Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 30-09-2021 and time 14:02:07 (Italy) in region 1 km SE Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 1 km SE Norcia (PG), on

  • 30-09-2021 12:02:07 (UTC)
  • 30-09-2021 14:02:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7860, 13.1090 at 12 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Cascia PG 11 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Accumoli RI 15 667 9846
Arquata del Tronto AP 16 1178 11024
Cerreto di Spoleto PG 16 1075 12099
Visso MC 16 1107 13206
Poggiodomo PG 16 117 13323
Ussita MC 18 444 13767
Sellano PG 19 1079 14846
Cittareale RI 19 482 15328
Montegallo AP 19 523 15851
Monteleone di Spoleto PG 20 599 16450

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
99 Km W of Chieti (51815 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
Bulletin
Rev1000 		ML 1.1 2021-09-30
12:02:07		 42.7863 13.1087 12 2022-03-30
13:04:11		 Bollettino Sismico Italiano INGV 96547001
Reviewed
Rev100 		ML 0.9 2021-09-30
12:02:08		 42.7838 13.1035 12 2021-09-30
12:15:57		 Sala Sismica INGV-Roma 96063881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-30 12:02:07 ± 0.04
Latitude 42.7863 ± 0.0027
Longitude 13.1087 ± 0.0025
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96547001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 258
Semi-minor axis of confidence ellipse (meter) 74
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 152
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41729
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 96547001
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-14 13:09:05

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96063881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-30 12:15:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2021-09-30T12:02:24.49 3.0 positive manual P -0.4 0
IV.MOMA.HNZ. 2021-09-30T12:02:22.39 0.6 undecidable manual S 273 43.9227 91 0.24 45
IV.TERO.HHZ. 2021-09-30T12:02:22.24 0.3 undecidable manual S 114 44.2224 91 -0.01 71
IV.ASSB.HHN. 2021-09-30T12:02:22.69 0.6 undecidable manual S 308 46.3203 91 -0.1 46
IV.ARRO.EHZ. 2021-09-30T12:02:20.09 0.6 undecidable manual S 231 36.2415 92 -0.01 48
IV.MML1.HNE. 2021-09-30T12:02:20.46 0.6 undecidable manual S 343 37.9287 92 -0.11 47
IV.CSP1.EHZ. 2021-09-30T12:02:19.93 0.3 undecidable manual S 13 34.743 92 0.21 69
IV.CESI.HHZ. 2021-09-30T12:02:18.11 0.3 undecidable manual S 326 29.3484 93 -0.17 71
IV.SMA1.EHN. 2021-09-30T12:02:17.40 0.3 undecidable manual S 133 25.2525 94 0.2 71
IV.FDMO.HHZ. 2021-09-30T12:02:17.70 0.3 undecidable manual S 356 27.8499 93 -0.16 71
IV.MMO1.EHN. 2021-09-30T12:02:16.25 0.6 undecidable manual S 55 21.7671 95 0.01 49
IV.MTRA.EHZ. 2021-09-30T12:02:16.70 0.3 undecidable manual S 98 23.6541 94 -0.06 73
IV.MOMA.HNZ. 2021-09-30T12:02:16.01 0.1 undecidable manual P 273 43.9227 91 -0.15 92
IV.TERO.HHZ. 2021-09-30T12:02:16.34 0.3 undecidable manual P 114 44.2224 91 0.12 69
IV.GAVE.EHZ. 2021-09-30T12:02:16.11 0.3 undecidable manual S 239 20.3685 96 0.23 71
IV.ASSB.HHN. 2021-09-30T12:02:16.76 0.3 undecidable manual P 308 46.3203 91 0.23 68
IV.LNSS.HHZ. 2021-09-30T12:02:15.92 0.3 undecidable manual S 195 21.0678 96 -0.15 71
IV.MML1.HNE. 2021-09-30T12:02:15.25 0.3 undecidable manual P 343 37.9287 92 0 72
IV.ARRO.EHZ. 2021-09-30T12:02:15.00 0.1 undecidable manual P 231 36.2415 92 0.03 96
IV.CSP1.EHZ. 2021-09-30T12:02:14.81 0.1 undecidable manual P 13 34.743 92 0.05 71
IV.MC2.EHZ. 2021-09-30T12:02:14.92 0.3 undecidable manual S 25 15.3735 105 0.36 69
IV.FDMO.HHZ. 2021-09-30T12:02:13.62 0.3 undecidable manual P 356 27.8499 93 -0.06 72
IV.CESI.HHZ. 2021-09-30T12:02:13.81 0.3 undecidable manual P 326 29.3484 93 -0.12 71
IV.SMA1.EHN. 2021-09-30T12:02:13.60 0.1 undecidable manual P 133 25.2525 94 0.3 92
IV.GAVE.EHZ. 2021-09-30T12:02:12.45 0.1 undecidable manual P 239 20.3685 96 -0.09 97
IV.NRCA.HHZ. 2021-09-30T12:02:12.29 0.1 undecidable manual S 5 5.2947 149 -0.12 98
IV.MMO1.EHN. 2021-09-30T12:02:12.42 0.1 undecidable manual P 55 21.7671 95 -0.33 92
IV.LNSS.HHZ. 2021-09-30T12:02:12.56 0.3 undecidable manual P 195 21.0678 96 -0.09 72
IV.MTRA.EHZ. 2021-09-30T12:02:12.86 0.1 undecidable manual P 98 23.6541 94 -0.19 95
IV.MC2.EHZ. 2021-09-30T12:02:11.92 0.3 undecidable manual P 25 15.3735 105 0.14 73
IV.NRCA.HHZ. 2021-09-30T12:02:10.64 0.1 undecidable manual P 5 5.2947 149 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.4 0.00038349999999999994 0.08 AML other m 2021-09-30T12:02:12.41
IV.NRCA.HHN. ML:1.2 0.000203 0.94 AML other m 2021-09-30T12:02:13.58
IV.LNSS.HHN. ML:1.1 0.0000847 0.26 AML other m 2021-09-30T12:02:16.06
IV.LNSS.HHE. ML:1.0 0.0000726 0.24 AML other m 2021-09-30T12:02:16.36
IV.GAVE.EHN. ML:0.9 0.000058450000000000005 0.22 AML other m 2021-09-30T12:02:16.81
IV.GAVE.EHE. ML:1.0 0.00007495 1.38 AML other m 2021-09-30T12:02:17.81
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