Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 29-09-2023 and time 03:06:47 (Italy) in region 3 km SE San Lorenzo Nuovo (VT)

A magnitude ML 2.1 earthquake occured in region: 3 km SE San Lorenzo Nuovo (VT), on

  • 29-09-2023 01:06:47 (UTC)
  • 29-09-2023 03:06:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6600, 11.9190 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 4 2683 4774
Gradoli VT 5 1353 6127
Bolsena VT 6 3991 10118
Castel Giorgio TR 7 2131 12249
Latera VT 8 836 13085
Onano VT 9 995 14080
Acquapendente VT 10 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 16 909 37704
Montefiascone VT 16 13432 51136
Orvieto TR 17 20630 71766
Sorano GR 17 3428 75194
Piansano VT 17 2079 77273
Allerona TR 18 1794 79067
Ischia di Castro VT 18 2326 81393
Farnese VT 20 1527 82920

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Viterbo (67173 inhabitants)
61 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)
87 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 2.1 2023-09-29
01:06:47		 42.6603 11.9192 4 2023-09-29
01:13:07		 Sala Sismica INGV-Roma 121564611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-29 01:06:47 ± 0.18
Latitude 42.6603 ± 0.0081
Longitude 11.9192 ± 0.0122
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 121564611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 850
Semi-minor axis of confidence ellipse (meter) 817
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 252
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86515
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 15
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 56
Type of magnitude ML
Reference to an origin 121564611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-29 01:13:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.IMI.HHZ. 2023-09-29T01:08:35.96 3.0 undecidable manual Sg 16.459999 0
IV.MCRV.HHZ. 2023-09-29T01:08:15.17 3.0 undecidable manual Sn -0.52 0
OX.DRE.HHZ. 2023-09-29T01:07:59.58 3.0 undecidable manual Pg 13.79 0
IV.MMO1.EHZ. 2023-09-29T01:07:24.93 3.0 undecidable manual S -0.25 0
IV.ATPI.EHZ. 2023-09-29T01:07:18.38 0.6 undecidable manual S 24 96.0261 50 1 35
IV.ATVO.HHZ. 2023-09-29T01:07:16.78 0.6 undecidable manual S 26 89.3439 50 1.2 32
IV.MURB.HHZ. 2023-09-29T01:07:14.52 0.6 undecidable manual S 36 82.9503 50 0.62 42
IV.ATMI.HHZ. 2023-09-29T01:07:13.29 0.6 undecidable manual S 21 79.9644 50 0.21 47
IV.CAFI.HHZ. 2023-09-29T01:07:10.86 0.6 undecidable manual S 3 74.2701 50 -0.72 41
IV.CSP1.EHZ. 2023-09-29T01:07:08.43 3.0 positive manual P 0.12 0
IV.PARC.HHZ. 2023-09-29T01:07:07.38 3.0 positive manual P -0.66 0
IV.CRE.HHZ. 2023-09-29T01:07:07.88 3.0 positive manual P 0.77 0
IV.SNTG.HHZ. 2023-09-29T01:07:07.36 3.0 undecidable manual P 0.59 0
IV.PIEI.HHZ. 2023-09-29T01:07:07.52 3.0 negative manual P 0.16 0
IV.FDMO.HHZ. 2023-09-29T01:07:06.50 3.0 positive manual P 0.06 0
IV.MOMA.HHZ. 2023-09-29T01:07:06.32 0.6 undecidable manual S 73 55.4001 50 -0.21 50
IV.MTCE.HHZ. 2023-09-29T01:07:06.56 3.0 negative manual P 0.42 0
IV.NRCA.HHZ. 2023-09-29T01:07:05.61 3.0 positive manual P -0.14 0
