Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 07-08-2022 and time 21:45:37 (UTC) in region 4 km SW Massa Martana (PG)

A magnitude ML 1.3 earthquake occured in region: 4 km SW Massa Martana (PG), on

  • 07-08-2022 21:45:37 (UTC)
  • 07-08-2022 23:45:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7410, 12.5050 at 9 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 4 3770 3770
Acquasparta TR 7 4778 8548
Todi PG 9 16851 25399
Montecastrilli TR 10 5022 30421
Avigliano Umbro TR 11 2558 32979
Giano dell'Umbria PG 12 3846 36825
San Gemini TR 15 5018 41843
Castel Ritaldi PG 17 3278 45121
Monte Castello di Vibio PG 17 1567 46688
Fratta Todina PG 17 1839 48527
Collazzone PG 18 3473 52000
Spoleto PG 19 38218 90218
Gualdo Cattaneo PG 19 6155 96373
Montecchio TR 20 1676 98049

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of Terni (111501 inhabitants)
29 Km SW of Foligno (57155 inhabitants)
42 Km S of Perugia (166134 inhabitants)
49 Km NE of Viterbo (67173 inhabitants)
84 Km N of Guidonia Montecelio (88673 inhabitants)
85 Km NW of L'Aquila (69753 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
93 Km NE of Civitavecchia (52991 inhabitants)
94 Km N of Roma (2864731 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
99 Km W of Teramo (54892 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 1.3 2022-08-07
21:45:37		 42.7407 12.5052 9 2022-08-07
21:52:37		 Sala Sismica INGV-Roma 108255471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-08-07 21:45:37 ± 0.07
Latitude 42.7407 ± 0.0036
Longitude 12.5052 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 108255471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 452
Semi-minor axis of confidence ellipse (meter) 388
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 215
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 23
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) 0.65291
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 108255471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-08-07 21:52:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2022-08-07T21:45:58.96 1.0 undecidable manual S 55 68.8755 50 0.18 22
IV.RM33.EHZ. 2022-08-07T21:45:57.41 0.6 undecidable manual S 114 63.3921 50 0.11 45
IV.MC2.EHZ. 2022-08-07T21:45:57.07 1.0 undecidable manual S 71 58.7967 50 0.99 17
IV.MML1.EHZ. 2022-08-07T21:45:55.91 0.6 undecidable manual S 42 56.0994 50 0.54 42
IV.NRCA.HHZ. 2022-08-07T21:45:53.80 0.6 undecidable manual S 78 50.616 50 -0.11 46
IV.CESI.HHZ. 2022-08-07T21:45:51.86 0.6 undecidable manual S 48 43.7229 50 -0.21 46
IV.MGAB.HNE. 2022-08-07T21:45:50.54 0.3 undecidable manual S 301 37.2294 50 0.21 70
IV.FIAM.HHZ. 2022-08-07T21:45:50.19 1.0 undecidable manual P 136 72.4719 50 -0.12 22
IV.CSP1.EHZ. 2022-08-07T21:45:49.71 0.1 undecidable manual P 55 68.8755 50 -0.04 91
IV.ASSB.HHZ. 2022-08-07T21:45:49.55 0.6 undecidable manual S 20 35.742 50 -0.38 45
