Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 24-03-2023 and time 10:18:39 (UTC) in region 5 km NW Massa Martana (PG)

A magnitude ML 1.7 earthquake occured in region: 5 km NW Massa Martana (PG), on

  • 24-03-2023 10:18:39 (UTC)
  • 24-03-2023 11:18:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8190, 12.4980 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 5 3770 3770
Giano dell'Umbria PG 7 3846 7616
Todi PG 8 16851 24467
Collazzone PG 10 3473 27940
Gualdo Cattaneo PG 11 6155 34095
Fratta Todina PG 12 1839 35934
Monte Castello di Vibio PG 12 1567 37501
Castel Ritaldi PG 14 3278 40779
Acquasparta TR 15 4778 45557
Montefalco PG 15 5679 51236
Bevagna PG 16 5081 56317
Marsciano PG 16 18902 75219
Montecastrilli TR 19 5022 80241
Avigliano Umbro TR 19 2558 82799
Deruta PG 19 9669 92468
San Venanzo TR 20 2218 94686

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Foligno (57155 inhabitants)
31 Km NW of Terni (111501 inhabitants)
33 Km S of Perugia (166134 inhabitants)
55 Km NE of Viterbo (67173 inhabitants)
88 Km SE of Arezzo (99543 inhabitants)
90 Km NW of L'Aquila (69753 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
99 Km NE of Civitavecchia (52991 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
Bulletin
Rev1000 		ML 1.7 2023-03-24
10:18:39		 42.8193 12.4978 8 2024-03-01
17:18:02		 Bollettino Sismico Italiano INGV 116275071
Reviewed
Rev100 		ML 1.8 2023-03-24
10:18:39		 42.8223 12.4962 8 2023-03-24
10:30:54		 Sala Sismica INGV-Roma 115689521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-24 10:18:39 ± 0.05
Latitude 42.8193 ± 0.0027
Longitude 12.4978 ± 0.0037
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116275071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 357
Semi-minor axis of confidence ellipse (meter) 254
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 224
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.84986
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 116275071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-20 17:04:34

