Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 21-03-2023 and time 22:44:17 (Italy) in region 3 km SE Sellano (PG)

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

  • 21-03-2023 21:44:17 (UTC)
  • 21-03-2023 22:44:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8670, 12.9480 at 11 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
Sellano PG 3 1079 1079
Cerreto di Spoleto PG 6 1075 2154
Preci PG 8 724 2878
Vallo di Nera PG 13 364 3242
Visso MC 14 1107 4349
Norcia PG 15 4957 9306
Monte Cavallo MC 15 145 9451
Campello sul Clitunno PG 15 2442 11893
Trevi PG 16 8469 20362
Castelsantangelo sul Nera MC 17 281 20643
Poggiodomo PG 17 117 20760
Sant'Anatolia di Narco PG 17 564 21324
Cascia PG 17 3217 24541
Ussita MC 18 444 24985
Scheggino PG 20 461 25446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
53 Km SE of Perugia (166134 inhabitants)
66 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
98 Km N of Guidonia Montecelio (88673 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 2023-03-21
21:44:17		 42.8673 12.9475 11 2023-03-21
22:02:52		 Sala Sismica INGV-Roma 115607131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-21 21:44:17 ± 0.09
Latitude 42.8673 ± 0.0036
Longitude 12.9475 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 115607131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 539
Semi-minor axis of confidence ellipse (meter) 418
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.12051
Epicentral distance of station farthest from the epicenter (degree) 0.29318
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 115607131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-21 22:02:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2023-03-21T21:44:28.81 0.3 undecidable manual S 40 32.5452 50 0.09 95
IV.ASSB.HHZ. 2023-03-21T21:44:28.00 0.3 undecidable manual S 310 30.4473 50 -0.18 94
IV.MMO1.EHZ. 2023-03-21T21:44:28.41 0.3 undecidable manual S 83 31.0467 50 0.08 96
IV.LNSS.HHZ. 2023-03-21T21:44:27.96 0.6 undecidable manual S 166 30.2475 50 -0.17 63
IV.MML1.HNZ. 2023-03-21T21:44:27.39 0.6 undecidable manual S 4 27.3504 50 0.04 65
7F.SIB1.EHZ. 2023-03-21T21:44:26.80 0.6 undecidable manual S 83 26.3514 50 -0.29 62
IV.FDMO.HHZ. 2023-03-21T21:44:25.68 0.3 undecidable manual S 31 21.9669 50 -0.22 95
IV.CESI.HNZ. 2023-03-21T21:44:24.04 0.6 undecidable manual S 347 15.6732 124 -0.05 66
IV.GAVE.HNZ. 2023-03-21T21:44:24.73 0.6 undecidable manual S 193 19.869 118 -0.62 57
IV.LNSS.HHZ. 2023-03-21T21:44:24.00 0.6 undecidable manual P 166 30.2475 50 0.36 60
IV.NRCA.HHZ. 2023-03-21T21:44:23.48 0.3 undecidable manual S 105 14.0748 127 -0.17 97
IT.MTCL.HGZ. 2023-03-21T21:44:23.44 0.6 undecidable manual S 17 14.6742 126 -0.37 62
IV.MMO1.EHZ. 2023-03-21T21:44:23.66 0.6 positive manual P 83 31.0467 50 -0.1 64
IV.MML1.HNZ. 2023-03-21T21:44:23.68 0.6 undecidable manual P 4 27.3504 50 0.49 59
IV.CSP1.EHZ. 2023-03-21T21:44:23.98 0.6 negative manual P 40 32.5452 50 -0.01 65
IV.FEMA.HNZ. 2023-03-21T21:44:23.28 0.6 undecidable manual S 38 13.3755 129 -0.18 64
7F.SIB1.EHZ. 2023-03-21T21:44:23.35 0.6 undecidable manual P 83 26.3514 50 0.31 61
IV.ASSB.HHZ. 2023-03-21T21:44:23.38 0.3 negative manual P 310 30.4473 50 -0.28 92
IV.GAVE.HNZ. 2023-03-21T21:44:22.80 0.6 undecidable manual P 193 19.869 118 0.76 54
IV.FDMO.HHZ. 2023-03-21T21:44:22.33 0.3 undecidable manual P 31 21.9669 50 -0.03 98
IT.MTCL.HGZ. 2023-03-21T21:44:21.98 0.6 undecidable manual P 17 14.6742 126 0.83 53
IV.NRCA.HHZ. 2023-03-21T21:44:21.06 0.3 undecidable manual P 105 14.0748 127 0.01 100
IV.CESI.HNZ. 2023-03-21T21:44:21.40 0.3 undecidable manual P 347 15.6732 124 0.09 98
IV.FEMA.HNZ. 2023-03-21T21:44:21.06 0.6 undecidable manual P 38 13.3755 129 0.12 65
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.1 0.0001175 0.1 AML other m 2023-03-21T21:44:23.60
IV.NRCA.HHE. ML:1.2 0.00017050000000000002 0.14 AML other m 2023-03-21T21:44:23.68
IV.FDMO.HHN. ML:0.8 0.0000382 0.14 AML other m 2023-03-21T21:44:25.89
IV.FDMO.HHE. ML:0.8 0.000039750000000000004 1.68 AML other m 2023-03-21T21:44:25.07
IV.NRCA.HNE. ML:1.2 0.00016284025 0.1408 AML other m 2023-03-21T21:44:23.68
IV.NRCA.HNN. ML:1.2 0.00016274482000000002 0.7936 AML other m 2023-03-21T21:44:28.20
IV.ASSB.HHE. ML:0.3 0.000012459610999999999 0.1024 AML other m 2023-03-21T21:44:29.06
IV.ASSB.HHN. ML:0.3 0.0000111558013 0.0896 AML other m 2023-03-21T21:44:28.54
IV.CSP1.EHE. ML:0.9 0.000037487505000000004 0.9216 AML other m 2023-03-21T21:44:35.97
IV.CSP1.EHN. ML:1.0 0.000039491379 0.3456 AML other m 2023-03-21T21:44:29.40
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