Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 28-09-2023 and time 19:49:05 (Italy) in region 3 km SE San Lorenzo Nuovo (VT)

A magnitude ML 2.4 earthquake occured in region: 3 km SE San Lorenzo Nuovo (VT), on

  • 28-09-2023 17:49:05 (UTC)
  • 28-09-2023 19:49:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6600, 11.9240 at 4 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
San Lorenzo Nuovo VT 3 2091 2091
Grotte di Castro VT 5 2683 4774
Bolsena VT 6 3991 8765
Gradoli VT 6 1353 10118
Castel Giorgio TR 7 2131 12249
Latera VT 9 836 13085
Onano VT 10 995 14080
Acquapendente VT 11 5506 19586
Capodimonte VT 12 1731 21317
Castel Viscardo TR 13 2938 24255
Valentano VT 13 2868 27123
Proceno VT 13 557 27680
Marta VT 14 3499 31179
Bagnoregio VT 15 3650 34829
Porano TR 15 1966 36795
Lubriano VT 15 909 37704
Montefiascone VT 16 13432 51136
Orvieto TR 17 20630 71766
Sorano GR 17 3428 75194
Piansano VT 18 2079 77273
Allerona TR 18 1794 79067
Ischia di Castro VT 19 2326 81393
Celleno VT 20 1355 82748

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Viterbo (67173 inhabitants)
60 Km W of Terni (111501 inhabitants)
63 Km SW of Perugia (166134 inhabitants)
64 Km N of Civitavecchia (52991 inhabitants)
67 Km E of Grosseto (82087 inhabitants)
72 Km W of Foligno (57155 inhabitants)
88 Km SE of Siena (53903 inhabitants)
90 Km S of Arezzo (99543 inhabitants)
97 Km NW of Roma (2864731 inhabitants)
99 Km NW of Guidonia Montecelio (88673 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 2.4 2023-09-28
17:49:05		 42.6598 11.9238 4 2023-09-28
18:00:38		 Sala Sismica INGV-Roma 121551031
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-28 17:49:05 ± 0.12
Latitude 42.6598 ± 0.0054
Longitude 11.9238 ± 0.0086
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121551031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 593
Semi-minor axis of confidence ellipse (meter) 580
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 4
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.06390
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 18
Magnitude information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 76
Type of magnitude ML
Reference to an origin 121551031
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-28 18:00:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZEN8.HNZ. 2023-09-28T17:50:38.91 3.0 undecidable manual Sg 3.94 0
GU.RNCA.HHZ. 2023-09-28T17:50:02.49 3.0 negative manual Pg 10.25 0
IV.PESA.HHZ. 2023-09-28T17:49:55.97 3.0 undecidable manual S 2.07 0
IV.ZEN8.EHZ. 2023-09-28T17:49:54.79 3.0 undecidable manual Pn -1 0
IV.SFI.EHZ. 2023-09-28T17:49:47.60 3.0 undecidable manual S -1.91 0
IV.LMD.HHZ. 2023-09-28T17:49:32.39 3.0 undecidable manual P -0.37 0
IV.MOCL.EHZ. 2023-09-28T17:49:31.50 3.0 undecidable manual P -1.73 0
IV.ATCC.EHZ. 2023-09-28T17:49:31.62 0.6 undecidable manual S 45 82.3509 50 0.31 44
