Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 24-01-2024 and time 20:45:05 (Italy) in region 2 km NE Certaldo (FI)

A magnitude ML 0.8 earthquake occured in region: 2 km NE Certaldo (FI), on

  • 24-01-2024 19:45:05 (UTC)
  • 24-01-2024 20:45:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5600, 11.0620 at 10 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 2 16121 16121
Castelfiorentino FI 9 17504 33625
Tavarnelle Val di Pesa FI 9 7800 41425
Gambassi Terme FI 9 4870 46295
Barberino Val d'Elsa FI 9 4386 50681
Montespertoli FI 9 13537 64218
San Gimignano SI 10 7820 72038
Montaione FI 12 3700 75738
Poggibonsi SI 12 29196 104934
San Casciano in Val di Pesa FI 15 17062 121996
Colle di Val d'Elsa SI 16 21620 143616
Montelupo Fiorentino FI 19 14098 157714
Empoli FI 20 48109 205823

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SW of Scandicci (50609 inhabitants)
28 Km SW of Firenze (382808 inhabitants)
35 Km NW of Siena (53903 inhabitants)
36 Km S of Prato (191150 inhabitants)
43 Km S of Pistoia (90315 inhabitants)
55 Km SE of Lucca (89046 inhabitants)
56 Km E of Pisa (89158 inhabitants)
61 Km E of Livorno (159219 inhabitants)
67 Km W of Arezzo (99543 inhabitants)
74 Km E of Viareggio (62467 inhabitants)
89 Km N of Grosseto (82087 inhabitants)
91 Km SE of Massa (69479 inhabitants)
97 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 0.8 2024-01-24
19:45:05		 43.5602 11.0622 10 2024-01-24
19:57:56		 Sala Sismica INGV-Roma 124835971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-01-24 19:45:05 ± 0.12
Latitude 43.5602 ± 0.0063
Longitude 11.0622 ± 0.0124
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 124835971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1092
Semi-minor axis of confidence ellipse (meter) 543
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 64
Circular confidence region, given by single value of horizontal uncertainty (meter) 1090.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.13760
Epicentral distance of station farthest from the epicenter (degree) 0.54229
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 124835971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-01-24 19:57:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.MAIM.HHZ. 2024-01-24T19:45:16.00 0.3 undecidable manual P 311 60.1953 50 -0.02 75
IV.LOCA.HHE. 2024-01-24T19:45:16.24 0.3 undecidable manual S 150 32.4453 50 -0.3 74
IV.PSL.EHN. 2024-01-24T19:45:15.27 1.0 undecidable manual P 348 50.9157 50 0.68 21
IV.VMGN.HHE. 2024-01-24T19:45:15.91 0.3 undecidable manual P 41 57.7977 50 0.26 72
IV.TRIF.CHE. 2024-01-24T19:45:14.67 0.3 undecidable manual P 195 51.0156 50 0.06 76
IV.MOCL.EHE. 2024-01-24T19:45:14.19 1.0 undecidable manual P 11 50.2164 50 -0.3 24
IV.CSNT.HHZ. 2024-01-24T19:45:13.01 0.3 undecidable manual S 118 20.7681 116 -0.17 78
IV.PII.HHZ. 2024-01-24T19:45:13.91 0.3 negative manual P 293 46.7199 50 -0.04 77
IV.FROS.CHN. 2024-01-24T19:45:13.01 0.3 undecidable manual P 169 39.627 50 0.16 76
IV.LOCA.HHE. 2024-01-24T19:45:12.00 0.1 undecidable manual P 150 32.4453 50 0.26 100
IV.OSSC.HHZ. 2024-01-24T19:45:11.68 0.3 undecidable manual S 105 15.2736 123 0.14 79
IV.CRMI.HHZ. 2024-01-24T19:45:10.50 0.3 undecidable manual P 346 26.9508 50 -0.4 73
IV.CSNT.HHZ. 2024-01-24T19:45:09.55 0.3 undecidable manual P 118 20.7681 116 -0.25 77
IV.OSSC.HHZ. 2024-01-24T19:45:08.97 0.3 undecidable manual P 105 15.2736 123 0.12 80
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:0.9 0.00008025 1.2 AML other m 2024-01-24T19:45:11.89
IV.OSSC.HHN. ML:0.9 0.00006782612499999999 0.1792 AML other m 2024-01-24T19:45:12.43
IV.CSNT.HHN. ML:0.6 0.00002846688 0.256 AML other m 2024-01-24T19:45:15.62
IV.CSNT.HHE. ML:0.6 0.000025617540000000003 0.2816 AML other m 2024-01-24T19:45:14.00
IV.CRMI.HHN. ML:0.9 0.00003957412 0.1408 AML other m 2024-01-24T19:45:14.48
IV.CRMI.HHE. ML:0.7 0.000023337767000000002 0.2688 AML other m 2024-01-24T19:45:14.42
IV.PII.HHE. ML:0.8 0.000022055795 0.32 AML other m 2024-01-24T19:45:22.03
IV.PII.HHN. ML:0.7 0.00001633497 0.2176 AML other m 2024-01-24T19:45:20.93
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