IV.ATPI.EHZ. 2023-09-29T01:07:04.94 1.0 negative manual P 24 96.0261 50 0.14 23
IV.BARO.EHZ. 2023-09-29T01:07:04.56 0.6 undecidable manual S 167 47.0196 94 0.58 46
IV.RIBO.EHZ.01 2023-09-29T01:07:03.22 3.0 negative manual P -0.1 0
IV.ATCC.EHZ. 2023-09-29T01:07:03.19 1.0 negative manual P 45 82.5507 50 0.46 22
IV.ATVO.HHZ. 2023-09-29T01:07:03.25 0.6 positive manual P 26 89.3439 50 -0.51 43
IV.ASSB.HHZ. 2023-09-29T01:07:01.67 0.3 undecidable manual P 55 73.5708 50 0.33 70
IV.ATMI.HHZ. 2023-09-29T01:07:01.62 0.6 undecidable manual P 21 79.9644 50 -0.7 41
IV.ARCI.HHZ. 2023-09-29T01:07:01.47 0.6 undecidable manual S 301 41.9247 95 -0.75 43
IV.MURB.HHZ. 2023-09-29T01:07:01.99 0.6 undecidable manual P 36 82.9503 50 -0.8 39
IV.CAFI.HHZ. 2023-09-29T01:07:00.32 0.6 undecidable manual P 3 74.2701 50 -1.13 34
IV.MGAB.HHZ. 2023-09-29T01:06:59.03 0.6 undecidable manual S 29 32.1456 96 0.2 52
IV.MOMA.HHZ. 2023-09-29T01:06:58.27 0.1 undecidable manual P 73 55.4001 50 -0.27 98
TV.SF11.HHZ. 2023-09-29T01:06:58.17 0.6 undecidable manual S 320 30.2475 97 -0.03 54
IV.CESX.HHZ. 2023-09-29T01:06:58.83 1.0 negative manual P 96 54.8007 50 0.38 24
IV.ARCI.HHZ. 2023-09-29T01:06:56.11 0.6 negative manual P 301 41.9247 95 0.06 52
IV.BARO.EHZ. 2023-09-29T01:06:56.48 1.0 undecidable manual P 167 47.0196 94 -0.58 23
IV.MCIV.CHZ. 2023-09-29T01:06:56.79 0.6 undecidable manual S 304 23.754 99 0.84 43
IV.SACS.HNZ. 2023-09-29T01:06:55.11 0.6 undecidable manual S 358 20.9679 100 0.12 54
TV.SF11.HHZ. 2023-09-29T01:06:53.53 1.0 undecidable manual P 320 30.2475 97 -0.2 26
IV.MGAB.HHZ. 2023-09-29T01:06:53.73 0.1 positive manual P 29 32.1456 96 -0.36 100
IV.MCIV.CHZ. 2023-09-29T01:06:52.86 0.3 negative manual P 304 23.754 99 0.43 75
IV.SACS.HNZ. 2023-09-29T01:06:51.99 0.6 negative manual P 358 20.9679 100 0.11 54
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HNN. ML:2.2 0.00128 0.24 AML other m 2023-09-29T01:06:55.80
IV.SACS.HHN. ML:2.2 0.0012900000000000001 1.42 AML other m 2023-09-29T01:06:56.74
IV.SACS.HHE. ML:2.5 0.002395 0.88 AML other m 2023-09-29T01:06:56.03
IV.SACS.HNE. ML:2.5 0.002445 0.9 AML other m 2023-09-29T01:06:56.03
IV.MCIV.CHE. ML:2.2 0.001092 0.4 AML other m 2023-09-29T01:06:57.71
IV.MCIV.CHN. ML:2.0 0.0007695000000000001 0.62 AML other m 2023-09-29T01:06:59.61
IV.MGAB.HNN. ML:2.5 0.001385 1.84 AML other m 2023-09-29T01:07:00.05
IV.MGAB.HHN. ML:2.5 0.0014849999999999998 1.84 AML other m 2023-09-29T01:07:00.05
TV.SF11.HHN. ML:2.5 0.001655 0.54 AML other m 2023-09-29T01:07:01.29
TV.SF11.HHE. ML:2.2 0.0008995 0.44 AML other m 2023-09-29T01:07:01.51
IV.MGAB.HHE. ML:2.4 0.0012335 0.32 AML other m 2023-09-29T01:07:01.25
IV.MGAB.HNE. ML:2.4 0.0010754999999999999 0.34 AML other m 2023-09-29T01:07:01.24
IV.ARCI.HHE. ML:1.9 0.000291 1.4 AML other m 2023-09-29T01:07:04.91
IV.ARCI.HHN. ML:1.8 0.00023850000000000002 0.88 AML other m 2023-09-29T01:07:04.98
IV.BARO.EHE. ML:1.3 0.0000617 0.98 AML other m 2023-09-29T01:07:05.85
IV.BARO.EHN. ML:1.9 0.00023400000000000002 0.24 AML other m 2023-09-29T01:07:06.69
