Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 18-02-2024 and time 03:21:45 (UTC) in region 4 km S Radicondoli (SI)

A magnitude ML 1.8 earthquake occured in region: 4 km S Radicondoli (SI), on

  • 18-02-2024 03:21:45 (UTC)
  • 18-02-2024 04:21:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2220, 11.0510 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
Radicondoli SI 5 914 914
Chiusdino SI 8 1903 2817
Montieri GR 11 1204 4021
Castelnuovo di Val di Cecina PI 12 2231 6252
Casole d'Elsa SI 13 3897 10149
Monticiano SI 14 1571 11720
Sovicille SI 16 10116 21836
Pomarance PI 17 5897 27733
Monterotondo Marittimo GR 18 1371 29104

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km W of Siena (53903 inhabitants)
52 Km N of Grosseto (82087 inhabitants)
61 Km S of Scandicci (50609 inhabitants)
63 Km S of Firenze (382808 inhabitants)
70 Km SE of Livorno (159219 inhabitants)
73 Km W of Arezzo (99543 inhabitants)
73 Km S of Prato (191150 inhabitants)
76 Km SE of Pisa (89158 inhabitants)
80 Km S of Pistoia (90315 inhabitants)
82 Km SE of Lucca (89046 inhabitants)
97 Km SE of Viareggio (62467 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 2024-02-18
03:21:45		 43.2225 11.0513 6 2024-02-18
03:54:05		 Sala Sismica INGV-Roma 125347651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-02-18 03:21:45 ± 0.11
Latitude 43.2225 ± 0.0054
Longitude 11.0513 ± 0.0099
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 125347651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 623
Semi-minor axis of confidence ellipse (meter) 523
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.19790
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 125347651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-02-18 03:54:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2024-02-18T03:22:33.19 3.0 undecidable manual S 2.58 0
IV.PLMA.HHE. 2024-02-18T03:22:08.78 0.3 undecidable manual P 314 132.9669 50 0.86 48
GU.EQUI.HHZ. 2024-02-18T03:22:07.96 3.0 undecidable manual P 0.74 0
MN.VLC.HHZ. 2024-02-18T03:22:06.13 3.0 undecidable manual P 0.18 0
IV.ATVO.HHZ. 2024-02-18T03:22:05.03 3.0 undecidable manual P -0.04 0
IV.LMD.HHZ. 2024-02-18T03:22:05.09 3.0 positive manual P 0.4 0
IV.PARC.HHZ. 2024-02-18T03:22:04.36 3.0 undecidable manual P -0.03 0
IV.ATMI.HHZ. 2024-02-18T03:22:03.21 3.0 positive manual P 0.12 0
IV.SFI.EHZ. 2024-02-18T03:22:03.10 3.0 undecidable manual P -0.03 0
IV.BDI.HHZ. 2024-02-18T03:22:03.04 3.0 positive manual P -0.24 0
IV.VMGN.HHZ. 2024-02-18T03:22:02.34 3.0 negative manual P 0.75 0
IV.SEI.HHZ. 2024-02-18T03:22:02.27 3.0 undecidable manual P -0.25 0
GU.CARD.HHN. 2024-02-18T03:22:02.84 0.1 undecidable manual P 333 100.2219 50 -0.04 87
GU.POPM.HHZ. 2024-02-18T03:22:02.30 3.0 positive manual P 0 0
IV.LATE.HHZ. 2024-02-18T03:22:02.23 0.1 undecidable manual P 138 91.1421 50 0.75 73
IV.RINC.EHZ. 2024-02-18T03:22:01.48 3.0 negative manual P 0.52 0