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 34
Type of magnitude ML
Reference to an origin 115689521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-24 10:30:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GRAM.HHZ. 2023-03-24T10:19:48.17 3.0 undecidable manual Sn -0.96 0
IV.FNVD.HHZ. 2023-03-24T10:19:31.76 3.0 undecidable manual Sn 0.97 0
IV.RCAV.EHZ. 2023-03-24T10:19:10.78 3.0 undecidable manual S -3.98 0
IV.EL6.EHZ. 2023-03-24T10:19:02.88 0.6 undecidable manual S 41 74.7696 50 0.86 36
IV.RM33.EHZ. 2023-03-24T10:19:00.50 0.6 undecidable manual S 120 67.8765 50 0.34 44
IV.PARC.HHZ. 2023-03-24T10:18:56.08 0.6 undecidable manual P 347 94.3389 50 0.77 36
IV.SACS.HHZ. 2023-03-24T10:18:55.00 0.6 undecidable manual S 274 47.9187 50 0.14 48
IV.MURB.HNE. 2023-03-24T10:18:55.30 0.6 undecidable manual S 3 49.2174 50 0.1 48
IV.NRCA.HHZ. 2023-03-24T10:18:55.40 0.6 undecidable manual S 88 50.2164 50 -0.05 48
IV.LNSS.HHZ. 2023-03-24T10:18:55.60 0.6 undecidable manual S 118 50.3163 50 0.12 48
IV.ATCC.EHE. 2023-03-24T10:18:53.20 0.6 undecidable manual S 16 42.1245 50 -0.11 48
IV.SMA1.EHZ. 2023-03-24T10:18:52.24 0.3 undecidable manual P 107 71.373 50 0.47 64
IV.CESI.HHZ. 2023-03-24T10:18:52.10 0.6 undecidable manual S 58 38.9277 50 -0.34 46
IV.EL6.EHZ. 2023-03-24T10:18:52.25 0.6 undecidable manual P 41 74.7696 50 -0.04 46
IV.GAVE.EHE. 2023-03-24T10:18:51.30 0.6 undecidable manual S 113 35.2425 50 -0.16 49
IV.CAFI.HHZ. 2023-03-24T10:18:51.57 0.3 undecidable manual P 323 71.0733 50 -0.15 68
IV.ATMI.HHZ. 2023-03-24T10:18:50.08 0.1 undecidable manual P 342 60.0954 50 0.05 95
IV.MGAB.HHZ. 2023-03-24T10:18:50.80 0.6 undecidable manual S 288 33.0447 104 -0.03 50
IV.RM33.EHZ. 2023-03-24T10:18:50.96 0.3 undecidable manual P 120 67.8765 50 -0.26 67
IV.MURB.HNE. 2023-03-24T10:18:48.51 0.3 undecidable manual P 3 49.2174 50 0.16 71
IV.NRCA.HHZ. 2023-03-24T10:18:48.24 0.3 undecidable manual P 88 50.2164 50 -0.26 69
IV.LNSS.HHZ. 2023-03-24T10:18:48.33 0.1 undecidable manual P 118 50.3163 50 -0.19 94
IV.ASSB.HHZ. 2023-03-24T10:18:48.90 0.3 undecidable manual S 28 27.9498 107 -0.25 72
IV.FDMO.HHZ. 2023-03-24T10:18:48.89 0.3 undecidable manual P 63 53.6019 50 -0.13 71
IV.SACS.HHZ. 2023-03-24T10:18:48.04 0.3 undecidable manual P 274 47.9187 50 -0.12 72
IV.CESX.HHZ. 2023-03-24T10:18:48.00 0.6 undecidable manual S 163 24.4533 109 0 51
IV.ATCC.EHE. 2023-03-24T10:18:47.12 0.3 undecidable manual P 16 42.1245 50 -0.14 72
IT.FOPC.HGZ. 2023-03-24T10:18:47.95 0.6 undecidable manual S 45 23.5542 110 0.25 49
IV.CESI.HHZ. 2023-03-24T10:18:46.61 0.1 undecidable manual P 58 38.9277 50 -0.16 96
IV.ARRO.EHZ. 2023-03-24T10:18:46.22 0.3 undecidable manual P 141 34.4433 50 0.14 73
IV.GAVE.EHE. 2023-03-24T10:18:45.99 0.3 undecidable manual P 113 35.2425 50 -0.21 72
IV.MGAB.HHZ. 2023-03-24T10:18:45.66 0.3 undecidable manual P 288 33.0447 104 -0.18 73
IV.ASSB.HHZ. 2023-03-24T10:18:44.77 0.1 undecidable manual P 28 27.9498 107 -0.09 100
IT.FOPC.HGZ. 2023-03-24T10:18:44.13 0.3 undecidable manual P 45 23.5542 110 0.1 75
IV.CESX.HHZ. 2023-03-24T10:18:44.19 0.3 undecidable manual P 163 24.4533 109 -0.01 76
IT.GNU.HGZ. 2023-03-24T10:18:42.50 0.3 undecidable manual S 106 6.0939 144 -0.12 77
IV.MOMA.HNZ. 2023-03-24T10:18:42.50 0.3 undecidable manual S 106 6.0939 144 -0.12 77
IV.MOMA.HNZ. 2023-03-24T10:18:41.36 0.1 undecidable manual P 106 6.0939 144 0.26 100
IT.GNU.HGZ. 2023-03-24T10:18:41.35 0.1 undecidable manual P 106 6.0939 144 0.26 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:2.6 0.007995 1.68 AML other m 2023-03-24T10:18:42.91
IV.MOMA.HNE. ML:2.6 0.0075 1.68 AML other m 2023-03-24T10:18:42.91
IV.MOMA.HHN. ML:1.3 0.000382 0.84 AML other m 2023-03-24T10:18:42.57
IV.MOMA.HNN. ML:2.4 0.00466 0.84 AML other m 2023-03-24T10:18:42.57
IV.CESX.HHN. ML:1.6 0.0002575 1.74 AML other m 2023-03-24T10:18:49.99
IV.ASSB.HHE. ML:1.7 0.00027649999999999994 1.4 AML other m 2023-03-24T10:18:49.22
IV.ASSB.HHN. ML:1.8 0.000333 0.28 AML other m 2023-03-24T10:18:49.29
IV.CESX.HHE. ML:1.6 0.00022250000000000001 0.28 AML other m 2023-03-24T10:18:51.56
IV.MGAB.HHE. ML:1.8 0.000296 1.56 AML other m 2023-03-24T10:18:51.99
IV.MGAB.HHN. ML:2.0 0.00045400000000000003 0.26 AML other m 2023-03-24T10:18:52.76
IV.CESI.HHE. ML:1.5 0.0001175 0.3 AML other m 2023-03-24T10:18:53.34
IV.CESI.HHN. ML:1.6 0.000144 1.72 AML other m 2023-03-24T10:18:53.03
IV.ATCC.EHE. ML:1.7 0.000179 1.1 AML other m 2023-03-24T10:18:55.93
IV.ATCC.EHN. ML:1.6 0.00013700000000000002 0.42 AML other m 2023-03-24T10:18:56.05
IV.LNSS.HHE. ML:2.0 0.0002935 1.02 AML other m 2023-03-24T10:18:56.23
IV.LNSS.HHN. ML:2.0 0.0002295 0.98 AML other m 2023-03-24T10:18:56.83
IV.SACS.HHE. ML:1.6 0.00009779999999999999 1.82 AML other m 2023-03-24T10:18:56.99
IV.SACS.HHN. ML:1.4 0.0000745 0.58 AML other m 2023-03-24T10:18:57.65
IV.NRCA.HHN. ML:1.8 0.000177 0.12 AML other m 2023-03-24T10:18:58.00
IV.NRCA.HHE. ML:1.8 0.00017199999999999998 0.14 AML other m 2023-03-24T10:18:58.84
IV.FDMO.HHE. ML:1.4 0.00005725 1.24 AML other m 2023-03-24T10:18:59.65
IV.ATMI.HHE. ML:2.0 0.000216 0.24 AML other m 2023-03-24T10:19:02.25
IV.RM33.EHN. ML:1.7 0.0000786 1.12 AML other m 2023-03-24T10:19:02.16
IV.FDMO.HHN. ML:1.4 0.000054399999999999994 0.96 AML other m 2023-03-24T10:19:03.02
IV.SMA1.EHN. ML:2.0 0.0001445 0.86 AML other m 2023-03-24T10:19:03.48
IV.ATMI.HHN. ML:2.0 0.00021 0.48 AML other m 2023-03-24T10:19:03.30
IV.RM33.EHE. ML:1.7 0.00008415 0.3 AML other m 2023-03-24T10:19:03.49
IV.SMA1.EHE. ML:2.1 0.000195 0.32 AML other m 2023-03-24T10:19:03.55
IV.CAFI.HHN. ML:1.3 0.0000281 1.54 AML other m 2023-03-24T10:19:04.16
IV.CAFI.HHE. ML:1.3 0.000031450000000000006 0.56 AML other m 2023-03-24T10:19:06.74
IV.TERO.HHE. ML:1.4 0.000023449999999999997 0.26 AML other m 2023-03-24T10:19:09.68
IV.TERO.HHN. ML:1.4 0.00003125 0.36 AML other m 2023-03-24T10:19:10.94
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