IV.MURB.HHZ. 2023-09-28T17:49:31.99 0.3 undecidable manual S 36 82.7505 50 0.56 62
IV.ATMI.HHZ. 2023-09-28T17:49:30.36 1.0 undecidable manual S 20 79.8645 50 -0.28 22
IV.SFI.EHZ. 2023-09-28T17:49:28.90 3.0 negative manual P -1.35 0
IV.CAFI.HHZ. 2023-09-28T17:49:28.48 0.6 undecidable manual S -2.94 0.9
IV.MF5.EHZ. 2023-09-28T17:49:28.74 3.0 undecidable manual P -0.06 0
IV.MPAG.EHZ. 2023-09-28T17:49:27.12 3.0 undecidable manual P -1.43 0
IV.CSP1.EHZ. 2023-09-28T17:49:26.06 3.0 positive manual P -0.21 0
IV.SMA1.EHZ. 2023-09-28T17:49:26.97 3.0 positive manual P 0.62 0
IV.NARO.HHZ. 2023-09-28T17:49:26.10 0.1 undecidable manual P 27 118.0929 50 0.27 82
IV.FRON.EHZ. 2023-09-28T17:49:25.24 1.0 undecidable manual P 34 115.1958 50 -0.15 21
IV.PARC.HHZ. 2023-09-28T17:49:24.60 3.0 undecidable manual P -1.74 0
IV.PIEI.HHZ. 2023-09-28T17:49:24.61 0.1 undecidable manual P 27 109.0131 50 0.18 86
IV.FDMO.HHZ. 2023-09-28T17:49:24.02 3.0 positive manual P -0.37 0
IV.MOMA.HHZ. 2023-09-28T17:49:24.36 0.6 undecidable manual S 73 55.0005 50 0.34 46
IV.MML1.EHZ. 2023-09-28T17:49:23.20 3.0 positive manual P -0.46 0
IV.ATPI.EHZ. 2023-09-28T17:49:22.06 1.0 negative manual P 24 95.9262 50 -0.35 21
IV.NRCA.HHZ. 2023-09-28T17:49:22.87 3.0 positive manual P -0.73 0
IV.BARO.EHZ. 2023-09-28T17:49:22.00 0.6 undecidable manual S 167 46.8198 95 0.38 46
IV.CESI.HHZ. 2023-09-28T17:49:22.62 3.0 positive manual P 0.72 0
IV.LNSS.HHZ. 2023-09-28T17:49:21.96 3.0 undecidable manual P -0.39 0
IV.CASP.HHZ. 2023-09-28T17:49:21.92 3.0 negative manual P -1.21 0
IV.ATVO.HHZ. 2023-09-28T17:49:20.85 0.6 positive manual P 26 89.1441 50 -0.52 41
IV.MURB.HHZ. 2023-09-28T17:49:20.25 0.3 negative manual P 36 82.7505 50 -0.14 68
IV.RIBO.EHZ. 2023-09-28T17:49:20.01 0.6 undecidable manual P 294 78.2661 50 0.32 44
IV.ATCC.EHZ. 2023-09-28T17:49:19.94 1.0 undecidable manual P 45 82.3509 50 -0.37 22
IV.ARCI.HHZ. 2023-09-28T17:49:19.74 0.6 undecidable manual S 300 42.3243 95 -0.3 47
IV.ATMI.HHZ. 2023-09-28T17:49:19.17 0.6 positive manual P 20 79.8645 50 -0.76 38
IV.ASSB.HHZ. 2023-09-28T17:49:18.54 0.3 negative manual P 54 73.2711 50 -0.38 66
IV.MGAB.HHZ. 2023-09-28T17:49:16.56 0.6 undecidable manual S 29 31.9458 97 0.09 50
IV.MOMA.HHZ. 2023-09-28T17:49:15.35 0.6 positive manual P 73 55.0005 50 -0.75 40
TV.SF11.HHZ. 2023-09-28T17:49:15.23 0.6 undecidable manual S 319 30.5472 97 -0.76 42
IV.BARO.EHZ. 2023-09-28T17:49:14.62 0.3 positive manual P 167 46.8198 95 -0.1 74
IV.MCIV.CHZ. 2023-09-28T17:49:14.15 0.6 undecidable manual S 303 24.0537 99 0.38 48
IV.SACS.HHZ. 2023-09-28T17:49:13.13 0.6 undecidable manual S 357 21.0678 101 0.41 48
IV.ARCI.HHZ. 2023-09-28T17:49:13.58 0.1 negative manual P 300 42.3243 95 -0.23 96
TV.SF11.HHZ. 2023-09-28T17:49:11.51 1.0 undecidable manual P 319 30.5472 97 0.04 26
IV.MGAB.HHZ. 2023-09-28T17:49:11.47 0.1 positive manual P 29 31.9458 97 -0.28 97
IV.MCIV.CHZ. 2023-09-28T17:49:10.65 0.1 positive manual P 303 24.0537 99 0.46 95
