Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 17-05-2024 and time 06:24:21 (UTC) in region 3 km SW Gambassi Terme (FI)

A magnitude ML 1.8 earthquake occured in region: 3 km SW Gambassi Terme (FI), on

  • 17-05-2024 06:24:21 (UTC)
  • 17-05-2024 08:24:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5160, 10.9440 at 5 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
Gambassi Terme FI 3 4870 4870
Montaione FI 5 3700 8570
Certaldo FI 9 16121 24691
San Gimignano SI 10 7820 32511
Castelfiorentino FI 10 17504 50015
Volterra PI 14 10519 60534
Palaia PI 17 4612 65146
Poggibonsi SI 17 29196 94342
Colle di Val d'Elsa SI 18 21620 115962
Lajatico PI 18 1336 117298
Montespertoli FI 18 13537 130835
Peccioli PI 18 4807 135642
Barberino Val d'Elsa FI 19 4386 140028
Tavarnelle Val di Pesa FI 19 7800 147828
San Miniato PI 20 27934 175762

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Scandicci (50609 inhabitants)
38 Km SW of Firenze (382808 inhabitants)
38 Km NW of Siena (53903 inhabitants)
43 Km SW of Prato (191150 inhabitants)
47 Km S of Pistoia (90315 inhabitants)
49 Km E of Pisa (89158 inhabitants)
51 Km SE of Lucca (89046 inhabitants)
51 Km E of Livorno (159219 inhabitants)
68 Km SE of Viareggio (62467 inhabitants)
76 Km W of Arezzo (99543 inhabitants)
85 Km N of Grosseto (82087 inhabitants)
87 Km SE of Massa (69479 inhabitants)
92 Km SE of Carrara (63133 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 1.8 2024-05-17
06:24:21		 43.5163 10.9435 5 2024-05-17
06:34:32		 Sala Sismica INGV-Roma 127804941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-05-17 06:24:21 ± 0.13
Latitude 43.5163 ± 0.0063
Longitude 10.9435 ± 0.0099
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 127804941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 948
Semi-minor axis of confidence ellipse (meter) 371
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 54
Circular confidence region, given by single value of horizontal uncertainty (meter) 950.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.72755
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 127804941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-05-17 06:34:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.EQUI.HHZ. 2024-05-17T06:24:50.31 3.0 undecidable manual S -2.21 0
IV.SEI.HHZ. 2024-05-17T06:24:43.87 0.6 undecidable manual S 29 68.2761 50 0.58 41
IV.BDI.HHZ. 2024-05-17T06:24:42.34 0.3 undecidable manual S 335 66.6777 50 -0.53 63
GU.POPM.HHZ. 2024-05-17T06:24:40.61 0.3 undecidable manual S 346 60.495 50 -0.61 62
IV.CASP.HHZ. 2024-05-17T06:24:37.20 1.0 undecidable manual P 185 80.7636 50 1.3 14
IV.LMD.HHZ. 2024-05-17T06:24:37.20 3.0 negative manual P -0.01 0
IV.CAFI.HHZ. 2024-05-17T06:24:36.11 3.0 undecidable manual P -0.76 0
IV.TRIF.CHZ. 2024-05-17T06:24:35.51 3.0 undecidable manual S -1.75 0
