Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-04-2022 and time 22:59:44 (UTC) in region 3 km N Spoleto (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km N Spoleto (PG), on

  • 04-04-2022 22:59:44 (UTC)
  • 05-04-2022 00:59:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7620, 12.7460 at 10 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
Spoleto PG 3 38218 38218
Campello sul Clitunno PG 7 2442 40660
Sant'Anatolia di Narco PG 8 564 41224
Scheggino PG 9 461 41685
Castel Ritaldi PG 9 3278 44963
Vallo di Nera PG 10 364 45327
Trevi PG 13 8469 53796
Cerreto di Spoleto PG 15 1075 54871
Giano dell'Umbria PG 16 3846 58717
Ferentillo TR 16 1913 60630
Poggiodomo PG 16 117 60747
Montefalco PG 17 5679 66426
Acquasparta TR 18 4778 71204
Massa Martana PG 18 3770 74974
Montefranco TR 18 1276 76250
Arrone TR 20 2763 79013

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km S of Foligno (57155 inhabitants)
24 Km NE of Terni (111501 inhabitants)
48 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
79 Km W of Teramo (54892 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
89 Km N of Tivoli (56533 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 1.0 2022-04-04
22:59:44		 42.7617 12.7458 10 2022-04-04
23:05:14		 Sala Sismica INGV-Roma 102787581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-04-04 22:59:44 ± 0.04
Latitude 42.7617 ± 0.0036
Longitude 12.7458 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 102787581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 461
Semi-minor axis of confidence ellipse (meter) 259
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47124
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 102787581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-04-04 23:05:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHZ. 2022-04-04T23:00:01.47 1.0 undecidable manual S 107 50.2164 50 0.55 21
IV.CSP1.EHZ. 2022-04-04T23:00:01.74 0.6 undecidable manual S 45 52.3032 50 0.27 45
IV.RM33.EHZ. 2022-04-04T23:00:00.64 0.6 undecidable manual S 126 47.4192 50 0.47 44
IV.MML1.EHZ. 2022-04-04T22:59:59.16 0.3 undecidable manual S 25 43.1235 50 0.12 71
IV.MC2.EHZ. 2022-04-04T22:59:58.38 0.6 undecidable manual S 65 39.7269 50 0.27 46
IV.FDMO.HHZ. 2022-04-04T22:59:58.26 0.6 undecidable manual S 42 41.2254 50 -0.26 46
IV.MGAB.HHZ. 2022-04-04T22:59:55.34 3.0 negative manual P 0.18 0
IV.LNSS.HHZ. 2022-04-04T22:59:55.23 0.6 undecidable manual S 126 29.748 50 -0.24 47
IV.CESI.HHZ. 2022-04-04T22:59:55.32 0.6 undecidable manual S 25 29.9478 50 -0.18 48
IV.NRCA.HHZ. 2022-04-04T22:59:55.58 0.6 undecidable manual S 75 31.0467 50 -0.22 47
IV.ASSB.HHZ. 2022-04-04T22:59:55.94 0.6 undecidable manual S 347 31.9458 50 -0.11 48
IV.SMA1.EHZ. 2022-04-04T22:59:54.20 0.6 negative manual P 107 50.2164 50 0.08 47
IV.CSP1.EHZ. 2022-04-04T22:59:54.50 1.0 positive manual P 45 52.3032 50 0.05 24
