Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 01-11-2021 and time 13:22:39 (Italy) in region 4 km NE Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 4 km NE Norcia (PG), on

  • 01-11-2021 12:22:39 (UTC)
  • 01-11-2021 13:22:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8260, 13.1100 at 11 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 4 4957 4957
Preci PG 8 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 12 1107 7069
Ussita MC 13 444 7513
Cascia PG 14 3217 10730
Cerreto di Spoleto PG 16 1075 11805
Arquata del Tronto AP 16 1178 12983
Sellano PG 17 1079 14062
Montegallo AP 18 523 14585
Accumoli RI 18 667 15252
Poggiodomo PG 19 117 15369
Montemonaco AP 20 604 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
58 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km W of Pescara (121014 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 1.0 2021-11-01
12:22:39		 42.8262 13.1105 11 2021-11-01
12:27:35		 Sala Sismica INGV-Roma 97142011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-01 12:22:39 ± 0.04
Latitude 42.8262 ± 0.0027
Longitude 13.1105 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97142011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 299
Semi-minor axis of confidence ellipse (meter) 241
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
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) 90
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41549
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 97142011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-01 12:27:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RCAV.EHZ. 2021-11-01T12:22:56.40 3.0 undecidable manual P -0.02 0
IV.TERO.HHZ. 2021-11-01T12:22:54.93 0.3 undecidable manual S 119 46.1205 50 0.14 69
IV.CSP1.EHZ. 2021-11-01T12:22:50.55 0.3 undecidable manual S 15 30.4473 50 -0.06 72
IV.LNSS.HHZ. 2021-11-01T12:22:49.47 0.3 undecidable manual S 193 25.4523 50 0.2 70
IV.CESI.HHZ. 2021-11-01T12:22:49.34 0.1 undecidable manual S 320 25.9518 50 -0.07 96
IV.TERO.HHZ. 2021-11-01T12:22:48.38 0.1 undecidable manual P 119 46.1205 50 -0.13 92
IV.FDMO.HHZ. 2021-11-01T12:22:48.51 0.6 undecidable manual S 355 23.4543 50 -0.22 47
IV.GAVE.EHZ. 2021-11-01T12:22:48.51 0.3 undecidable manual S 230 23.0547 50 -0.12 72
IV.MTRA.EHZ. 2021-11-01T12:22:48.91 0.3 undecidable manual S 108 24.5532 50 -0.12 72
IV.CSP1.EHZ. 2021-11-01T12:22:46.13 0.1 undecidable manual P 15 30.4473 50 0.03 96
IV.MC2.EHZ. 2021-11-01T12:22:45.41 0.3 undecidable manual S 34 11.3775 133 0.05 74
IV.MTRA.EHZ. 2021-11-01T12:22:45.09 0.1 undecidable manual P 108 24.5532 50 -0.09 96
IV.LNSS.HHZ. 2021-11-01T12:22:45.27 0.1 undecidable manual P 193 25.4523 50 -0.05 97
IV.FDMO.HHZ. 2021-11-01T12:22:45.12 0.1 undecidable manual P 355 23.4543 50 0.11 96
IV.CESI.HHZ. 2021-11-01T12:22:45.51 0.1 undecidable manual P 320 25.9518 50 0.11 96
IV.GAVE.EHZ. 2021-11-01T12:22:45.00 0.3 undecidable manual P 230 23.0547 50 0.05 73
IV.MC2.EHZ. 2021-11-01T12:22:43.28 0.1 undecidable manual P 34 11.3775 133 0.22 96
IV.NRCA.HHZ. 2021-11-01T12:22:43.31 0.3 undecidable manual S 20 0.8991 175 -0.34 71
IV.NRCA.HHZ. 2021-11-01T12:22:42.18 0.1 undecidable manual P 20 0.8991 175 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.2 0.00009355 1.56 AML other m 2021-11-01T12:22:49.03
IV.LNSS.HHE. ML:1.0 0.000052499999999999995 1.36 AML other m 2021-11-01T12:22:49.00
IV.GAVE.EHN. ML:1.0 0.000072 0.48 AML other m 2021-11-01T12:22:50.28
IV.LNSS.HHN. ML:0.9 0.000050050000000000004 1.38 AML other m 2021-11-01T12:22:50.93
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