Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 14-12-2021 and time 09:27:22 (UTC) in region 5 km NE Norcia (PG)

A magnitude ML 1.4 earthquake occured in region: 5 km NE Norcia (PG), on

  • 14-12-2021 09:27:22 (UTC)
  • 14-12-2021 10:27:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8280, 13.1350 at 3 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 5 4957 4957
Castelsantangelo sul Nera MC 8 281 5238
Preci PG 10 724 5962
Visso MC 12 1107 7069
Ussita MC 13 444 7513
Arquata del Tronto AP 15 1178 8691
Cascia PG 16 3217 11908
Montegallo AP 16 523 12431
Accumoli RI 17 667 13098
Montemonaco AP 18 604 13702
Cerreto di Spoleto PG 18 1075 14777
Sellano PG 18 1079 15856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
93 Km SW of Ancona (100861 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
97 Km W of Pescara (121014 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
100 Km NW of Chieti (51815 inhabitants)
100 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 		Md 1.3
ML 1.4 		2021-12-14
09:27:22		 42.8278 13.1347 3 2021-12-14
09:56:36		 Sala Sismica INGV-Roma 98499941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-14 09:27:22 ± 0.12
Latitude 42.8278 ± 0.0045
Longitude 13.1347 ± 0.0061
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98499941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 540
Semi-minor axis of confidence ellipse (meter) 117
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 163
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26890
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 3
Type of magnitude ML
Reference to an origin 98499941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-14 09:56:36

Md:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 4
Type of magnitude Md
Reference to an origin 98499941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-14 09:56:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.TRI.HHZ. 2021-12-14T09:28:59.91 3.0 undecidable manual Sg 8.49 0
IV.GIZZ.HHZ. 2021-12-14T09:28:59.66 3.0 undecidable manual Sg 9.66 0
IV.IFIL.HHZ. 2021-12-14T09:28:46.78 3.0 undecidable manual Sg 0.99 0
IV.GRIS.EHZ. 2021-12-14T09:28:40.16 3.0 undecidable manual Sg 9 0
IV.IMOL.HNZ. 2021-12-14T09:28:33.19 3.0 undecidable manual Sg 8.4 0
MN.BNI.HHZ. 2021-12-14T09:28:31.48 3.0 positive manual Pn -1.84 0
IV.FVI.HHZ. 2021-12-14T09:28:28.59 3.0 positive manual Pg 10.41 0
AC.PUK.HHZ. 2021-12-14T09:28:26.51 3.0 undecidable manual Pn 5.06 0
MN.TRI.HHZ. 2021-12-14T09:28:20.97 3.0 negative manual Pg 15.04 0
GU.BURY.HHZ. 2021-12-14T09:28:20.26 3.0 undecidable manual Pg 2.35 0
IV.PZUN.HHZ. 2021-12-14T09:28:13.52 3.0 undecidable manual Sn -1.77 0
IV.PESA.HHZ. 2021-12-14T09:28:10.97 3.0 undecidable manual Sg 2.2 0
IX.SFL3.HNZ.01 2021-12-14T09:28:09.25 3.0 undecidable manual Sn -0.55 0
IV.CAVE.HHZ. 2021-12-14T09:28:08.95 3.0 negative manual Pg 8.39 0
IV.FREG.EHZ. 2021-12-14T09:28:06.75 3.0 positive manual Pn -4.09 0
IV.MTTG.HHZ. 2021-12-14T09:28:05.12 3.0 undecidable manual Pn -8.99 0
IV.IMOL.HNZ. 2021-12-14T09:27:55.27 3.0 positive manual Pg 4.3 0
IV.ATMI.HHZ. 2021-12-14T09:27:55.28 3.0 undecidable manual Sg -3.06 0
IV.MCEL.HHZ. 2021-12-14T09:27:44.39 3.0 undecidable manual Pn -3.99 0
IV.CESI.HHZ. 2021-12-14T09:27:32.09 0.3 undecidable manual S 317 27.1506 97 -0.17 70
IV.CSP1.EHZ. 2021-12-14T09:27:32.99 0.3 undecidable manual S 11 29.8479 96 -0.21 69
IV.GAVE.EHE. 2021-12-14T09:27:31.89 0.3 undecidable manual S 233 24.6531 97 0.47 66
IV.PAOL.HHZ. 2021-12-14T09:27:31.02 3.0 negative manual Pn -1.35 0
IV.MTRA.EHN. 2021-12-14T09:27:30.85 0.3 undecidable manual S 110 22.755 98 0.1 72
IV.CSP1.EHZ. 2021-12-14T09:27:29.01 0.3 undecidable manual P 11 29.8479 96 0.22 69
IV.BSSO.HHZ. 2021-12-14T09:27:29.79 3.0 undecidable manual P 1.58 0
IV.MMO1.EHZ. 2021-12-14T09:27:28.90 0.3 undecidable manual S 63 17.5713 100 -0.07 73
IV.GAVE.EHE. 2021-12-14T09:27:27.61 0.3 undecidable manual P 233 24.6531 97 -0.17 71
IV.MTRA.EHN. 2021-12-14T09:27:27.11 0.3 undecidable manual P 110 22.755 98 -0.28 69
IV.CESI.HHZ. 2021-12-14T09:27:27.83 0.1 undecidable manual P 317 27.1506 97 -0.43 89
IV.FDMO.HHE. 2021-12-14T09:27:27.96 0.1 undecidable manual P 351 23.4543 98 0.43 89
IV.MMO1.EHZ. 2021-12-14T09:27:26.14 0.1 undecidable manual P 63 17.5713 100 -0.21 94
IV.MC2.EHZ. 2021-12-14T09:27:26.93 0.3 undecidable manual S 25 10.2786 107 0.41 69
IV.MC2.EHZ. 2021-12-14T09:27:25.05 0.1 undecidable manual P 25 10.2786 107 0.11 98
IV.NRCA.HHZ. 2021-12-14T09:27:23.45 0.1 undecidable manual P 291 1.7982 151 -0.07 100
IV.NRCA.HHZ. 2021-12-14T09:27:23.97 0.3 undecidable manual S 291 1.7982 151 -0.08 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.0 0.0016924079999999998 0.1408 AML other m 2021-12-14T09:27:24.08
IV.NRCA.HNN. ML:0.0 0.0015319045 0.1472 AML other m 2021-12-14T09:27:24.08
IV.NRCA.HHE. ML:0.0 0.0014095420000000002 0.1792 AML other m 2021-12-14T09:27:23.98
IV.MC2.EHN. ML:1.5 0.0005558062 0.2368 AML other m 2021-12-14T09:27:27.71
IV.MC2.EHE. ML:1.5 0.00063793625 0.1984 AML other m 2021-12-14T09:27:27.81
IV.MMO1.EHE. ML:0.6 0.000032555815 0.1984 AML other m 2021-12-14T09:27:29.09
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