Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 20-06-2021 and time 22:16:31 (Italy) in region 3 km E Giano dell'Umbria (PG)

A magnitude ML 0.8 earthquake occured in region: 3 km E Giano dell'Umbria (PG), on

  • 20-06-2021 20:16:31 (UTC)
  • 20-06-2021 22:16:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8400, 12.6130 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
Giano dell'Umbria PG 3 3846 3846
Castel Ritaldi PG 5 3278 7124
Montefalco PG 7 5679 12803
Gualdo Cattaneo PG 9 6155 18958
Massa Martana PG 10 3770 22728
Bevagna PG 11 5081 27809
Trevi PG 12 8469 36278
Campello sul Clitunno PG 14 2442 38720
Foligno PG 15 57155 95875
Spoleto PG 16 38218 134093
Collazzone PG 16 3473 137566
Acquasparta TR 17 4778 142344
Cannara PG 18 4305 146649
Spello PG 18 8645 155294
Todi PG 18 16851 172145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SW of Foligno (57155 inhabitants)
31 Km N of Terni (111501 inhabitants)
35 Km SE of Perugia (166134 inhabitants)
63 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
91 Km W of Teramo (54892 inhabitants)
92 Km SE of Arezzo (99543 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
99 Km N of Tivoli (56533 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 2021-06-20
20:16:31		 42.8397 12.6133 10 2021-06-20
20:25:32		 Sala Sismica INGV-Roma 91616471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-20 20:16:31 ± 0.05
Latitude 42.8397 ± 0.0027
Longitude 12.6133 ± 0.0086
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 91616471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 731
Semi-minor axis of confidence ellipse (meter) 256
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 284
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39840
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 91616471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-20 20:25:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIPA.HHZ. 2021-06-20T20:17:50.15 3.0 undecidable manual Pg 7.24 0
IV.RESU.HHZ. 2021-06-20T20:17:47.58 3.0 undecidable manual Pn -4.64 0
CR.STON.BHZ. 2021-06-20T20:17:32.76 3.0 negative manual Pn 2.39 0
MN.TRI.HHZ. 2021-06-20T20:17:18.68 3.0 negative manual Pn 0.3 0
IV.MNTV.EHZ. 2021-06-20T20:17:15.27 3.0 negative manual Pn 1.94 0
IV.VENT.EHZ. 2021-06-20T20:17:12.46 3.0 negative manual Pg 3.75 0
IV.CPGN.EHZ. 2021-06-20T20:17:00.91 3.0 undecidable manual S -2.77 0
IV.LRP.EHZ. 2021-06-20T20:16:58.69 3.0 undecidable manual Pg 0.01 0
IV.FIR.HHZ. 2021-06-20T20:16:54.63 3.0 undecidable manual Pn -0.92 0
IV.CESI.HHE. 2021-06-20T20:16:42.18 0.3 undecidable manual S 52 29.9478 50 -0.12 72
IV.GAVE.EHZ. 2021-06-20T20:16:41.76 0.3 undecidable manual S 125 28.1496 50 -0.06 73
IV.ASSB.HHZ. 2021-06-20T20:16:40.08 0.3 undecidable manual S 9 22.8549 114 -0.25 71
IV.FDMO.HHZ. 2021-06-20T20:16:40.10 0.3 undecidable manual P 60 44.2224 50 0.09 71
IV.CESX.HHZ. 2021-06-20T20:16:40.99 0.3 undecidable manual S 185 25.752 50 -0.19 71
IV.ATCC.EHZ. 2021-06-20T20:16:39.13 0.3 undecidable manual P 3 38.4282 50 0.03 72
IV.NRCA.HHZ. 2021-06-20T20:16:39.46 0.6 undecidable manual P 91 40.7259 50 -0.01 48
IV.ARRO.EHZ. 2021-06-20T20:16:38.25 0.3 undecidable manual P 157 31.4463 50 0.21 70
IV.CESX.HHZ. 2021-06-20T20:16:37.09 0.3 undecidable manual P 185 25.752 50 -0.06 73
IV.GAVE.EHZ. 2021-06-20T20:16:37.53 0.3 undecidable manual P 125 28.1496 50 0.01 74
IV.CESI.HHE. 2021-06-20T20:16:37.87 0.3 undecidable manual P 52 29.9478 50 0.06 73
IV.ASSB.HHZ. 2021-06-20T20:16:36.84 0.3 undecidable manual P 9 22.8549 114 0.18 72
IV.MOMA.HHE. 2021-06-20T20:16:35.41 0.3 undecidable manual S 222 5.2947 152 -0.23 73
IT.GNU.HGN. 2021-06-20T20:16:35.61 0.3 undecidable manual S 222 5.2947 152 -0.03 76
IT.GNU.HGN. 2021-06-20T20:16:34.09 0.1 undecidable manual P 222 5.2947 152 0.14 100
IV.MOMA.HHE. 2021-06-20T20:16:34.08 0.1 undecidable manual P 222 5.2947 152 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.0 0.00007152771500000001 0.2048 AML other m 2021-06-20T20:16:40.57
IV.ASSB.HHE. ML:1.0 0.00005887222 0.0768 AML other m 2021-06-20T20:16:40.98
IV.CESX.HHE. ML:0.8 0.00004208722500000001 0.1792 AML other m 2021-06-20T20:16:41.44
IV.CESX.HHN. ML:0.8 0.0000396969 0.1792 AML other m 2021-06-20T20:16:43.19
IV.GAVE.EHE. ML:1.1 0.00006035 0.5 AML other m 2021-06-20T20:16:42.24
IV.GAVE.EHN. ML:0.9 0.000047445205000000005 0.1536 AML other m 2021-06-20T20:16:42.65
IV.NRCA.HHN. ML:1.0 0.00003025 1.44 AML other m 2021-06-20T20:16:46.10
IV.ATCC.EHN. ML:0.8 0.000027046564999999997 0.32 AML other m 2021-06-20T20:16:45.61
IV.ATCC.EHE. ML:0.8 0.000025267385000000004 0.32 AML other m 2021-06-20T20:16:46.46
IV.NRCA.HHE. ML:1.0 0.00003135 0.46 AML other m 2021-06-20T20:16:46.89
IV.ARRO.EHE. ML:0.6 0.00002102367 0.2816 AML other m 2021-06-20T20:16:43.61
IV.ARRO.EHN. ML:0.6 0.00001827686 0.1536 AML other m 2021-06-20T20:16:44.52
IV.FDMO.HHE. ML:0.5 0.000009698341999999998 0.2176 AML other m 2021-06-20T20:16:48.85
IV.FDMO.HHN. ML:0.5 0.000009875744500000001 0.1536 AML other m 2021-06-20T20:16:47.79
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