IV.SACS.HHZ. 2023-09-28T17:49:09.81 0.1 positive manual P 357 21.0678 101 0.23 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HHE. ML:3.1 0.009190000000000002 0.72 AML other m 2023-09-28T17:49:13.67
IV.SACS.HNE. ML:3.1 0.009035 0.72 AML other m 2023-09-28T17:49:13.67
IV.SACS.HHN. ML:2.7 0.004070000000000001 1.08 AML other m 2023-09-28T17:49:15.61
IV.SACS.HNN. ML:2.7 0.003905 1.06 AML other m 2023-09-28T17:49:15.60
IV.MCIV.CHN. ML:2.5 0.0021000000000000003 0.58 AML other m 2023-09-28T17:49:15.80
TV.SF11.HHN. ML:2.9 0.00363 0.36 AML other m 2023-09-28T17:49:16.65
TV.SF11.HHE. ML:2.7 0.0025250000000000003 0.26 AML other m 2023-09-28T17:49:17.66
IV.MGAB.HNN. ML:2.8 0.0027 0.2 AML other m 2023-09-28T17:49:17.60
IV.MGAB.HHN. ML:2.8 0.002885 1.02 AML other m 2023-09-28T17:49:17.60
IV.MCIV.CHE. ML:2.6 0.00246 1.46 AML other m 2023-09-28T17:49:18.85
IV.MGAB.HHE. ML:2.8 0.0028399999999999996 0.74 AML other m 2023-09-28T17:49:19.68
IV.MGAB.HNE. ML:2.8 0.00265 0.74 AML other m 2023-09-28T17:49:19.68
IV.ARCI.HHE. ML:2.3 0.0005989999999999999 1.32 AML other m 2023-09-28T17:49:21.18
IV.ARCI.HHN. ML:2.2 0.0005449999999999999 0.84 AML other m 2023-09-28T17:49:23.92
IV.BARO.EHE. ML:1.2 0.000051750000000000004 0.34 AML other m 2023-09-28T17:49:23.93
IV.BARO.HNE. ML:2.2 0.00046199999999999995 1.58 AML other m 2023-09-28T17:49:24.15
IV.MOMA.HNE. ML:2.4 0.000632 0.44 AML other m 2023-09-28T17:49:25.84
IV.MOMA.HNN. ML:2.4 0.0006445 0.96 AML other m 2023-09-28T17:49:25.43
IV.MOMA.HHN. ML:2.3 0.00053 0.98 AML other m 2023-09-28T17:49:26.81
IV.MOMA.HHE. ML:2.5 0.000713 0.82 AML other m 2023-09-28T17:49:27.56
IV.BARO.EHN. ML:2.1 0.00040149999999999995 0.36 AML other m 2023-09-28T17:49:28.39
IV.BARO.HNN. ML:2.2 0.0004345 0.38 AML other m 2023-09-28T17:49:28.39
IV.CAFI.HHE. ML:2.6 0.0006590000000000001 0.2 AML other m 2023-09-28T17:49:29.11
IV.CAFI.HNE. ML:2.6 0.00061 0.18 AML other m 2023-09-28T17:49:29.12
IV.CAFI.HNN. ML:2.4 0.0004335 0.78 AML other m 2023-09-28T17:49:29.57
IV.CAFI.HHN. ML:2.5 0.000458 0.8 AML other m 2023-09-28T17:49:29.57
IV.ASSB.HHE. ML:2.2 0.0002455 0.56 AML other m 2023-09-28T17:49:31.35
IV.ASSB.HHN. ML:2.2 0.000254 0.64 AML other m 2023-09-28T17:49:33.59
IV.LMD.HHN. ML:2.5 0.0001555 0.12 AML other m 2023-09-28T17:49:33.29
IV.LMD.HHE. ML:2.3 0.0000939 0.3 AML other m 2023-09-28T17:49:33.29
IV.RIBO.EHE.01 ML:2.2 0.000242 0.74 AML other m 2023-09-28T17:49:33.11
IV.ATMI.HHN. ML:3.0 0.0013599999999999999 1.44 AML other m 2023-09-28T17:49:33.27
IV.ATCC.HNE. ML:2.6 0.000624 1.18 AML other m 2023-09-28T17:49:34.40
IV.ATCC.EHE. ML:2.6 0.0006075000000000001 0.78 AML other m 2023-09-28T17:49:34.01
IV.MURB.HNN. ML:3.1 0.00183 0.92 AML other m 2023-09-28T17:49:34.88
IV.MURB.HHN. ML:3.2 0.002165 0.9 AML other m 2023-09-28T17:49:34.87
IV.ATVO.HHE. ML:2.6 0.000463 1.38 AML other m 2023-09-28T17:49:35.04
IV.MURB.HHE. ML:3.2 0.00216 0.32 AML other m 2023-09-28T17:49:35.26
