Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 01-04-2021 and time 01:46:29 (Italy) in region 10 km SE Valtopina (PG)

A magnitude ML 0.6 earthquake occured in region: 10 km SE Valtopina (PG), on

  • 31-03-2021 23:46:29 (UTC)
  • 01-04-2021 01:46:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0100, 12.8550 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
Valtopina PG 10 1398 1398
Serravalle di Chienti MC 11 1070 2468
Monte Cavallo MC 12 145 2613
Nocera Umbra PG 12 5839 8452
Foligno PG 14 57155 65607
Sellano PG 15 1079 66686
Spello PG 15 8645 75331
Pieve Torina MC 16 1458 76789
Sefro MC 17 422 77211
Trevi PG 17 8469 85680
Muccia MC 17 915 86595
Fiordimonte MC 19 202 86797
Pievebovigliana MC 20 866 87663

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Foligno (57155 inhabitants)
39 Km E of Perugia (166134 inhabitants)
53 Km NE of Terni (111501 inhabitants)
80 Km W of Teramo (54892 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
94 Km S of Fano (60888 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
100 Km S of Pesaro (94582 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 0.6 2021-03-31
23:46:29		 43.0102 12.8552 10 2021-03-31
23:54:02		 Sala Sismica INGV-Roma 88656201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-31 23:46:29 ± 0.06
Latitude 43.0102 ± 0.0054
Longitude 12.8552 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88656201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 556
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 4
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.03687
Epicentral distance of station farthest from the epicenter (degree) 0.29318
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 88656201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-31 23:54:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HNZ. 2021-03-31T23:46:41.98 0.6 undecidable manual S 225 32.5452 50 0.62 42
IV.CSP1.EHZ. 2021-03-31T23:46:40.93 0.6 undecidable manual S 72 29.748 50 0.32 46
IV.NRCA.HHZ. 2021-03-31T23:46:39.87 0.6 undecidable manual S 133 28.749 50 -0.47 44
IV.ATCC.EHZ. 2021-03-31T23:46:39.41 0.6 undecidable manual S 318 26.0517 110 -0.08 49
IV.FDMO.HHZ. 2021-03-31T23:46:37.30 0.6 undecidable manual S 81 19.0698 116 0.06 49
IV.MOMA.HNZ. 2021-03-31T23:46:36.39 0.1 undecidable manual P 225 32.5452 50 -0.1 96
IV.ASSB.HHZ. 2021-03-31T23:46:36.26 0.6 undecidable manual S 283 16.3725 120 -0.14 49
IV.MML1.HNE. 2021-03-31T23:46:35.87 0.6 undecidable manual S 39 14.874 123 -0.1 49
IV.ATCC.EHZ. 2021-03-31T23:46:35.38 1.0 undecidable manual P 318 26.0517 110 -0.03 25
IV.NRCA.HHZ. 2021-03-31T23:46:35.75 0.1 undecidable manual P 133 28.749 50 -0.16 95
IT.MTCL.HGZ. 2021-03-31T23:46:35.24 0.6 undecidable manual S 99 11.877 129 0.13 49
IV.CSP1.EHZ. 2021-03-31T23:46:35.95 0.6 positive manual P 72 29.748 50 -0.11 48
IV.CESI.HHZ. 2021-03-31T23:46:33.28 0.6 undecidable manual S 98 4.0959 157 -0.15 50
IV.MML1.HNE. 2021-03-31T23:46:33.44 0.1 undecidable manual P 39 14.874 123 0.05 99
IV.ASSB.HHZ. 2021-03-31T23:46:33.62 0.1 positive manual P 283 16.3725 120 -0.02 100
IV.FDMO.HHZ. 2021-03-31T23:46:33.84 1.0 undecidable manual P 81 19.0698 116 -0.27 24
IT.MTCL.HGZ. 2021-03-31T23:46:33.06 0.1 undecidable manual P 99 11.877 129 0.17 98
IV.CESI.HHZ. 2021-03-31T23:46:32.09 0.6 undecidable manual P 98 4.0959 157 0.18 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.6 0.0000824 0.06 AML other m 2021-03-31T23:46:33.71
IV.CESI.HHN. ML:0.6 0.00006495 0.4 AML other m 2021-03-31T23:46:33.86
IV.ASSB.HHE. ML:0.6 0.00003895 0.2 AML other m 2021-03-31T23:46:36.35
IV.ASSB.HHN. ML:0.7 0.000042999999999999995 0.84 AML other m 2021-03-31T23:46:37.46
IV.FDMO.HHN. ML:0.4 0.0000223 0.22 AML other m 2021-03-31T23:46:37.44
IV.FDMO.HHE. ML:0.4 0.00002065 1.16 AML other m 2021-03-31T23:46:38.72
IV.NRCA.HHN. ML:0.8 0.0000291 0.1 AML other m 2021-03-31T23:46:40.31
IV.NRCA.HHE. ML:0.7 0.00002565 0.18 AML other m 2021-03-31T23:46:44.12
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