IV.MML1.EHZ. 2022-04-04T22:59:53.42 1.0 negative manual P 25 43.1235 50 0.38 22
IV.RM33.EHZ. 2022-04-04T22:59:53.51 0.6 negative manual P 126 47.4192 50 -0.19 46
IV.ARRO.EHZ. 2022-04-04T22:59:52.40 1.0 undecidable manual S 175 20.2686 117 -0.33 24
IV.MC2.EHZ. 2022-04-04T22:59:52.51 1.0 undecidable manual P 65 39.7269 50 0 24
IV.FDMO.HHZ. 2022-04-04T22:59:52.71 1.0 undecidable manual P 42 41.2254 50 -0.03 24
IV.CESX.HHZ. 2022-04-04T22:59:52.89 0.6 undecidable manual S 217 21.3675 115 -0.17 49
IV.ASSB.HHZ. 2022-04-04T22:59:51.31 0.3 negative manual P 347 31.9458 50 0 74
IT.GNU.HGZ. 2022-04-04T22:59:51.00 0.6 undecidable manual S 288 15.0738 124 -0.15 50
IV.MOMA.HHZ. 2022-04-04T22:59:51.18 0.6 undecidable manual S 288 15.0738 124 0.03 51
IV.NRCA.HHZ. 2022-04-04T22:59:50.99 0.1 negative manual P 75 31.0467 50 -0.18 96
IV.GAVE.EHZ. 2022-04-04T22:59:50.81 0.6 undecidable manual S 122 14.3745 125 -0.13 50
IV.LNSS.HHZ. 2022-04-04T22:59:50.78 0.1 negative manual P 126 29.748 50 -0.2 96
IV.CESI.HHZ. 2022-04-04T22:59:50.94 0.3 undecidable manual P 25 29.9478 50 -0.06 74
IV.CESX.HHZ. 2022-04-04T22:59:49.74 1.0 undecidable manual P 217 21.3675 115 0.15 24
IV.ARRO.EHZ. 2022-04-04T22:59:49.64 0.1 undecidable manual P 175 20.2686 117 0.24 96
IV.MOMA.HHZ. 2022-04-04T22:59:48.59 0.1 negative manual P 288 15.0738 124 0.1 100
IT.GNU.HGZ. 2022-04-04T22:59:48.55 0.3 undecidable manual P 288 15.0738 124 0.06 76
IV.GAVE.EHZ. 2022-04-04T22:59:48.39 0.6 negative manual P 122 14.3745 125 0.02 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHN. ML:1.1 0.0001248 0.3 AML other m 2022-04-04T22:59:51.53
IV.GAVE.EHN. ML:1.3 0.000215 0.38 AML other m 2022-04-04T22:59:51.64
IV.MOMA.HHE. ML:1.3 0.00017749999999999998 0.16 AML other m 2022-04-04T22:59:51.74
IV.GAVE.EHE. ML:1.3 0.00021 0.72 AML other m 2022-04-04T22:59:51.84
IV.CESX.HHE. ML:0.7 0.00003455 1.12 AML other m 2022-04-04T22:59:53.94
IV.CESX.HHN. ML:0.8 0.00004405 1.06 AML other m 2022-04-04T22:59:53.04
IV.CESI.HHN. ML:1.1 0.000054850000000000005 0.24 AML other m 2022-04-04T22:59:55.75
IV.CESI.HHE. ML:0.8 0.0000323 0.48 AML other m 2022-04-04T22:59:55.64
IV.NRCA.HHN. ML:1.3 0.00008740000000000001 0.14 AML other m 2022-04-04T22:59:55.91
IV.LNSS.HHE. ML:1.0 0.00005645 0.12 AML other m 2022-04-04T22:59:56.08
IV.NRCA.HHE. ML:1.1 0.0000621 0.14 AML other m 2022-04-04T22:59:56.19
IV.LNSS.HHN. ML:1.1 0.00005995 0.1 AML other m 2022-04-04T22:59:56.30
IV.ASSB.HHN. ML:1.0 0.000050950000000000005 0.42 AML other m 2022-04-04T22:59:56.64
IV.ASSB.HHE. ML:1.0 0.00004865 0.84 AML other m 2022-04-04T22:59:57.42
IV.FDMO.HHE. ML:0.8 0.00002225 1.22 AML other m 2022-04-04T22:59:58.37
IV.FDMO.HHN. ML:0.7 0.000016300000000000003 1.12 AML other m 2022-04-04T22:59:59.78
IV.SMA1.EHN. ML:0.9 0.0000212 0.3 AML other m 2022-04-04T23:00:02.88
IV.SMA1.EHE. ML:1.1 0.00003395 0.26 AML other m 2022-04-04T23:00:02.96
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