Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 17-01-2024 and time 20:05:51 (UTC) in region 1 km NW Onano (VT)

A magnitude ML 1.8 earthquake occured in region: 1 km NW Onano (VT), on

  • 17-01-2024 20:05:51 (UTC)
  • 17-01-2024 21:05:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7020, 11.8080 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
Onano VT 1 995 995
Grotte di Castro VT 6 2683 3678
Proceno VT 7 557 4235
Acquapendente VT 7 5506 9741
Gradoli VT 8 1353 11094
Sorano GR 8 3428 14522
San Lorenzo Nuovo VT 8 2091 16613
Latera VT 9 836 17449
Castell'Azzara GR 12 1476 18925
Pitigliano GR 14 3818 22743
Castel Giorgio TR 14 2131 24874
Valentano VT 15 2868 27742
Bolsena VT 16 3991 31733
Castel Viscardo TR 17 2938 34671
Ischia di Castro VT 18 2326 36997
Farnese VT 18 1527 38524
Allerona TR 18 1794 40318
Capodimonte VT 19 1731 42049
Piancastagnaio SI 19 4230 46279
San Casciano dei Bagni SI 20 1632 47911

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Viterbo (67173 inhabitants)
57 Km E of Grosseto (82087 inhabitants)
65 Km SW of Perugia (166134 inhabitants)
68 Km N of Civitavecchia (52991 inhabitants)
70 Km W of Terni (111501 inhabitants)
78 Km W of Foligno (57155 inhabitants)
79 Km SE of Siena (53903 inhabitants)
85 Km S of Arezzo (99543 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 2024-01-17
20:05:51		 42.7023 11.8083 6 2024-01-17
20:14:04		 Sala Sismica INGV-Roma 124701371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-01-17 20:05:51 ± 0.08
Latitude 42.7023 ± 0.0045
Longitude 11.8083 ± 0.0061
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 124701371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 407
Semi-minor axis of confidence ellipse (meter) 367
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.94519
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 124701371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-01-17 20:14:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BSSO.HHZ. 2024-01-17T20:06:26.28 3.0 undecidable manual Pn -0.19 0
IV.CAFI.HHZ. 2024-01-17T20:06:14.83 0.6 undecidable manual S 10 70.6737 50 0.4 42
IV.CESX.HHZ. 2024-01-17T20:06:12.63 0.3 undecidable manual S 99 64.3911 50 -0.1 68
IV.MML1.EHZ. 2024-01-17T20:06:10.16 0.3 undecidable manual P 64 104.9172 50 -0.04 64
IV.ATVO.HHZ. 2024-01-17T20:06:07.51 0.3 undecidable manual P 33 89.6436 50 -0.33 62
IV.CASP.HHN. 2024-01-17T20:06:06.54 0.3 undecidable manual P 278 77.4669 50 0.58 59
IV.LOCA.HHE. 2024-01-17T20:06:06.04 0.1 undecidable manual P 327 80.364 50 -0.36 83
IV.ASSB.HHN. 2024-01-17T20:06:05.89 1.0 undecidable manual P 61 78.7656 50 -0.27 21
IV.FROS.CHN. 2024-01-17T20:06:05.86 0.1 undecidable manual P 317 77.2671 50 -0.07 89
IV.TOLF.HHE. 2024-01-17T20:06:05.67 0.6 undecidable manual P 167 72.5718 50 0.48 41
IV.RIBO.EHE.01 2024-01-17T20:06:04.84 0.3 undecidable manual P 294 67.7766 50 0.38 64
IV.CAFI.HHZ. 2024-01-17T20:06:04.59 0.1 undecidable manual P 10 70.6737 50 -0.32 85
IV.CESX.HHZ. 2024-01-17T20:06:04.04 0.6 undecidable manual P 99 64.3911 50 0.1 45
IV.ARCI.HHZ. 2024-01-17T20:06:03.04 0.3 undecidable manual S 302 31.746 100 -0.08 72
TV.SF11.HHZ. 2024-01-17T20:05:59.46 0.6 undecidable manual S 330 21.2676 105 -0.09 49
IV.ARCI.HHZ. 2024-01-17T20:05:58.24 0.1 undecidable manual P 302 31.746 100 -0.14 95
IV.SACS.HHZ. 2024-01-17T20:05:58.94 0.3 undecidable manual S 27 18.2706 107 0.39 69
TV.SF11.HHZ. 2024-01-17T20:05:56.40 0.1 undecidable manual P 330 21.2676 105 0.08 98
IV.LATE.HHZ. 2024-01-17T20:05:55.82 0.6 undecidable manual S 182 9.879 120 -0.04 51
IV.SACS.HHZ. 2024-01-17T20:05:55.79 0.1 undecidable manual P 27 18.2706 107 0.04 100
IV.LATE.HHZ. 2024-01-17T20:05:54.10 0.1 undecidable manual P 182 9.879 120 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HNN. ML:0.0 0.00064309755 0.32 AML other m 2024-01-17T20:05:59.81
IV.SACS.HHN. ML:0.0 0.0005793163 0.32 AML other m 2024-01-17T20:05:59.81
TV.SF11.HHN. ML:2.0 0.0007959429 0.32 AML other m 2024-01-17T20:06:03.57
TV.SF11.HHE. ML:2.0 0.0007207597 0.2688 AML other m 2024-01-17T20:06:01.44
IV.SACS.HNE. ML:0.0 0.0005442184999999999 0.2816 AML other m 2024-01-17T20:06:04.29
IV.ARCI.HHE. ML:1.7 0.0002525 0.2 AML other m 2024-01-17T20:06:03.48
IV.SACS.HHE. ML:0.0 0.00050533455 0.256 AML other m 2024-01-17T20:06:00.24
IV.ARCI.HHN. ML:1.9 0.000361 0.16 AML other m 2024-01-17T20:06:04.31
IV.ARCI.HNN. ML:1.9 0.000347 0.16 AML other m 2024-01-17T20:06:04.31
IV.ARCI.HNE. ML:1.8 0.0002855 0.52 AML other m 2024-01-17T20:06:04.72
IV.CAFI.HHE. ML:1.6 0.00006759999999999999 0.62 AML other m 2024-01-17T20:06:15.60
IV.CAFI.HHN. ML:1.6 0.00005830000000000001 1.28 AML other m 2024-01-17T20:06:16.84
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