Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 29-11-2023 and time 11:51:24 (UTC) in region 1 km NE Massa Martana (PG)

A magnitude ML 1.7 earthquake occured in region: 1 km NE Massa Martana (PG), on

  • 29-11-2023 11:51:24 (UTC)
  • 29-11-2023 12:51:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7840, 12.5280 at 8 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
Massa Martana PG 1 3770 3770
Giano dell'Umbria PG 7 3846 7616
Todi PG 10 16851 24467
Acquasparta TR 10 4778 29245
Castel Ritaldi PG 13 3278 32523
Gualdo Cattaneo PG 14 6155 38678
Collazzone PG 14 3473 42151
Montecastrilli TR 15 5022 47173
Fratta Todina PG 16 1839 49012
Monte Castello di Vibio PG 16 1567 50579
Montefalco PG 16 5679 56258
Avigliano Umbro TR 16 2558 58816
Bevagna PG 18 5081 63897
Spoleto PG 18 38218 102115
San Gemini TR 19 5018 107133

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SW of Foligno (57155 inhabitants)
27 Km NW of Terni (111501 inhabitants)
38 Km SE of Perugia (166134 inhabitants)
53 Km NE of Viterbo (67173 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
89 Km N of Guidonia Montecelio (88673 inhabitants)
92 Km SE of Arezzo (99543 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
97 Km W of Teramo (54892 inhabitants)
98 Km NE of Civitavecchia (52991 inhabitants)
99 Km N of Roma (2864731 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 1.7 2023-11-29
11:51:24		 42.7842 12.5285 8 2023-11-29
11:58:20		 Sala Sismica INGV-Roma 123555451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-11-29 11:51:24 ± 0.06
Latitude 42.7842 ± 0.0036
Longitude 12.5285 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123555451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 432
Semi-minor axis of confidence ellipse (meter) 315
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 50
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.58276
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 123555451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-11-29 11:58:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCI.EHZ. 2023-11-29T11:52:12.25 3.0 undecidable manual Sn -0.64 0
IV.RIBO.EHZ.01 2023-11-29T11:52:02.01 3.0 undecidable manual S 0.92 0
IV.SSFR.HHZ. 2023-11-29T11:51:45.33 3.0 undecidable manual P 0
IV.NRCA.HHZ. 2023-11-29T11:51:40.03 0.6 undecidable manual S 83 48.0186 50 0.15 46
IV.LNSS.HHZ. 2023-11-29T11:51:39.43 0.6 undecidable manual S 116 46.3203 50 -0.01 48
IV.MGAB.HHZ. 2023-11-29T11:51:36.77 0.3 undecidable manual S 293 36.741 50 -0.11 72
IV.ATLO.HNN. 2023-11-29T11:51:35.45 0.6 undecidable manual P 351 59.6958 50 0.47 42
IV.RM33.EHZ. 2023-11-29T11:51:35.45 0.3 undecidable manual P 118 63.7917 50 -0.16 67
IV.GAVE.EHZ. 2023-11-29T11:51:35.13 0.6 undecidable manual S 109 31.5462 105 -0.18 47
IV.CSP1.EHZ. 2023-11-29T11:51:35.84 0.3 undecidable manual P 58 64.6908 50 0.1 68
IV.ASSB.HHZ. 2023-11-29T11:51:34.89 0.6 undecidable manual S 20 30.5472 105 -0.11 48
IV.ATVA.EHN. 2023-11-29T11:51:34.17 0.6 undecidable manual P 340 58.2972 50 -0.59 41
IV.ATCC.HNE. 2023-11-29T11:51:33.21 0.3 undecidable manual P 11 45.4212 50 0.44 66
IV.SACS.HHZ. 2023-11-29T11:51:33.62 0.3 undecidable manual P 278 50.9157 50 0 71
IV.NRCA.HHZ. 2023-11-29T11:51:33.02 0.3 positive manual P 83 48.0186 50 -0.15 70
IV.MML1.EHZ. 2023-11-29T11:51:33.91 0.6 undecidable manual P 44 51.3153 50 0.23 45
IV.LNSS.HHZ. 2023-11-29T11:51:32.79 0.3 positive manual P 116 46.3203 50 -0.13 70
IV.CESX.HHZ. 2023-11-29T11:51:31.53 0.6 undecidable manual S 166 20.0688 113 -0.02 50
IV.MGAB.HHZ. 2023-11-29T11:51:31.30 0.3 positive manual P 293 36.741 50 -0.14 71
IV.CESI.HNN. 2023-11-29T11:51:31.72 0.6 undecidable manual P 51 39.1275 50 -0.09 48
IV.ARRO.EHZ. 2023-11-29T11:51:30.52 0.6 undecidable manual P 140 29.8479 106 0.3 46
IV.ASSB.HHZ. 2023-11-29T11:51:30.20 0.3 undecidable manual P 20 30.5472 105 -0.15 72
IV.GAVE.EHZ. 2023-11-29T11:51:30.38 0.3 undecidable manual P 109 31.5462 105 -0.16 72
IV.CESX.HHZ. 2023-11-29T11:51:28.48 0.3 undecidable manual P 166 20.0688 113 0.12 74
IT.GNU.HGZ. 2023-11-29T11:51:27.12 0.3 undecidable manual S 57 3.996 154 -0.1 76
IV.MOMA.HHZ. 2023-11-29T11:51:27.07 0.3 undecidable manual S 57 3.996 154 -0.15 75
IV.MOMA.HHZ. 2023-11-29T11:51:26.06 0.1 undecidable manual P 57 3.996 154 0.2 99
IT.GNU.HGZ. 2023-11-29T11:51:26.02 0.1 undecidable manual P 57 3.996 154 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHE. ML:1.7 0.000375 1.5 AML other m 2023-11-29T11:51:32.76
IV.CESX.HHN. ML:1.7 0.00034599999999999995 0.58 AML other m 2023-11-29T11:51:32.01
IV.GAVE.EHE. ML:1.6 0.0001795 0.2 AML other m 2023-11-29T11:51:36.24
IV.GAVE.EHN. ML:1.5 0.0001385 0.5 AML other m 2023-11-29T11:51:36.81
IV.MGAB.HHN. ML:1.7 0.00019600000000000002 0.3 AML other m 2023-11-29T11:51:37.59
IV.MGAB.HHE. ML:1.6 0.0001615 0.42 AML other m 2023-11-29T11:51:38.09
IV.NRCA.HHN. ML:1.5 0.000096 1.88 AML other m 2023-11-29T11:51:40.97
IV.NRCA.HHE. ML:1.6 0.00009775 0.68 AML other m 2023-11-29T11:51:42.20
IV.MURB.HHE. ML:1.9 0.000191 0.56 AML other m 2023-11-29T11:51:43.55
IV.MURB.HHN. ML:1.9 0.0001865 0.28 AML other m 2023-11-29T11:51:44.14
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