IV.BARO.HNN. ML:1.9 0.00023249999999999999 0.7 AML other m 2023-09-29T01:07:06.69
IV.BARO.HNE. ML:2.0 0.000308 1.12 AML other m 2023-09-29T01:07:06.85
IV.MOMA.HHN. ML:2.1 0.00028500000000000004 0.94 AML other m 2023-09-29T01:07:08.92
IV.CESX.HHN. ML:1.8 0.00015450000000000001 0.74 AML other m 2023-09-29T01:07:09.70
IV.MOMA.HNE. ML:2.2 0.0003725 0.46 AML other m 2023-09-29T01:07:09.73
IV.MOMA.HNN. ML:2.2 0.00033099999999999997 0.82 AML other m 2023-09-29T01:07:10.59
IV.CESX.HHE. ML:1.8 0.0001495 0.48 AML other m 2023-09-29T01:07:10.32
IV.MOMA.HHE. ML:2.2 0.000393 0.24 AML other m 2023-09-29T01:07:10.72
IV.CAFI.HHE. ML:2.0 0.0001635 0.26 AML other m 2023-09-29T01:07:13.23
IV.CAFI.HHN. ML:1.8 0.00011249999999999998 0.94 AML other m 2023-09-29T01:07:13.75
IV.ASSB.HHN. ML:1.9 0.00013700000000000002 1.38 AML other m 2023-09-29T01:07:15.98
IV.ATMI.HHN. ML:2.7 0.0006475 0.56 AML other m 2023-09-29T01:07:15.62
IV.ATVO.HHE. ML:2.2 0.000192 0.52 AML other m 2023-09-29T01:07:17.24
IV.MURB.HHE. ML:2.7 0.0006590000000000001 0.28 AML other m 2023-09-29T01:07:17.14
IV.MURB.HHN. ML:2.7 0.0006490000000000001 0.26 AML other m 2023-09-29T01:07:17.20
IV.ATCC.EHN. ML:2.3 0.00027350000000000003 0.6 AML other m 2023-09-29T01:07:18.40
IV.ASSB.HHE. ML:1.9 0.000135 0.46 AML other m 2023-09-29T01:07:18.43
IV.ATMI.HHE. ML:2.6 0.0005560000000000001 0.4 AML other m 2023-09-29T01:07:18.29
IV.ATVO.HHN. ML:2.2 0.0001805 0.28 AML other m 2023-09-29T01:07:19.07
IV.NRCA.HHN. ML:1.9 0.00007819999999999999 0.72 AML other m 2023-09-29T01:07:20.88
IV.ATPI.EHN. ML:2.2 0.00014850000000000003 1.46 AML other m 2023-09-29T01:07:20.99
IV.ATPI.EHE. ML:2.0 0.00010819999999999999 0.48 AML other m 2023-09-29T01:07:21.00
IV.ATCC.EHE. ML:2.3 0.000284 0.48 AML other m 2023-09-29T01:07:21.80
IV.MTCE.HHE. ML:1.6 0.0000421 0.48 AML other m 2023-09-29T01:07:21.61
IV.MTCE.HHN. ML:1.6 0.0000461 0.84 AML other m 2023-09-29T01:07:21.31
IV.NRCA.HHE. ML:1.9 0.0000756 1.46 AML other m 2023-09-29T01:07:22.85
IV.CRE.HHN. ML:1.8 0.000058450000000000005 0.7 AML other m 2023-09-29T01:07:22.33
IV.FDMO.HHE. ML:1.9 0.00007730000000000001 1.72 AML other m 2023-09-29T01:07:23.95
IV.FDMO.HHN. ML:1.8 0.00006615 0.66 AML other m 2023-09-29T01:07:23.26
IV.CRE.HHE. ML:1.6 0.000042300000000000005 0.8 AML other m 2023-09-29T01:07:23.28
IV.PIEI.HHN. ML:1.9 0.00006989999999999999 0.32 AML other m 2023-09-29T01:07:23.81
IV.PIEI.HHE. ML:2.0 0.00008565000000000001 0.94 AML other m 2023-09-29T01:07:25.08
IV.SNTG.HHE. ML:1.9 0.0000812 0.94 AML other m 2023-09-29T01:07:25.85
IV.MMO1.EHN. ML:2.3 0.000153 0.92 AML other m 2023-09-29T01:07:26.74
IV.CSP1.EHE. ML:2.4 0.00020150000000000002 1.52 AML other m 2023-09-29T01:07:27.05
IV.PARC.HHN. ML:1.8 0.0000552 0.92 AML other m 2023-09-29T01:07:27.05
IV.SNTG.HHN. ML:1.9 0.000075 0.62 AML other m 2023-09-29T01:07:27.24
IV.CSP1.EHN. ML:2.3 0.00016599999999999997 0.74 AML other m 2023-09-29T01:07:27.72
IV.PARC.HHE. ML:1.9 0.0000591 0.74 AML other m 2023-09-29T01:07:28.13
IV.MMO1.EHE. ML:2.1 0.00010345 1.34 AML other m 2023-09-29T01:07:29.97
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