Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 07-01-2024 and time 00:32:48 (Italy) in region 3 km SW Certaldo (FI)

A magnitude ML 1.4 earthquake occured in region: 3 km SW Certaldo (FI), on

  • 06-01-2024 23:32:48 (UTC)
  • 07-01-2024 00:32:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5260, 11.0200 at 6 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
Certaldo FI 3 16121 16121
Gambassi Terme FI 6 4870 20991
San Gimignano SI 7 7820 28811
Montaione FI 9 3700 32511
Castelfiorentino FI 10 17504 50015
Poggibonsi SI 12 29196 79211
Barberino Val d'Elsa FI 12 4386 83597
Tavarnelle Val di Pesa FI 13 7800 91397
Montespertoli FI 14 13537 104934
Colle di Val d'Elsa SI 14 21620 126554
Volterra PI 19 10519 137073
San Casciano in Val di Pesa FI 20 17062 154135

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Scandicci (50609 inhabitants)
33 Km SW of Firenze (382808 inhabitants)
34 Km NW of Siena (53903 inhabitants)
40 Km S of Prato (191150 inhabitants)
46 Km S of Pistoia (90315 inhabitants)
54 Km E of Pisa (89158 inhabitants)
55 Km SE of Lucca (89046 inhabitants)
57 Km E of Livorno (159219 inhabitants)
70 Km W of Arezzo (99543 inhabitants)
73 Km SE of Viareggio (62467 inhabitants)
85 Km N of Grosseto (82087 inhabitants)
91 Km SE of Massa (69479 inhabitants)
96 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 1.4 2024-01-06
23:32:48		 43.5263 11.0202 6 2024-01-07
00:00:37		 Sala Sismica INGV-Roma 124523031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-01-06 23:32:48 ± 0.12
Latitude 43.5263 ± 0.0063
Longitude 11.0202 ± 0.0161
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 124523031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1280
Semi-minor axis of confidence ellipse (meter) 618
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.16368
Epicentral distance of station farthest from the epicenter (degree) 0.41998
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 124523031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-01-07 00:00:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2024-01-06T23:33:03.92 0.3 undecidable manual S 299 45.3213 50 -0.25 70
IV.FROS.CHZ. 2024-01-06T23:33:01.01 0.3 undecidable manual S 163 36.8298 99 -0.46 68
IV.CRMI.HHZ. 2024-01-06T23:32:58.79 0.1 undecidable manual S 354 30.0477 102 -0.37 93
IV.TRIF.CHE. 2024-01-06T23:32:57.57 0.3 undecidable manual P 192 46.62 50 -0.19 70
IV.PII.HHZ. 2024-01-06T23:32:57.86 0.1 undecidable manual P 299 45.3213 50 0.3 92
IV.FROS.CHZ. 2024-01-06T23:32:56.32 0.3 undecidable manual P 163 36.8298 99 0.32 70
IV.CSNT.HHZ. 2024-01-06T23:32:56.19 0.3 undecidable manual S 105 22.4553 105 -0.43 70
IV.OSSC.HHZ. 2024-01-06T23:32:55.22 0.3 undecidable manual S 91 18.1707 109 0.05 76
IV.LOCA.HNE. 2024-01-06T23:32:55.07 0.1 undecidable manual P 141 31.2465 101 0.17 97
IV.CRMI.HHZ. 2024-01-06T23:32:54.90 0.1 undecidable manual P 354 30.0477 102 0.23 96
IV.CSNT.HHZ. 2024-01-06T23:32:53.29 0.1 undecidable manual P 105 22.4553 105 0.09 100
IV.OSSC.HHZ. 2024-01-06T23:32:52.65 0.1 undecidable manual P 91 18.1707 109 0.29 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.5 0.000303 0.18 AML other m 2024-01-06T23:32:55.44
IV.OSSC.HHN. ML:1.3 0.0001645 0.86 AML other m 2024-01-06T23:32:55.24
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