
19:03:30		 Bollettino Sismico Italiano INGV 108143391
Reviewed
Rev100 		ML 0.9 2022-05-08
16:44:16		 43.6413 11.2407 11 2022-05-08
16:50:25		 Sala Sismica INGV-Roma 104358511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-08 16:44:16 ± 0.05
Latitude 43.6490 ± 0.0027
Longitude 11.2402 ± 0.0062
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 108143391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 385
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 117
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35793
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 108143391
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-08-05 10:35:12

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 104358511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-08 16:50:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLLN.EHZ. 2022-05-08T16:45:48.26 3.0 negative manual Pg 15.31 0
IV.PAOL.HHZ. 2022-05-08T16:45:47.25 3.0 undecidable manual Sg 9.09 0
IV.MCRV.HHZ. 2022-05-08T16:45:44.31 3.0 undecidable manual Sn -6.1 0
IV.PTRJ.HHZ. 2022-05-08T16:45:40.27 3.0 undecidable manual Sg 8.14 0
IV.CERA.HHZ. 2022-05-08T16:45:22.00 3.0 undecidable manual Sn 0.68 0
IV.VVLD.HHZ. 2022-05-08T16:45:16.04 3.0 undecidable manual Sg 4.54 0
OT.OT17.EHZ. 2022-05-08T16:45:10.23 3.0 positive manual Pg 9.34 0
IV.IMOL.HNZ. 2022-05-08T16:44:43.85 3.0 undecidable manual Sn -0.48 0
IV.MOMA.HHZ. 2022-05-08T16:44:41.66 3.0 undecidable manual S -0.91 0
IV.ATFO.HHZ. 2022-05-08T16:44:39.98 3.0 undecidable manual S 0.65 0
IV.MOCL.EHZ. 2022-05-08T16:44:29.68 0.6 undecidable manual S 353 39.7269 50 0.12 49
IV.MURB.HHZ. 2022-05-08T16:44:26.87 3.0 undecidable manual P 0.66 0
IV.RUFI.EHZ. 2022-05-08T16:44:26.82 0.3 undecidable manual S 46 30.0477 50 -0.15 74
IV.CRMI.HHZ. 2022-05-08T16:44:25.74 0.6 undecidable manual S 308 26.4513 50 -0.27 49
IV.MOCL.EHZ. 2022-05-08T16:44:24.08 0.3 undecidable manual P 353 39.7269 50 0.12 73
IV.CSNT.HHZ. 2022-05-08T16:44:23.91 0.3 undecidable manual S 168 19.9689 117 -0.17 75
IV.PARC.HHZ. 2022-05-08T16:44:23.20 3.0 undecidable manual Pg -1.29 0
IT.FIE.HGZ. 2022-05-08T16:44:23.33 0.6 undecidable manual S 14 18.0708 120 -0.19 50
IV.OSSC.HHZ. 2022-05-08T16:44:22.34 0.3 undecidable manual S 178 13.875 126 0.03 78
IV.RUFI.EHZ. 2022-05-08T16:44:22.57 0.1 undecidable manual P 46 30.0477 50 0.11 100
IV.CRMI.HHZ. 2022-05-08T16:44:21.93 0.3 undecidable manual P 308 26.4513 50 0.02 77
IT.FIE.HGZ. 2022-05-08T16:44:20.59 0.6 undecidable manual P 14 18.0708 120 0.12 51
IV.CSNT.HHZ. 2022-05-08T16:44:20.76 0.3 undecidable manual P 168 19.9689 117 -0.03 77
IV.OSSC.HHZ. 2022-05-08T16:44:19.93 0.3 undecidable manual P 178 13.875 126 0.16 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.2 0.00015900000000000002 0.16 AML other m 2022-05-08T16:44:22.73
IV.OSSC.HHN. ML:1.0 0.00010005 0.44 AML other m 2022-05-08T16:44:23.39
IV.CSNT.HHN. ML:0.9 0.0000569 1.36 AML other m 2022-05-08T16:44:25.16
IV.CSNT.HHE. ML:0.9 0.00005465000000000001 1.78 AML other m 2022-05-08T16:44:25.06
IV.CRMI.HHN. ML:0.8 0.000036500000000000006 0.5 AML other m 2022-05-08T16:44:26.45
IV.CRMI.HHE. ML:0.6 0.00001865 1.66 AML other m 2022-05-08T16:44:26.91
IV.MOCL.EHE. ML:0.9 0.000026362589999999997 1.7184 AML other m 2022-05-08T16:44:29.91
IV.MOCL.EHN. ML:0.9 0.000030289594500000004 0.32 AML other m 2022-05-08T16:44:30.02
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