Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 21-06-2021 and time 05:18:13 (Italy) in region 1 km NW Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 1 km NW Norcia (PG), on

  • 21-06-2021 03:18:13 (UTC)
  • 21-06-2021 05:18:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8030, 13.0870 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
Preci PG 9 724 5681
Cascia PG 11 3217 8898
Castelsantangelo sul Nera MC 12 281 9179
Cerreto di Spoleto PG 14 1075 10254
Visso MC 14 1107 11361
Poggiodomo PG 16 117 11478
Sellano PG 16 1079 12557
Ussita MC 16 444 13001
Arquata del Tronto AP 18 1178 14179
Accumoli RI 18 667 14846
Vallo di Nera PG 19 364 15210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
53 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
100 Km W of Pescara (121014 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 0.9 2021-06-21
03:18:13		 42.8033 13.0873 10 2021-06-21
03:27:43		 Sala Sismica INGV-Roma 91629491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-21 03:18:13 ± 0.06
Latitude 42.8033 ± 0.0036
Longitude 13.0873 ± 0.0049
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 91629491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 433
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 307
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25091
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 91629491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-21 03:27:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-06-21T03:18:38.21 3.0 undecidable manual S -0.47 0
IV.FDMO.HHZ. 2021-06-21T03:18:23.11 0.1 undecidable manual S 360 25.8519 50 -0.03 97
IV.SMA1.EHZ. 2021-06-21T03:18:23.75 0.1 undecidable manual S 133 27.8499 50 0.08 96
IV.GAVE.EHZ. 2021-06-21T03:18:21.28 0.1 undecidable manual S 232 19.9689 117 -0.15 96
IV.MMO1.EHZ. 2021-06-21T03:18:21.93 0.3 undecidable manual S 61 22.1556 115 -0.19 71
IV.SMA1.EHZ. 2021-06-21T03:18:19.28 0.3 undecidable manual P 133 27.8499 50 -0.14 71
IV.FDMO.HHZ. 2021-06-21T03:18:19.13 0.1 undecidable manual P 360 25.8519 50 0.01 97
IV.GAVE.EHZ. 2021-06-21T03:18:18.23 0.1 undecidable manual P 232 19.9689 117 0.1 97
IV.MMO1.EHZ. 2021-06-21T03:18:18.58 0.3 undecidable manual P 61 22.1556 115 0.05 73
IV.NRCA.HHZ. 2021-06-21T03:18:17.41 0.1 undecidable manual S 33 3.996 159 -0.06 100
IV.NRCA.HHZ. 2021-06-21T03:18:16.11 0.1 undecidable manual P 33 3.996 159 0.27 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.3 0.00035150000000000003 0.36 AML other m 2021-06-21T03:18:17.66
IV.NRCA.HHN. ML:1.6 0.000637 0.08 AML other m 2021-06-21T03:18:17.47
IV.NRCA.HNN. ML:1.5 0.000558 0.08 AML other m 2021-06-21T03:18:17.47
IV.NRCA.HHE. ML:1.3 0.000363 0.18 AML other m 2021-06-21T03:18:17.52
IV.FDMO.HHN. ML:0.2 0.000011400000000000001 1.08 AML other m 2021-06-21T03:18:23.78
IV.FDMO.HHE. ML:0.4 0.000014364999999999999 0.82 AML other m 2021-06-21T03:18:24.01
IV.SMA1.EHE. ML:0.5 0.0000162 1.28 AML other m 2021-06-21T03:18:26.99
IV.SMA1.EHN. ML:0.6 0.00002 0.52 AML other m 2021-06-21T03:18:28.88
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