Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 16-04-2021 and time 21:17:54 (Italy) in region 9 km E Foligno (PG)

A magnitude ML 0.6 earthquake occured in region: 9 km E Foligno (PG), on

  • 16-04-2021 19:17:54 (UTC)
  • 16-04-2021 21:17:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9780, 12.8080 at 12 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
Foligno PG 9 57155 57155
Valtopina PG 10 1398 58553
Spello PG 11 8645 67198
Trevi PG 12 8469 75667
Sellano PG 14 1079 76746
Nocera Umbra PG 15 5839 82585
Montefalco PG 16 5679 88264
Serravalle di Chienti MC 16 1070 89334
Monte Cavallo MC 16 145 89479
Bevagna PG 17 5081 94560
Campello sul Clitunno PG 18 2442 97002
Cannara PG 18 4305 101307
Assisi PG 19 28299 129606
Cerreto di Spoleto PG 20 1075 130681

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of Foligno (57155 inhabitants)
37 Km E of Perugia (166134 inhabitants)
48 Km N of Terni (111501 inhabitants)
81 Km W of Teramo (54892 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
85 Km NW of L'Aquila (69753 inhabitants)
92 Km SW of Ancona (100861 inhabitants)
93 Km SE of Arezzo (99543 inhabitants)
98 Km S of Fano (60888 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 2021-04-16
19:17:54		 42.9782 12.8083 12 2021-04-16
19:25:14		 Sala Sismica INGV-Roma 89154571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-16 19:17:54 ± 0.06
Latitude 42.9782 ± 0.0027
Longitude 12.8083 ± 0.0025
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89154571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 299
Semi-minor axis of confidence ellipse (meter) 60
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 163
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31117
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:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 89154571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-16 19:25:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-04-16T19:18:06.67 0.3 undecidable manual S 68 34.5432 92 0.1 72
IV.NRCA.HHZ. 2021-04-16T19:18:05.42 0.6 undecidable manual S 123 29.5482 92 0.17 48
IV.MOMA.HHZ. 2021-04-16T19:18:04.68 0.3 undecidable manual S 225 27.3504 92 0.03 74
IV.ATCC.EHZ. 2021-04-16T19:18:04.61 3.0 undecidable manual S 0
IV.FDMO.HHZ. 2021-04-16T19:18:03.40 0.3 undecidable manual S 74 23.5542 93 -0.24 72
IV.MML1.EHN. 2021-04-16T19:18:02.73 0.1 undecidable manual S 41 20.0688 95 0.03 100
IV.CSP1.EHZ. 2021-04-16T19:18:01.71 0.6 negative manual P 68 34.5432 92 0.08 48
IV.ASSB.HHZ. 2021-04-16T19:18:01.09 0.6 undecidable manual S 301 14.0748 106 -0.04 50
IV.MOMA.HHZ. 2021-04-16T19:18:00.53 0.6 undecidable manual P 225 27.3504 92 0 50
IV.NRCA.HHZ. 2021-04-16T19:18:00.78 0.1 negative manual P 123 29.5482 92 -0.09 97
IV.FDMO.HHZ. 2021-04-16T19:17:59.96 1.0 negative manual P 74 23.5542 93 0.02 25
IV.MML1.EHN. 2021-04-16T19:17:59.31 0.1 undecidable manual P 41 20.0688 95 -0.09 100
IV.CESI.HHZ. 2021-04-16T19:17:59.84 0.3 undecidable manual S 69 8.3805 132 0.04 77
IV.ASSB.HHZ. 2021-04-16T19:17:58.48 0.6 undecidable manual P 301 14.0748 106 -0.02 51
IV.CESI.HHZ. 2021-04-16T19:17:58.01 1.0 undecidable manual P 69 8.3805 132 0.28 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:0.4 0.0000296 0.5 AML other m 2021-04-16T19:18:00.06
IV.CESI.HHE. ML:0.4 0.000032800000000000004 0.08 AML other m 2021-04-16T19:18:00.49
IV.ASSB.HHN. ML:0.6 0.00003665 0.16 AML other m 2021-04-16T19:18:01.41
IV.ASSB.HHE. ML:0.5 0.000028749999999999997 0.18 AML other m 2021-04-16T19:18:02.21
IV.NRCA.HHN. ML:0.8 0.000032500000000000004 0.1 AML other m 2021-04-16T19:18:05.57
IV.NRCA.HHE. ML:0.8 0.00003185 0.74 AML other m 2021-04-16T19:18:05.60
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