Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 20-06-2021 and time 15:43:17 (UTC) in region 1 km E Norcia (PG)

A magnitude ML 0.8 earthquake occured in region: 1 km E Norcia (PG), on

  • 20-06-2021 15:43:17 (UTC)
  • 20-06-2021 17:43:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7920, 13.1050 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
Norcia PG 1 4957 4957
Cascia PG 11 3217 8174
Preci PG 11 724 8898
Castelsantangelo sul Nera MC 12 281 9179
Visso MC 16 1107 10286
Cerreto di Spoleto PG 16 1075 11361
Arquata del Tronto AP 16 1178 12539
Accumoli RI 16 667 13206
Poggiodomo PG 16 117 13323
Ussita MC 17 444 13767
Sellano PG 18 1079 14846
Montegallo AP 20 523 15369
Cittareale RI 20 482 15851
Vallo di Nera PG 20 364 16215
Monteleone di Spoleto PG 20 599 16814

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
98 Km W of Pescara (121014 inhabitants)
100 Km W of Chieti (51815 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
15:43:17		 42.7923 13.1052 10 2021-06-20
15:51:33		 Sala Sismica INGV-Roma 91606581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-20 15:43:17 ± 0.05
Latitude 42.7923 ± 0.0027
Longitude 13.1052 ± 0.0061
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 91606581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 517
Semi-minor axis of confidence ellipse (meter) 297
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 14
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) 0.40380
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 12
Type of magnitude ML
Reference to an origin 91606581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-20 15:51:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.CIMO.HHZ. 2021-06-20T15:44:51.82 3.0 undecidable manual Sn -4.39 0
IV.MSSA.HHZ. 2021-06-20T15:44:43.50 3.0 undecidable manual Sn 0.27 0
IV.PZUN.HHZ. 2021-06-20T15:44:42.65 3.0 undecidable manual Sn 1.52 0
MN.CLTB.HHZ. 2021-06-20T15:44:34.48 3.0 positive manual Pn -1.08 0
IV.MTGR.HHZ. 2021-06-20T15:44:31.40 3.0 negative manual Pn 0.07 0
CH.BERNI.HHZ. 2021-06-20T15:44:31.45 3.0 undecidable manual Pg 9 0
GU.RNCA.HHZ. 2021-06-20T15:44:19.50 3.0 undecidable manual Pg 7.86 0
GU.CARD.HHZ. 2021-06-20T15:43:55.78 3.0 undecidable manual Pn 0.29 0
IV.LAV9.HHZ. 2021-06-20T15:43:52.86 3.0 undecidable manual S -4.41 0
IV.LRP.EHZ. 2021-06-20T15:43:38.64 3.0 undecidable manual P -1.88 0
IV.SMA1.EHZ. 2021-06-20T15:43:27.46 0.3 undecidable manual S 134 25.9518 111 0.39 69
IV.FDMO.HHZ. 2021-06-20T15:43:27.30 0.3 undecidable manual S 357 27.1506 50 -0.12 74
IV.TERO.HHZ. 2021-06-20T15:43:25.81 0.3 undecidable manual P 115 44.8218 50 -0.12 71
IV.LNSS.HNE. 2021-06-20T15:43:25.51 0.3 undecidable manual S 194 21.6672 114 -0.19 72
IV.GAVE.EHZ. 2021-06-20T15:43:25.40 0.3 undecidable manual S 237 20.4684 116 0.08 74
IV.CSP1.EHZ. 2021-06-20T15:43:24.46 0.3 undecidable manual P 14 34.1436 50 0.17 71
IV.CESI.HNN. 2021-06-20T15:43:23.41 0.1 undecidable manual P 325 28.6491 50 -0.03 99
IV.FDMO.HHZ. 2021-06-20T15:43:23.19 0.3 undecidable manual P 357 27.1506 50 -0.01 74
IV.RM33.EHZ. 2021-06-20T15:43:23.91 0.3 undecidable manual P 164 32.6451 50 -0.15 72
IV.SMA1.EHZ. 2021-06-20T15:43:22.80 0.3 undecidable manual P 134 25.9518 111 -0.2 72
IV.LNSS.HNE. 2021-06-20T15:43:22.26 0.3 undecidable manual P 194 21.6672 114 0.05 75
IV.GAVE.EHZ. 2021-06-20T15:43:22.16 0.6 undecidable manual P 237 20.4684 116 0.17 49
IV.NRCA.HHZ. 2021-06-20T15:43:21.08 0.1 undecidable manual S 9 4.5954 155 -0.12 99
IV.NRCA.HHZ. 2021-06-20T15:43:19.82 0.1 undecidable manual P 9 4.5954 155 0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0.6 0.000026898699999999997 0.1536 AML other m 2021-06-20T15:43:27.78
IV.FDMO.HHE. ML:0.4 0.0000157 0.22 AML other m 2021-06-20T15:43:27.70
IV.FDMO.HHN. ML:0.4 0.000017250000000000003 0.28 AML other m 2021-06-20T15:43:28.10
IV.SMA1.EHE. ML:0.8 0.00003705 0.46 AML other m 2021-06-20T15:43:28.57
IV.RM33.EHN. ML:0.8 0.000023650000000000002 0.12 AML other m 2021-06-20T15:43:28.86
IV.RM33.EHE. ML:0.7 0.00001760788 0.1152 AML other m 2021-06-20T15:43:29.13
IV.NRCA.HHE. ML:1.5 0.0005166980999999999 0.0896 AML other m 2021-06-20T15:43:21.16
IV.NRCA.HHN. ML:1.6 0.0006638525 0.1664 AML other m 2021-06-20T15:43:21.15
IV.NRCA.HNE. ML:1.5 0.0005064108 0.1024 AML other m 2021-06-20T15:43:21.16
IV.NRCA.HNN. ML:1.5 0.00058849415 0.1536 AML other m 2021-06-20T15:43:21.24
IV.CSP1.EHE. ML:0.7 0.0000197504765 0.1408 AML other m 2021-06-20T15:43:29.97
IV.CSP1.EHN. ML:0.9 0.0000314596525 0.384 AML other m 2021-06-20T15:43:32.30
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