IV.PII.HHZ. 2024-05-17T06:24:34.85 0.6 undecidable manual S 304 40.626 97 -0.62 42
IV.SEI.HHZ. 2024-05-17T06:24:34.23 0.1 undecidable manual P 29 68.2761 50 0.25 89
IV.VMGN.HHZ. 2024-05-17T06:24:34.66 3.0 positive manual P 0.71 0
IV.LOCA.HHZ. 2024-05-17T06:24:33.23 0.3 undecidable manual S 132 34.6431 98 -0.19 72
IV.BDI.HHZ. 2024-05-17T06:24:33.89 0.1 undecidable manual P 335 66.6777 50 0.15 91
IV.FROS.CHZ. 2024-05-17T06:24:33.80 0.3 undecidable manual S 153 38.1285 98 -0.8 59
GU.POPM.HHZ. 2024-05-17T06:24:33.01 0.1 undecidable manual P 346 60.495 50 0.22 91
GU.MAIM.HHZ. 2024-05-17T06:24:32.32 3.0 negative manual P -0.1 0
IV.RUFI.EHZ. 2024-05-17T06:24:31.88 3.0 undecidable manual P -0.39 0
IV.CRMI.HHZ. 2024-05-17T06:24:31.99 0.3 undecidable manual S 5 31.1466 99 -0.22 72
IV.MPPT.EHZ. 2024-05-17T06:24:31.02 0.1 undecidable manual P 13 50.3163 50 -0.19 93
IV.CSNT.HHZ. 2024-05-17T06:24:30.64 0.3 undecidable manual S 100 28.3494 100 -0.61 65
IV.FROS.CHZ. 2024-05-17T06:24:29.14 0.1 undecidable manual P 153 38.1285 98 0.17 96
IV.PII.HHZ. 2024-05-17T06:24:29.76 0.1 negative manual P 304 40.626 97 0.29 93
IV.OSSC.HHZ. 2024-05-17T06:24:29.93 0.6 undecidable manual S 88 24.3534 102 0.04 50
IV.LOCA.HHZ. 2024-05-17T06:24:28.66 0.1 undecidable manual P 132 34.6431 98 0.37 92
IV.CSNT.HHZ. 2024-05-17T06:24:27.08 0.1 undecidable manual P 100 28.3494 100 0.05 100
IV.CRMI.HHZ. 2024-05-17T06:24:27.83 0.1 positive manual P 5 31.1466 99 0.25 96
IV.OSSC.HHZ. 2024-05-17T06:24:26.50 0.1 undecidable manual P 88 24.3534 102 0.25 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.9 0.0005200000000000001 0.42 AML other m 2024-05-17T06:24:30.35
IV.OSSC.HHN. ML:1.9 0.00048350000000000004 0.32 AML other m 2024-05-17T06:24:30.84
IV.CSNT.HHN. ML:1.8 0.00031800000000000003 0.2 AML other m 2024-05-17T06:24:30.98
IV.CSNT.HHE. ML:1.7 0.0002755 1.66 AML other m 2024-05-17T06:24:31.97
IV.CRMI.HHE. ML:1.5 0.00014250000000000002 0.96 AML other m 2024-05-17T06:24:32.34
IV.CRMI.HHN. ML:1.6 0.00020150000000000002 0.34 AML other m 2024-05-17T06:24:32.70
IV.LOCA.HHE. ML:1.7 0.000202 0.28 AML other m 2024-05-17T06:24:34.90
IV.LOCA.HHN. ML:1.8 0.000242 1.64 AML other m 2024-05-17T06:24:34.91
IV.FROS.CHE. ML:2.3 0.0008085 0.38 AML other m 2024-05-17T06:24:35.27
IV.FROS.CHN. ML:2.3 0.000759 0.42 AML other m 2024-05-17T06:24:35.27
IV.PII.HHE. ML:1.8 0.0002275 1.48 AML other m 2024-05-17T06:24:35.77
IV.PII.HHN. ML:1.9 0.00028300000000000005 1.1 AML other m 2024-05-17T06:24:36.92
IV.MPPT.EHE. ML:1.4 0.00006525 0.52 AML other m 2024-05-17T06:24:38.51
IV.MPPT.EHN. ML:1.5 0.0000882 1.46 AML other m 2024-05-17T06:24:39.04
IV.SEI.HHN. ML:2.2 0.00027850000000000005 0.54 AML other m 2024-05-17T06:24:45.57
IV.SEI.HHE. ML:1.9 0.00014000000000000001 0.82 AML other m 2024-05-17T06:24:46.49
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