Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 31-05-2020 and time 02:11:17 (UTC) in region 2 km SE Foligno (PG)

A magnitude ML 0.8 earthquake occured in region: 2 km SE Foligno (PG), on

  • 31-05-2020 02:11:17 (UTC)
  • 31-05-2020 04:11:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9420, 12.7190 at 15 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 2 57155 57155
Spello PG 7 8645 65800
Montefalco PG 8 5679 71479
Trevi PG 8 8469 79948
Bevagna PG 9 5081 85029
Cannara PG 13 4305 89334
Valtopina PG 13 1398 90732
Castel Ritaldi PG 14 3278 94010
Gualdo Cattaneo PG 14 6155 100165
Campello sul Clitunno PG 14 2442 102607
Giano dell'Umbria PG 17 3846 106453
Assisi PG 17 28299 134752
Sellano PG 18 1079 135831
Bastia Umbra PG 20 21874 157705
Nocera Umbra PG 20 5839 163544

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km SE of Foligno (57155 inhabitants)
33 Km SE of Perugia (166134 inhabitants)
43 Km N of Terni (111501 inhabitants)
77 Km NE of Viterbo (67173 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
86 Km W of Teramo (54892 inhabitants)
89 Km SE of Arezzo (99543 inhabitants)
99 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 2020-05-31
02:11:17		 42.9422 12.719 15 2020-05-31
02:18:02		 Sala Sismica INGV-Roma 79738681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-31 02:11:17 ± 0.15
Latitude 42.9422 ± 0.0054
Longitude 12.7190 ± 0.0123
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79738681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 969
Semi-minor axis of confidence ellipse (meter) 174
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 103
Circular confidence region, given by single value of horizontal uncertainty (meter) 970.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36423
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 79738681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-31 02:18:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARRO.EHZ. 2020-05-31T02:11:31.29 0.3 undecidable manual S 175 40.4262 98 0.03 72
IV.CESX.HHZ. 2020-05-31T02:11:30.95 0.3 undecidable manual S 196 38.5281 99 0.19 69
IV.ATCC.EHZ. 2020-05-31T02:11:28.26 0.3 undecidable manual S 347 27.6501 105 0.34 69
IV.MML1.HNZ. 2020-05-31T02:11:27.90 0.3 undecidable manual S 47 27.9498 104 -0.09 72
IV.ARRO.EHZ. 2020-05-31T02:11:26.31 0.3 undecidable manual P 175 40.4262 98 0.68 60
IV.MTCL.HGZ. 2020-05-31T02:11:26.71 3.0 undecidable manual S 0
IV.MOMA.HHZ. 2020-05-31T02:11:25.81 0.3 undecidable manual S 218 19.5693 115 -0.06 75
IV.CESI.HHZ. 2020-05-31T02:11:25.29 0.3 undecidable manual S 65 16.5723 120 0.12 74
IV.MTCL.HGZ. 2020-05-31T02:11:25.95 3.0 undecidable manual P 0
IV.NRCA.HHZ. 2020-05-31T02:11:24.36 3.0 positive manual P -0.05 0
IV.CESX.HHZ. 2020-05-31T02:11:24.92 0.3 undecidable manual P 196 38.5281 99 -0.42 66
IV.ASSB.HHZ. 2020-05-31T02:11:24.16 0.3 undecidable manual S 336 12.1767 132 -0.05 75
IV.MML1.HNZ. 2020-05-31T02:11:23.50 0.3 undecidable manual P 47 27.9498 104 -0.24 70
IV.ATCC.EHZ. 2020-05-31T02:11:23.75 0.3 undecidable manual P 347 27.6501 105 0.05 73
IV.CESI.HHZ. 2020-05-31T02:11:22.03 0.1 undecidable manual P 65 16.5723 120 -0.08 98
IV.MOMA.HHZ. 2020-05-31T02:11:22.28 0.1 undecidable manual P 218 19.5693 115 -0.23 96
IV.ASSB.HHZ. 2020-05-31T02:11:21.50 0.1 undecidable manual P 336 12.1767 132 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:0.9 0.00007605 0.18 AML other m 2020-05-31T02:11:24.36
IV.ASSB.HHN. ML:1.1 0.00010375 0.16 AML other m 2020-05-31T02:11:24.38
IV.MOMA.HHN. ML:0.7 0.0000344 0.66 AML other m 2020-05-31T02:11:26.53
IV.MOMA.HHE. ML:0.8 0.0000376 1.2 AML other m 2020-05-31T02:11:26.82
IV.ATCC.EHN. ML:0.8 0.000027700000000000002 0.64 AML other m 2020-05-31T02:11:28.85
IV.ATCC.EHE. ML:0.9 0.000033100000000000005 0.34 AML other m 2020-05-31T02:11:29.47
IV.NRCA.HHN. ML:0.6 0.000016400000000000002 0.1 AML other m 2020-05-31T02:11:30.46
IV.NRCA.HHE. ML:0.8 0.000026700000000000002 0.9 AML other m 2020-05-31T02:11:30.98
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