IV.RM33.EHZ. 2022-08-07T21:45:48.60 1.0 negative manual P 114 63.3921 50 -0.29 22
IV.MC2.EHZ. 2022-08-07T21:45:48.29 1.0 positive manual P 71 58.7967 50 0.1 23
IV.MURB.HHZ. 2022-08-07T21:45:48.47 3.0 positive manual P 0.06 0
IV.MML1.EHZ. 2022-08-07T21:45:47.87 0.3 undecidable manual P 42 56.0994 50 0.09 69
IV.SACS.HHZ. 2022-08-07T21:45:47.54 3.0 undecidable manual P 0.03 0
IV.NRCA.HHZ. 2022-08-07T21:45:46.71 0.3 positive manual P 78 50.616 50 -0.23 68
IV.CESI.HHZ. 2022-08-07T21:45:45.70 1.0 undecidable manual P 48 43.7229 50 -0.17 23
IV.ASSB.HHZ. 2022-08-07T21:45:44.52 0.3 positive manual P 20 35.742 50 -0.12 71
IV.MGAB.HNE. 2022-08-07T21:45:44.76 0.1 undecidable manual P 301 37.2294 50 -0.11 95
IV.ARRO.EHZ. 2022-08-07T21:45:43.17 1.0 undecidable manual P 130 27.75 107 -0.08 24
IV.CESX.HHZ. 2022-08-07T21:45:43.74 0.6 undecidable manual S 156 16.0728 118 -0.03 50
IV.CESX.HHZ. 2022-08-07T21:45:41.21 0.6 positive manual P 156 16.0728 118 0.13 49
IV.MOMA.HHZ. 2022-08-07T21:45:41.55 0.6 undecidable manual S 37 8.7801 135 -0.17 49
IT.GNU.HGN. 2022-08-07T21:45:40.01 0.1 undecidable manual P 37 8.7801 135 0.11 100
IV.MOMA.HHZ. 2022-08-07T21:45:39.99 0.1 negative manual P 37 8.7801 135 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:1.7 0.000744 1.34 AML other m 2022-08-07T21:45:42.90
IV.MOMA.HNE. ML:1.6 0.000661 1.34 AML other m 2022-08-07T21:45:42.23
IV.MOMA.HNN. ML:1.5 0.0004805 0.48 AML other m 2022-08-07T21:45:42.26
IV.MOMA.HHN. ML:1.5 0.0005335000000000001 0.12 AML other m 2022-08-07T21:45:42.44
IV.CESX.HHE. ML:1.2 0.000161 1.38 AML other m 2022-08-07T21:45:45.85
IV.CESX.HHN. ML:1.2 0.00016249999999999997 1.4 AML other m 2022-08-07T21:45:45.97
IV.ARRO.EHE. ML:1.1 0.00006584999999999999 0.14 AML other m 2022-08-07T21:45:48.88
IV.ASSB.HHE. ML:1.1 0.000051000000000000006 1.6 AML other m 2022-08-07T21:45:50.83
IV.ARRO.EHN. ML:1.1 0.00007005 1.04 AML other m 2022-08-07T21:45:50.91
IV.RM33.EHN. ML:1.1 0.0000266 0.52 AML other m 2022-08-07T21:45:50.64
IV.ASSB.HHN. ML:1.0 0.0000392 0.64 AML other m 2022-08-07T21:45:51.09
IV.CESI.HHE. ML:0.8 0.000020850000000000002 0.34 AML other m 2022-08-07T21:45:52.24
IV.CESI.HHN. ML:1.2 0.0000499 1.1 AML other m 2022-08-07T21:45:52.05
IV.NRCA.HHE. ML:1.4 0.00006685000000000001 0.62 AML other m 2022-08-07T21:45:55.59
IV.NRCA.HHN. ML:1.3 0.000050799999999999995 0.14 AML other m 2022-08-07T21:45:55.63
IV.SACS.HHN. ML:1.0 0.00002555 0.44 AML other m 2022-08-07T21:45:56.18
IV.SACS.HHE. ML:0.9 0.0000187 0.5 AML other m 2022-08-07T21:45:56.65
IV.MC2.EHN. ML:1.5 0.00006500000000000001 0.24 AML other m 2022-08-07T21:45:58.10
IV.RM33.EHE. ML:1.3 0.0000351 0.96 AML other m 2022-08-07T21:45:58.67
IV.MURB.HHE. ML:1.4 0.0000599 0.6 AML other m 2022-08-07T21:45:59.43
IV.MURB.HHN. ML:1.6 0.00008790000000000001 0.32 AML other m 2022-08-07T21:45:59.98
IV.MC2.EHE. ML:1.4 0.000054999999999999995 0.84 AML other m 2022-08-07T21:46:00.23
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