IV.MURB.HNE. ML:3.2 0.002175 0.84 AML other m 2023-09-28T17:49:35.27
IV.ATMI.HHE. ML:3.1 0.0017599999999999998 1.36 AML other m 2023-09-28T17:49:35.27
IV.CASP.HHN. ML:2.1 0.00014500000000000003 1.08 AML other m 2023-09-28T17:49:36.30
IV.ATVO.HHN. ML:2.4 0.0002675 0.42 AML other m 2023-09-28T17:49:36.75
IV.RIBO.EHN.01 ML:2.1 0.0001915 1.24 AML other m 2023-09-28T17:49:36.77
IV.ATCC.HNN. ML:2.6 0.0005355000000000001 0.48 AML other m 2023-09-28T17:49:37.29
IV.NRCA.HHN. ML:2.2 0.000144 0.1 AML other m 2023-09-28T17:49:37.19
IV.CASP.HHE. ML:1.9 0.00009540000000000001 0.38 AML other m 2023-09-28T17:49:37.34
IV.ATCC.EHN. ML:2.6 0.0005600000000000001 1.54 AML other m 2023-09-28T17:49:37.08
IV.CESI.HHE. ML:2.2 0.0001785 0.34 AML other m 2023-09-28T17:49:37.92
IV.ATPI.EHN. ML:2.5 0.00034599999999999995 0.42 AML other m 2023-09-28T17:49:38.34
IV.CESI.HHN. ML:2.4 0.00032950000000000004 0.42 AML other m 2023-09-28T17:49:38.44
IV.ATPI.EHE. ML:2.5 0.00034899999999999997 0.52 AML other m 2023-09-28T17:49:38.42
IV.LNSS.HHE. ML:2.4 0.00027949999999999996 0.52 AML other m 2023-09-28T17:49:39.20
IV.FDMO.HHN. ML:2.2 0.0001655 1.42 AML other m 2023-09-28T17:49:40.83
IV.LNSS.HHN. ML:2.4 0.0003075 0.74 AML other m 2023-09-28T17:49:40.57
IV.MML1.EHE. ML:2.4 0.000225 1.42 AML other m 2023-09-28T17:49:41.11
IV.PIEI.HHN. ML:2.3 0.000177 0.62 AML other m 2023-09-28T17:49:41.20
IV.PIEI.HHE. ML:2.4 0.0002195 0.76 AML other m 2023-09-28T17:49:41.26
IV.FDMO.HHE. ML:2.2 0.0001395 0.72 AML other m 2023-09-28T17:49:42.33
IV.SMA1.EHE. ML:2.8 0.0004665 1.6 AML other m 2023-09-28T17:49:43.15
IV.NARO.HHN. ML:2.1 0.00009265 0.98 AML other m 2023-09-28T17:49:44.57
IV.NRCA.HHE. ML:2.2 0.000154 1.12 AML other m 2023-09-28T17:49:44.05
IV.SMA1.EHN. ML:2.4 0.00020400000000000003 1.1 AML other m 2023-09-28T17:49:44.11
IV.CSP1.EHE. ML:2.9 0.0006105 0.54 AML other m 2023-09-28T17:49:45.30
IV.NARO.HHE. ML:2.1 0.0000932 0.54 AML other m 2023-09-28T17:49:45.04
IV.PARC.HHN. ML:2.4 0.0001855 0.92 AML other m 2023-09-28T17:49:45.51
IV.CSP1.EHN. ML:2.7 0.000441 0.64 AML other m 2023-09-28T17:49:45.63
IV.FRON.EHN. ML:2.4 0.0002125 0.68 AML other m 2023-09-28T17:49:45.18
IV.FRON.EHE. ML:2.3 0.0001565 0.4 AML other m 2023-09-28T17:49:45.40
IV.MML1.EHN. ML:2.1 0.000122 0.88 AML other m 2023-09-28T17:49:45.19
IV.PARC.HHE. ML:2.4 0.0001955 1.56 AML other m 2023-09-28T17:49:45.90
IV.MPAG.EHN. ML:2.2 0.0001095 0.52 AML other m 2023-09-28T17:49:47.33
IV.MPAG.EHE. ML:2.1 0.00008705 0.86 AML other m 2023-09-28T17:49:48.86
IV.MF5.EHN. ML:2.5 0.00021300000000000003 1.32 AML other m 2023-09-28T17:49:48.32
IV.SFI.EHN. ML:2.0 0.00006185 0.56 AML other m 2023-09-28T17:49:49.81
IV.SFI.EHE. ML:2.1 0.00006785 1.12 AML other m 2023-09-28T17:49:52.88
IV.MF5.EHE. ML:2.4 0.0001795 0.5 AML other m 2023-09-28T17:49:55.29
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
Waveforms Seismic signals in miniseed + resp format Download