IV.CRE.HHZ. 2024-02-18T03:22:01.02 0.1 undecidable manual P 58 84.8484 50 0.51 81
IV.MGAB.HHZ. 2024-02-18T03:22:01.68 0.1 undecidable manual P 111 92.5407 50 -0.03 89
GU.MAIM.HHZ. 2024-02-18T03:22:01.02 3.0 negative manual P -0.37 0
IV.MPPT.EHE. 2024-02-18T03:22:00.10 0.1 undecidable manual P 2 81.5517 50 0.09 90
IV.RUFI.EHZ. 2024-02-18T03:22:00.03 3.0 negative manual P 0.5 0
IV.SACS.HHZ. 2024-02-18T03:21:59.87 0.1 undecidable manual P 120 80.9523 50 -0.05 90
IV.MCIV.CHZ. 2024-02-18T03:21:58.06 0.1 undecidable manual P 134 70.6737 50 -0.27 88
IV.CAFI.HHZ. 2024-02-18T03:21:58.51 0.1 positive manual P 81 74.8695 50 -0.46 84
TV.SF11.HHZ. 2024-02-18T03:21:57.03 0.1 undecidable manual P 127 64.2912 50 -0.31 88
IV.CRMI.HHZ. 2024-02-18T03:21:57.20 0.1 undecidable manual P 355 63.8916 50 -0.08 93
IV.OSSC.HHZ. 2024-02-18T03:21:57.47 0.6 undecidable manual S 25 36.9297 99 -0.83 39
IV.CSNT.HHZ. 2024-02-18T03:21:56.61 0.6 undecidable manual S 35 33.8439 100 -0.64 42
IV.RIBO.EHZ.01 2024-02-18T03:21:55.21 0.6 undecidable manual S 181 30.3474 101 -0.85 39
IV.ARCI.HHZ. 2024-02-18T03:21:55.13 1.0 undecidable manual P 140 53.6019 50 -0.57 21
IV.LOCA.HHZ. 2024-02-18T03:21:52.29 0.6 undecidable manual S 61 19.4694 107 -0.08 50
IV.OSSC.HHZ. 2024-02-18T03:21:52.69 0.1 positive manual P 25 36.9297 99 -0.13 96
IV.CSNT.HHZ. 2024-02-18T03:21:52.11 0.1 positive manual P 35 33.8439 100 -0.1 97
IV.RIBO.EHZ.01 2024-02-18T03:21:51.43 0.3 undecidable manual P 181 30.3474 101 -0.1 74
IV.TRIF.CHZ. 2024-02-18T03:21:51.29 0.6 undecidable manual S 225 16.9719 109 -0.26 49
IV.TRIF.CHZ. 2024-02-18T03:21:49.05 0.1 positive manual P 225 16.9719 109 0.12 100
IV.LOCA.HHZ. 2024-02-18T03:21:49.75 0.1 positive manual P 61 19.4694 107 0.35 95
IV.FROS.CHZ. 2024-02-18T03:21:49.31 0.6 undecidable manual S 99 8.5803 124 0.38 48
IV.FROS.CHZ. 2024-02-18T03:21:47.94 0.1 positive manual P 99 8.5803 124 0.53 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:2.7 0.0104 0.34 AML other m 2024-02-18T03:21:49.62
IV.FROS.CHN. ML:2.8 0.01125 0.38 AML other m 2024-02-18T03:21:49.49
IV.TRIF.CHE. ML:2.5 0.0029649999999999998 1.8 AML other m 2024-02-18T03:21:52.99
IV.LOCA.HHE. ML:2.4 0.00214 0.6 AML other m 2024-02-18T03:21:52.85
IV.LOCA.HNE. ML:2.4 0.00221 0.6 AML other m 2024-02-18T03:21:52.85
IV.LOCA.HNN. ML:2.5 0.00253 0.58 AML other m 2024-02-18T03:21:52.69
IV.LOCA.HHN. ML:2.5 0.002575 0.58 AML other m 2024-02-18T03:21:52.69
IV.TRIF.CHN. ML:2.4 0.00228 1.14 AML other m 2024-02-18T03:21:52.84
IV.RIBO.EHE.01 ML:2.4 0.00135 0.82 AML other m 2024-02-18T03:21:55.84
IV.CSNT.HHN. ML:1.9 0.0003785 0.22 AML other m 2024-02-18T03:21:56.70
IV.CSNT.HHE. ML:1.9 0.00035850000000000004 1.4 AML other m 2024-02-18T03:21:56.95
IV.ARCI.HHE. ML:1.5 0.00008129144000000001 1.16 AML other m 2024-02-18T03:22:03.42
IV.OSSC.HHN. ML:1.9 0.0003025 0.46 AML other m 2024-02-18T03:21:57.92
IV.OSSC.HHE. ML:1.9 0.00032450000000000003 0.2 AML other m 2024-02-18T03:21:57.70
IV.ARCI.HHN. ML:1.7 0.00011973220000000001 1.0192 AML other m 2024-02-18T03:22:04.38
