Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 18-05-2022 and time 20:21:23 (Italy) in region 3 km E Castel Ritaldi (PG)

A magnitude ML 1.0 earthquake occured in region: 3 km E Castel Ritaldi (PG), on

  • 18-05-2022 18:21:23 (UTC)
  • 18-05-2022 20:21:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8130, 12.7060 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
Castel Ritaldi PG 3 3278 3278
Campello sul Clitunno PG 6 2442 5720
Trevi PG 8 8469 14189
Spoleto PG 9 38218 52407
Montefalco PG 10 5679 58086
Giano dell'Umbria PG 11 3846 61932
Vallo di Nera PG 14 364 62296
Sant'Anatolia di Narco PG 14 564 62860
Scheggino PG 15 461 63321
Massa Martana PG 15 3770 67091
Bevagna PG 16 5081 72172
Foligno PG 16 57155 129327
Gualdo Cattaneo PG 16 6155 135482
Cerreto di Spoleto PG 17 1075 136557
Acquasparta TR 19 4778 141335

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km S of Foligno (57155 inhabitants)
28 Km N of Terni (111501 inhabitants)
42 Km SE of Perugia (166134 inhabitants)
66 Km NE of Viterbo (67173 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
83 Km W of Teramo (54892 inhabitants)
90 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
99 Km SE of Arezzo (99543 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 2022-05-18
18:21:23		 42.813 12.7063 8 2022-05-18
18:45:40		 Sala Sismica INGV-Roma 104831541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-18 18:21:23 ± 0.11
Latitude 42.8130 ± 0.0054
Longitude 12.7063 ± 0.0074
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 104831541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 586
Semi-minor axis of confidence ellipse (meter) 407
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 138
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.48114
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 104831541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-18 18:45:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2022-05-18T18:21:41.21 0.6 undecidable manual S 129 53.4021 50 0.68 39
IV.FDMO.HHZ. 2022-05-18T18:21:37.08 0.3 undecidable manual S 51 39.627 50 0.23 69
IV.NRCA.HHZ. 2022-05-18T18:21:35.02 0.3 undecidable manual S 86 33.2445 103 0.09 72
IV.MURB.HHZ. 2022-05-18T18:21:34.78 3.0 positive manual P 0.2 0
IV.CESI.HHZ. 2022-05-18T18:21:33.01 0.3 undecidable manual S 37 26.6511 106 0.28 70
IV.RM33.EHZ. 2022-05-18T18:21:32.60 0.1 undecidable manual P 129 53.4021 50 -0.55 83
IV.ARRO.EHZ. 2022-05-18T18:21:32.78 0.3 undecidable manual S 169 26.3514 106 0.16 72
IV.FDMO.HHZ. 2022-05-18T18:21:31.08 0.1 undecidable manual P 51 39.627 50 0.05 95
IV.GAVE.EHZ. 2022-05-18T18:21:30.89 0.6 undecidable manual S 131 20.3685 111 0.25 47
IV.NRCA.HHZ. 2022-05-18T18:21:29.72 0.1 undecidable manual P 86 33.2445 103 -0.2 93
IV.CESI.HHZ. 2022-05-18T18:21:28.34 0.1 undecidable manual P 37 26.6511 106 -0.31 92
IV.MOMA.HHZ. 2022-05-18T18:21:28.05 0.6 undecidable manual S 265 11.1777 125 0.25 48
IV.ARRO.EHZ. 2022-05-18T18:21:28.53 0.1 undecidable manual P 169 26.3514 106 -0.06 97
IV.GAVE.EHZ. 2022-05-18T18:21:27.30 0.1 undecidable manual P 131 20.3685 111 -0.14 97
IV.MOMA.HHZ. 2022-05-18T18:21:25.86 0.1 undecidable manual P 265 11.1777 125 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HHE. ML:1.2 0.0002115 0.26 AML other m 2022-05-18T18:21:28.53
IV.MOMA.HHN. ML:1.1 0.000169 0.18 AML other m 2022-05-18T18:21:28.59
IV.GAVE.EHE. ML:1.1 0.00010339999999999999 0.42 AML other m 2022-05-18T18:21:32.60
IV.GAVE.EHN. ML:1.0 0.00008400000000000001 0.3 AML other m 2022-05-18T18:21:32.70
IV.ARRO.EHE. ML:0.7 0.0000291 1.48 AML other m 2022-05-18T18:21:34.87
IV.ARRO.EHN. ML:0.6 0.00002675 0.3 AML other m 2022-05-18T18:21:36.24
IV.NRCA.HHE. ML:1.0 0.00004185 0.14 AML other m 2022-05-18T18:21:37.28
IV.NRCA.HHN. ML:0.9 0.00003485 1.3 AML other m 2022-05-18T18:21:37.65
IV.MURB.HHN. ML:1.4 0.00006890000000000001 0.08 AML other m 2022-05-18T18:21:52.70
IV.MURB.HHE. ML:1.3 0.0000467 0.06 AML other m 2022-05-18T18:21:52.73
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