Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 04-05-2022 and time 11:09:29 (Italy) in region 5 km S Impruneta (FI)

A magnitude ML 0.8 earthquake occured in region: 5 km S Impruneta (FI), on

  • 04-05-2022 09:09:29 (UTC)
  • 04-05-2022 11:09:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6390, 11.2550 at 12 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 5 14615 14615
San Casciano in Val di Pesa FI 6 17062 31677
Greve in Chianti FI 8 13862 45539
Tavarnelle Val di Pesa FI 11 7800 53339
Barberino Val d'Elsa FI 13 4386 57725
Bagno a Ripoli FI 14 25611 83336
Montespertoli FI 14 13537 96873
Scandicci FI 15 50609 147482
Firenze FI 15 382808 530290
Figline e Incisa Valdarno FI 16 23505 553795
Rignano sull'Arno FI 19 8651 562446
Castellina in Chianti SI 19 2859 565305
Lastra a Signa FI 19 20156 585461
Fiesole FI 19 13969 599430
Radda in Chianti SI 19 1613 601043
Certaldo FI 20 16121 617164

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SE of Scandicci (50609 inhabitants)
15 Km S of Firenze (382808 inhabitants)
30 Km SE of Prato (191150 inhabitants)
36 Km N of Siena (53903 inhabitants)
43 Km SE of Pistoia (90315 inhabitants)
54 Km W of Arezzo (99543 inhabitants)
65 Km E of Lucca (89046 inhabitants)
69 Km E of Pisa (89158 inhabitants)
77 Km E of Livorno (159219 inhabitants)
85 Km E of Viareggio (62467 inhabitants)
88 Km SW of Imola (69797 inhabitants)
88 Km SW of Faenza (58541 inhabitants)
91 Km SW of Forlì (117913 inhabitants)
96 Km S of Bologna (386663 inhabitants)
97 Km SW of Cesena (96758 inhabitants)
98 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 0.8 2022-05-04
09:09:29		 43.639 11.2548 12 2023-01-31
19:03:09		 Bollettino Sismico Italiano INGV 104379951
Reviewed
Rev100 		ML 1.0 2022-05-04
09:09:29		 43.6533 11.2512 9 2022-05-04
09:15:27		 Sala Sismica INGV-Roma 104165191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-04 09:09:29 ± 0.05
Latitude 43.6390 ± 0.0027
Longitude 11.2548 ± 0.0062
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 104379951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 465
Semi-minor axis of confidence ellipse (meter) 216
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
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) 128
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36962
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 104165191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-04 09:15:27

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 104379951
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-08-31 11:04:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SIRI.HNZ. 2022-05-04T09:10:54.96 3.0 undecidable manual Pg 17.27 0
IV.PTRP.HHZ. 2022-05-04T09:10:50.27 3.0 negative manual Pg 14.81 0
IV.LPEL.HHZ. 2022-05-04T09:10:43.96 3.0 undecidable manual Sn 0.03 0
CR.STON.BHZ. 2022-05-04T09:10:38.04 3.0 positive manual Pn 6.15 0
IV.CMPR.HHZ. 2022-05-04T09:10:36.14 3.0 undecidable manual Pn 3.54 0
GU.RORO.HHZ. 2022-05-04T09:10:33.06 3.0 undecidable manual Sn 5.79 0
IV.FAGN.HHZ. 2022-05-04T09:10:01.05 3.0 negative manual Pn 0.48 0
IV.SSFR.HHZ. 2022-05-04T09:09:44.77 3.0 positive manual P 1.22 0
IV.MOCL.EHZ. 2022-05-04T09:09:43.30 0.6 undecidable manual S 352 41.0256 92 0.23 46
IV.MPPT.EHN. 2022-05-04T09:09:42.36 0.6 undecidable manual S 340 37.7289 92 0.17 47
IV.RUFI.EHZ. 2022-05-04T09:09:40.00 0.3 undecidable manual S 43 30.0477 93 -0.15 72
IV.BOSL.HHZ. 2022-05-04T09:09:40.96 0.6 undecidable manual S 16 33.744 92 -0.18 47
IV.CRMI.HHZ. 2022-05-04T09:09:39.59 0.6 undecidable manual S 308 28.0497 93 -0.04 49
IV.CSNT.HHZ. 2022-05-04T09:09:37.36 0.6 undecidable manual S 171 18.6702 98 0.25 48
IV.MOCL.EHZ. 2022-05-04T09:09:37.52 0.3 undecidable manual P 352 41.0256 92 0.11 70
IV.BOSL.HHZ. 2022-05-04T09:09:36.38 0.1 undecidable manual P 16 33.744 92 0.09 95
IV.MPPT.EHN. 2022-05-04T09:09:36.71 0.3 undecidable manual P 340 37.7289 92 -0.19 70
IV.RUFI.EHZ. 2022-05-04T09:09:35.81 0.1 undecidable manual P 43 30.0477 93 0.09 96
IV.CRMI.HHZ. 2022-05-04T09:09:35.23 0.3 undecidable manual P 308 28.0497 93 -0.18 71
IV.OSSC.HHZ. 2022-05-04T09:09:35.40 0.3 undecidable manual S 183 12.7761 113 -0.21 72
IV.OSSC.HHZ. 2022-05-04T09:09:33.15 0.1 undecidable manual P 183 12.7761 113 0.05 100
IV.CSNT.HHZ. 2022-05-04T09:09:33.95 0.1 undecidable manual P 171 18.6702 98 -0.01 99
IV.CARD.HHZ. 2022-05-04T09:09:32.64 3.0 undecidable manual P 0
IV.IMOL.EHZ. 2022-05-04T09:09:26.15 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.1 0.000113 0.18 AML other m 2022-05-04T09:09:35.86
IV.OSSC.HHN. ML:0.8 0.0000668 0.28 AML other m 2022-05-04T09:09:36.39
IV.CSNT.HHN. ML:0.7 0.0000381 0.18 AML other m 2022-05-04T09:09:37.88
IV.CSNT.HHE. ML:0.7 0.00003345 0.26 AML other m 2022-05-04T09:09:39.21
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