Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 20-02-2023 and time 02:29:15 (Italy) in region 3 km NW Sellano (PG)

A magnitude ML 0.8 earthquake occured in region: 3 km NW Sellano (PG), on

  • 20-02-2023 01:29:15 (UTC)
  • 20-02-2023 02:29:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9120, 12.9130 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 10 1075 2154
Preci PG 11 724 2878
Monte Cavallo MC 12 145 3023
Trevi PG 14 8469 11492
Visso MC 15 1107 12599
Campello sul Clitunno PG 15 2442 15041
Vallo di Nera PG 16 364 15405
Foligno PG 18 57155 72560
Serravalle di Chienti MC 18 1070 73630
Pieve Torina MC 19 1458 75088
Ussita MC 19 444 75532
Castelsantangelo sul Nera MC 20 281 75813
Norcia PG 20 4957 80770

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
48 Km E of Perugia (166134 inhabitants)
71 Km W of Teramo (54892 inhabitants)
74 Km NW of L'Aquila (69753 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
93 Km SW of Ancona (100861 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 0.8 2023-02-20
01:29:15		 42.9123 12.9128 11 2023-02-20
01:35:37		 Sala Sismica INGV-Roma 114608871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-20 01:29:15 ± 0.07
Latitude 42.9123 ± 0.0027
Longitude 12.9128 ± 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 114608871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 497
Semi-minor axis of confidence ellipse (meter) 286
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 73
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
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) 0.43887
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 114608871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-20 01:35:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2023-02-20T01:29:31.86 3.0 undecidable manual P 0
IV.GAVE.EHZ. 2023-02-20T01:29:24.64 0.3 undecidable manual S 184 24.4533 50 -0.15 73
IV.MML1.EHZ. 2023-02-20T01:29:24.24 0.1 undecidable manual S 12 22.8549 50 -0.11 96
IV.MC2.EHZ. 2023-02-20T01:29:24.65 0.3 undecidable manual S 90 22.4553 50 0.4 71
IV.EL6.EHZ. 2023-02-20T01:29:24.67 0.3 undecidable manual P 18 48.7179 50 -0.01 71
IV.FDMO.HHZ. 2023-02-20T01:29:23.20 0.1 undecidable manual S 46 19.7691 118 -0.26 93
IV.NRCA.HHZ. 2023-02-20T01:29:22.96 0.1 undecidable manual S 118 18.5703 120 -0.14 96
IV.ATCC.EHZ. 2023-02-20T01:29:22.87 0.3 undecidable manual P 324 37.4292 50 -0.08 72
IV.SNTG.HHZ. 2023-02-20T01:29:22.92 0.3 undecidable manual P 3 38.0286 50 -0.12 71
IV.MC2.EHZ. 2023-02-20T01:29:20.77 0.1 undecidable manual P 90 22.4553 50 0.14 99
IV.GAVE.EHZ. 2023-02-20T01:29:20.96 0.1 undecidable manual P 184 24.4533 50 0.01 99
IV.FDMO.HHZ. 2023-02-20T01:29:20.15 0.1 undecidable manual P 46 19.7691 118 -0.03 99
IV.CESI.HHZ. 2023-02-20T01:29:20.94 0.1 undecidable manual S 356 10.2786 136 0.14 99
IV.MML1.EHZ. 2023-02-20T01:29:20.62 0.1 undecidable manual P 12 22.8549 50 -0.07 97
IV.NRCA.HHZ. 2023-02-20T01:29:19.98 0.1 undecidable manual P 118 18.5703 120 0.01 100
IV.CESI.HHZ. 2023-02-20T01:29:18.90 0.1 undecidable manual P 356 10.2786 136 0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.9 0.00010045 0.24 AML other m 2023-02-20T01:29:21.22
IV.CESI.HHE. ML:0.7 0.000057300000000000004 0.58 AML other m 2023-02-20T01:29:21.22
IV.FDMO.HHE. ML:0.7 0.0000331 0.82 AML other m 2023-02-20T01:29:23.29
IV.FDMO.HHN. ML:0.7 0.0000327 0.52 AML other m 2023-02-20T01:29:23.28
IV.NRCA.HHN. ML:0.6 0.00003435 0.1 AML other m 2023-02-20T01:29:23.55
IV.MML1.EHN. ML:1.0 0.0000613 0.2 AML other m 2023-02-20T01:29:24.59
IV.MML1.EHE. ML:0.9 0.0000544 0.2 AML other m 2023-02-20T01:29:24.62
IV.NRCA.HHE. ML:0.6 0.0000362 1.22 AML other m 2023-02-20T01:29:24.90
IV.GAVE.EHN. ML:1.2 0.00009070000000000001 0.58 AML other m 2023-02-20T01:29:25.42
IV.GAVE.EHE. ML:1.2 0.00008675 0.16 AML other m 2023-02-20T01:29:25.19
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