TV.SF11.HHE. ML:1.8 0.00011232795000000001 1.8992 AML other m 2024-02-18T03:22:07.83
IV.RIBO.EHN.01 ML:2.3 0.0010295 0.44 AML other m 2024-02-18T03:21:58.86
GU.MAIM.HHE. ML:1.4 0.00003011859 5.08 AML other m 2024-02-18T03:22:13.60
IV.SACS.HHE. ML:1.3 0.00002985 1.1 AML other m 2024-02-18T03:22:03.23
IV.LATE.HHE. ML:1.7 0.00005595 1.42 AML other m 2024-02-18T03:22:05.81
IV.CRMI.HHN. ML:1.7 0.0000916 1.02 AML other m 2024-02-18T03:22:06.00
IV.LATE.HHN. ML:1.7 0.0000578 0.9 AML other m 2024-02-18T03:22:07.31
IV.CRMI.HHE. ML:1.6 0.00007374999999999999 1.2 AML other m 2024-02-18T03:22:08.33
IV.RUFI.EHN. ML:1.8 0.00009965 0.24 AML other m 2024-02-18T03:22:09.89
TV.SF11.HHN. ML:1.8 0.00010999999999999999 0.86 AML other m 2024-02-18T03:22:10.55
IV.CAFI.HHE. ML:1.5 0.0000517 0.78 AML other m 2024-02-18T03:22:11.00
IV.CAFI.HHN. ML:1.5 0.0000485 1.58 AML other m 2024-02-18T03:22:11.98
IV.RUFI.EHE. ML:1.7 0.00008065 0.72 AML other m 2024-02-18T03:22:11.83
IV.CRE.HHE. ML:1.8 0.00008975 0.6 AML other m 2024-02-18T03:22:12.17
IV.CRE.HHN. ML:1.8 0.00008740000000000001 1.24 AML other m 2024-02-18T03:22:13.80
IV.VMGN.HHE. ML:1.5 0.00003255 1.36 AML other m 2024-02-18T03:22:14.86
GU.MAIM.HHN. ML:1.6 0.00004285 1.5 AML other m 2024-02-18T03:22:15.14
IV.MGAB.HHN. ML:1.5 0.00003645 1.1 AML other m 2024-02-18T03:22:16.66
GU.POPM.HHE. ML:1.8 0.0000736 1.2 AML other m 2024-02-18T03:22:16.32
IV.RINC.EHE. ML:2.0 0.00011325 0.66 AML other m 2024-02-18T03:22:16.81
GU.POPM.HHN. ML:1.9 0.0000779 0.18 AML other m 2024-02-18T03:22:16.55
IV.RINC.EHN. ML:1.8 0.0000844 1.3 AML other m 2024-02-18T03:22:16.83
IV.ATMI.HHN. ML:2.1 0.00011965 0.58 AML other m 2024-02-18T03:22:17.65
IV.SACS.HHN. ML:1.3 0.0000257 0.8 AML other m 2024-02-18T03:22:17.85
IV.VMGN.HHN. ML:1.5 0.0000356 0.42 AML other m 2024-02-18T03:22:18.48
IV.BDI.HHE. ML:1.6 0.00004125 0.3 AML other m 2024-02-18T03:22:18.63
IV.MGAB.HHE. ML:1.5 0.000033600000000000004 1.2 AML other m 2024-02-18T03:22:19.63
IV.SEI.HHN. ML:2.3 0.0001975 0.36 AML other m 2024-02-18T03:22:19.26
IV.PARC.HHE. ML:1.4 0.000022499999999999998 0.4 AML other m 2024-02-18T03:22:19.52
IV.SEI.HHE. ML:1.9 0.0000901 0.98 AML other m 2024-02-18T03:22:20.64
IV.BDI.HHN. ML:1.6 0.00004015 1.02 AML other m 2024-02-18T03:22:20.88
GU.EQUI.HHN. ML:1.3 0.000014225 0.42 AML other m 2024-02-18T03:22:20.41
IV.LMD.HHE. ML:1.8 0.0000514 0.4 AML other m 2024-02-18T03:22:20.82
IV.LMD.HHN. ML:1.8 0.00005935 0.26 AML other m 2024-02-18T03:22:21.25
IV.ATMI.HHE. ML:2.1 0.00013800000000000002 0.8 AML other m 2024-02-18T03:22:21.28
IV.ATVO.HHE. ML:1.6 0.000030150000000000004 0.48 AML other m 2024-02-18T03:22:22.22
IV.PARC.HHN. ML:1.6 0.00003695 1.48 AML other m 2024-02-18T03:22:24.13
GU.EQUI.HHE. ML:1.3 0.000015949999999999998 1.44 AML other m 2024-02-18T03:22:26.09
IV.ATVO.HHN. ML:1.5 0.0000258 0.42 AML other m 2024-02-18T03:22:27.56
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