Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-09-2022 and time 12:05:12 (UTC) in region 4 km N Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km N Norcia (PG), on

  • 20-09-2022 12:05:12 (UTC)
  • 20-09-2022 14:05:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8310, 13.0920 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 4 4957 4957
Preci PG 7 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 11 1107 7069
Ussita MC 13 444 7513
Cascia PG 14 3217 10730
Cerreto di Spoleto PG 14 1075 11805
Sellano PG 15 1079 12884
Arquata del Tronto AP 18 1178 14062
Poggiodomo PG 18 117 14179
Monte Cavallo MC 20 145 14324
Accumoli RI 20 667 14991
Vallo di Nera PG 20 364 15355
Montegallo AP 20 523 15878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
65 Km E of Perugia (166134 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
97 Km NE 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 1.1 2022-09-20
12:05:12		 42.8307 13.0917 10 2022-09-20
12:09:08		 Sala Sismica INGV-Roma 109928671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-09-20 12:05:12 ± 0.04
Latitude 42.8307 ± 0.0018
Longitude 13.0917 ± 0.0037
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 109928671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 141
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 285
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
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) 0.01709
Epicentral distance of station farthest from the epicenter (degree) 0.38131
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 109928671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-09-20 12:09:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2022-09-20T12:05:26.67 0.6 undecidable manual S 304 42.3243 50 0.31 45
IV.MF5.EHZ. 2022-09-20T12:05:24.78 0.6 undecidable manual S 60 34.6431 50 0.47 44
IV.RM33.EHZ. 2022-09-20T12:05:24.94 0.6 undecidable manual S 164 37.0296 50 -0.02 48
IV.MML1.EHZ. 2022-09-20T12:05:23.78 0.6 undecidable manual S 343 32.8449 50 -0.06 48
IV.GUMA.HHZ. 2022-09-20T12:05:23.79 0.6 undecidable manual S 37 32.4453 50 0.05 48
IV.CSP1.EHZ. 2022-09-20T12:05:22.79 0.6 undecidable manual S 18 30.4473 50 -0.4 45
IV.LNSS.HHZ. 2022-09-20T12:05:21.63 0.6 undecidable manual S 189 25.5522 110 -0.13 48
IV.CESI.HHZ. 2022-09-20T12:05:21.44 0.6 undecidable manual S 322 24.5532 111 0.01 49
IV.ASSB.HHZ. 2022-09-20T12:05:20.39 1.0 negative manual P 304 42.3243 50 -0.02 24
IV.FDMO.HHZ. 2022-09-20T12:05:20.61 0.6 undecidable manual S 359 22.8549 113 -0.26 47
IV.GAVE.EHZ. 2022-09-20T12:05:20.80 0.6 undecidable manual S 226 22.2555 113 0.13 48
IV.RM33.EHZ. 2022-09-20T12:05:19.31 1.0 undecidable manual P 164 37.0296 50 -0.29 23
IV.MF5.EHZ. 2022-09-20T12:05:19.12 1.0 undecidable manual P 60 34.6431 50 -0.11 24
IV.CSP1.EHZ. 2022-09-20T12:05:18.31 1.0 undecidable manual P 18 30.4473 50 -0.27 23
IV.GUMA.HHZ. 2022-09-20T12:05:18.82 0.3 negative manual P 37 32.4453 50 -0.08 71
IV.MML1.EHZ. 2022-09-20T12:05:18.97 0.1 undecidable manual P 343 32.8449 50 0.01 96
IV.FDMO.HHZ. 2022-09-20T12:05:17.21 0.6 negative manual P 359 22.8549 113 -0.03 49
IV.GAVE.EHZ. 2022-09-20T12:05:17.20 0.1 undecidable manual P 226 22.2555 113 0.07 97
IV.MC2.EHZ. 2022-09-20T12:05:17.68 0.3 undecidable manual S 41 11.9769 129 0.09 74
IV.LNSS.HHZ. 2022-09-20T12:05:17.64 0.1 undecidable manual P 189 25.5522 110 -0.11 96
IV.CESI.HHZ. 2022-09-20T12:05:17.56 0.1 positive manual P 322 24.5532 111 0 98
IV.NRCA.HHZ. 2022-09-20T12:05:15.51 0.6 undecidable manual S 80 1.8981 169 -0.14 50
IV.MC2.EHZ. 2022-09-20T12:05:15.46 0.1 undecidable manual P 41 11.9769 129 0.12 98
IV.NRCA.HHZ. 2022-09-20T12:05:14.32 0.1 undecidable manual P 80 1.8981 169 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MC2.EHE. ML:1.5 0.000368 1.42 AML other m 2022-09-20T12:05:18.07
IV.MC2.EHN. ML:1.6 0.0004745 0.28 AML other m 2022-09-20T12:05:18.79
IV.FDMO.HHE. ML:0.8 0.0000436 1.2 AML other m 2022-09-20T12:05:21.12
IV.GAVE.EHN. ML:1.0 0.00007435 0.1 AML other m 2022-09-20T12:05:21.16
IV.FDMO.HHN. ML:1.0 0.0000592 0.98 AML other m 2022-09-20T12:05:21.26
IV.CESI.HHN. ML:1.3 0.0001245 0.24 AML other m 2022-09-20T12:05:21.71
IV.LNSS.HHN. ML:1.1 0.00007264999999999999 1.28 AML other m 2022-09-20T12:05:21.79
IV.LNSS.HHE. ML:1.1 0.0000746 0.14 AML other m 2022-09-20T12:05:21.90
IV.CESI.HHE. ML:1.0 0.0000628 1.28 AML other m 2022-09-20T12:05:22.06
IV.GAVE.EHE. ML:1.1 0.00008044999999999999 0.16 AML other m 2022-09-20T12:05:22.88
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