Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 30-01-2021 and time 21:25:06 (Italy) in region 3 km N Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 3 km N Norcia (PG), on

  • 30-01-2021 20:25:06 (UTC)
  • 30-01-2021 21:25:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8200, 13.1050 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.

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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 3 4957 4957
Preci PG 9 724 5681
Castelsantangelo sul Nera MC 9 281 5962
Visso MC 13 1107 7069
Cascia PG 13 3217 10286
Ussita MC 14 444 10730
Cerreto di Spoleto PG 15 1075 11805
Sellano PG 16 1079 12884
Arquata del Tronto AP 17 1178 14062
Accumoli RI 18 667 14729
Poggiodomo PG 18 117 14846
Montegallo AP 19 523 15369

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Perugia (166134 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km N of Tivoli (56533 inhabitants)
99 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 2021-01-30
20:25:06		 42.8198 13.1047 11 2021-01-30
20:35:58		 Sala Sismica INGV-Roma 86726081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-30 20:25:06 ± 0.08
Latitude 42.8198 ± 0.0036
Longitude 13.1047 ± 0.0086
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 86726081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 690
Semi-minor axis of confidence ellipse (meter) 356
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25361
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 86726081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-30 20:35:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.VLO.HHZ. 2021-01-30T20:26:33.30 3.0 positive manual Pg 14.65 0
IV.MCRV.HHZ. 2021-01-30T20:26:19.20 3.0 undecidable manual Sn 3.36 0
CH.PLONS.HHZ. 2021-01-30T20:26:09.05 3.0 undecidable manual Pn -0.34 0
ST.ZIAN.EHZ. 2021-01-30T20:26:04.29 3.0 undecidable manual Pg 14.48 0
IV.MAGO.CHZ. 2021-01-30T20:25:55.72 3.0 undecidable manual Sg 1.76 0
IX.SFL3.HNZ.01 2021-01-30T20:25:50.07 3.0 positive manual Pn 4.99 0
IV.RNI2.HHZ. 2021-01-30T20:25:44.52 3.0 undecidable manual Sn -2.79 0
IV.BRSN.EHZ. 2021-01-30T20:25:37.74 3.0 undecidable manual Sn -3.48 0
IT.FIE.HGZ. 2021-01-30T20:25:32.60 3.0 negative manual Pg 6.82 0
IV.RNI2.HHZ. 2021-01-30T20:25:26.90 3.0 undecidable manual Pn 0.07 0
IV.RIBO.EHZ.01 2021-01-30T20:25:24.56 3.0 undecidable manual Pn -2.41 0
IV.OFFI.HHZ. 2021-01-30T20:25:22.87 3.0 undecidable manual Sn 5.06 0
IV.SMA1.EHZ. 2021-01-30T20:25:16.16 0.3 undecidable manual S 138 28.1496 91 -0.07 72
IV.T1299.EHE. 2021-01-30T20:25:15.70 0.6 undecidable manual S 145 25.1526 91 0.28 46
IV.LNSS.HNZ. 2021-01-30T20:25:15.22 0.6 undecidable manual S 192 24.6531 91 -0.06 48
IV.FDMO.HHZ. 2021-01-30T20:25:14.85 0.3 undecidable manual S 357 24.0537 91 -0.27 69
IV.CRTC.HHZ. 2021-01-30T20:25:14.56 3.0 undecidable manual P 1.35 0
IV.GAVE.EHZ. 2021-01-30T20:25:13.14 3.0 undecidable manual P 0.72 0
IV.MMO1.EHZ. 2021-01-30T20:25:13.75 0.6 undecidable manual S 64 20.0688 92 -0.31 46
IV.MC2.EHZ. 2021-01-30T20:25:12.30 0.3 undecidable manual S 34 12.2766 109 0.31 69
IV.CSP1.EHZ. 2021-01-30T20:25:12.64 3.0 undecidable manual Sn -0.08 0
IV.SMA1.EHZ. 2021-01-30T20:25:11.81 0.3 undecidable manual P 138 28.1496 91 -0.19 70
IV.FDMO.HHZ. 2021-01-30T20:25:11.58 0.1 undecidable manual P 357 24.0537 91 0.21 93
IV.T1299.EHE. 2021-01-30T20:25:11.59 0.3 undecidable manual P 145 25.1526 91 0.05 72
IV.LNSS.HNZ. 2021-01-30T20:25:11.40 0.3 undecidable manual P 192 24.6531 91 -0.06 72
IT.MTCL.HGZ. 2021-01-30T20:25:10.95 0.3 undecidable manual P 336 21.0678 92 0.04 73
IV.MMO1.EHZ. 2021-01-30T20:25:10.63 0.1 undecidable manual P 64 20.0688 92 -0.13 96
IV.NRCA.HHZ. 2021-01-30T20:25:09.76 0.6 undecidable manual S 27 1.6983 169 -0.43 48
IV.MC2.EHZ. 2021-01-30T20:25:09.76 0.6 positive manual P 34 12.2766 109 0.2 47
IV.NRCA.HHZ. 2021-01-30T20:25:08.51 0.1 undecidable manual P 27 1.6983 169 -0.01 100
IV.CESI.HHZ. 2021-01-30T20:25:08.58 3.0 undecidable manual P -0.71 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.000242 0.16 AML other m 2021-01-30T20:25:09.87
IV.NRCA.HHE. ML:1.4 0.000407 0.18 AML other m 2021-01-30T20:25:09.96
IV.NRCA.HNE. ML:1.4 0.0003991456 0.1792 AML other m 2021-01-30T20:25:09.96
IV.NRCA.HNN. ML:1.1 0.00020231125 0.1536 AML other m 2021-01-30T20:25:09.87
IV.FDMO.HHE. ML:0.2 0.000010141198 0.1152 AML other m 2021-01-30T20:25:15.35
IV.FDMO.HHN. ML:0.5 0.00001913413 1.1392 AML other m 2021-01-30T20:25:15.86
IV.SMA1.EHE. ML:0.6 0.000021849595500000003 0.4096 AML other m 2021-01-30T20:25:18.53
IV.SMA1.EHN. ML:0.6 0.00002221407 0.832 AML other m 2021-01-30T20:25:16.44
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