Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 28-09-2021 and time 05:05:49 (Italy) in region 1 km SE Norcia (PG)

A magnitude ML 0.6 earthquake occured in region: 1 km SE Norcia (PG), on

  • 28-09-2021 03:05:49 (UTC)
  • 28-09-2021 05:05:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7870, 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 1 4957 4957
Cascia PG 11 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Accumoli RI 16 667 9846
Arquata del Tronto AP 16 1178 11024
Cerreto di Spoleto PG 16 1075 12099
Poggiodomo PG 16 117 12216
Visso MC 16 1107 13323
Ussita MC 18 444 13767
Sellano PG 18 1079 14846
Cittareale RI 19 482 15328
Monteleone di Spoleto PG 20 599 15927
Montegallo AP 20 523 16450
Vallo di Nera PG 20 364 16814

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)
68 Km SE of Perugia (166134 inhabitants)
91 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)
98 Km W of Pescara (121014 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
100 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
Reviewed
Rev100 		ML 0.6 2021-09-28
03:05:49		 42.7867 13.1053 11 2021-09-28
03:47:06		 Sala Sismica INGV-Roma 95972661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-28 03:05:49 ± 0.04
Latitude 42.7867 ± 0.0018
Longitude 13.1053 ± 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 95972661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 309
Semi-minor axis of confidence ellipse (meter) 170
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 81
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.31386
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 95972661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-28 03:47:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-09-28T03:06:01.71 0.3 undecidable manual S 13 34.8429 50 0.11 71
IV.RM33.HNZ. 2021-09-28T03:06:00.85 0.1 undecidable manual S 164 32.0457 50 -0.01 97
IV.CESI.HHZ. 2021-09-28T03:06:00.12 0.3 undecidable manual S 326 29.1486 50 0.02 73
IV.SMA1.EHZ. 2021-09-28T03:05:59.14 0.1 undecidable manual S 133 25.5522 50 0.02 98
IV.FDMO.HHZ. 2021-09-28T03:05:59.49 0.3 undecidable manual S 357 27.75 50 -0.22 70
IV.T1299.HNZ. 2021-09-28T03:05:58.43 0.3 undecidable manual S 139 22.2555 50 0.19 72
IV.MMO1.EHZ. 2021-09-28T03:05:57.99 0.3 undecidable manual S 55 21.9669 50 -0.17 72
IV.LNSS.HNE. 2021-09-28T03:05:57.87 0.1 undecidable manual S 195 21.0678 50 -0.06 98
IV.GAVE.EHZ. 2021-09-28T03:05:57.72 0.3 undecidable manual S 239 20.1687 50 0.04 74
IV.CSP1.EHZ. 2021-09-28T03:05:56.80 0.1 undecidable manual P 13 34.8429 50 0.18 93
IV.MC2.EHE. 2021-09-28T03:05:56.45 0.1 undecidable manual S 26 15.4734 125 0.07 99
IV.CESI.HHZ. 2021-09-28T03:05:55.75 0.1 undecidable manual P 326 29.1486 50 0 98
IV.SMA1.EHZ. 2021-09-28T03:05:55.23 0.1 undecidable manual P 133 25.5522 50 0.05 98
IV.RM33.HNZ. 2021-09-28T03:05:55.82 0.1 undecidable manual P 164 32.0457 50 -0.37 90
IV.FDMO.HHZ. 2021-09-28T03:05:55.52 0.1 undecidable manual P 357 27.75 50 -0.01 98
IV.MMO1.EHZ. 2021-09-28T03:05:54.51 0.1 undecidable manual P 55 21.9669 50 -0.12 97
IV.LNSS.HNE. 2021-09-28T03:05:54.51 0.1 undecidable manual P 195 21.0678 50 0.01 99
IV.GAVE.EHZ. 2021-09-28T03:05:54.44 0.1 undecidable manual P 239 20.1687 50 0.09 98
IV.T1299.HNZ. 2021-09-28T03:05:54.78 0.1 undecidable manual P 139 22.2555 50 0.1 97
IV.NRCA.HHZ. 2021-09-28T03:05:53.71 0.3 undecidable manual S 8 5.2947 154 -0.32 72
IV.MC2.EHE. 2021-09-28T03:05:53.77 0.1 undecidable manual P 26 15.4734 125 0.17 97
IV.NRCA.HHZ. 2021-09-28T03:05:52.35 0.1 undecidable manual P 8 5.2947 154 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.8 0.00009049999999999999 0.06 AML other m 2021-09-28T03:05:53.85
IV.NRCA.HHE. ML:1.2 0.0002165 0.08 AML other m 2021-09-28T03:05:53.89
IV.NRCA.HNE. ML:1.2 0.00021423603000000002 0.16 AML other m 2021-09-28T03:05:53.90
IV.GAVE.EHE. ML:0.5 0.000027087075000000002 0.1792 AML other m 2021-09-28T03:05:59.07
IV.GAVE.EHN. ML:0.5 0.000027117130000000004 0.2192 AML other m 2021-09-28T03:05:58.20
IV.FDMO.HHE. ML:0.3 0.0000118418975 0.08 AML other m 2021-09-28T03:05:59.87
IV.FDMO.HHN. ML:0.5 0.000016710550000000002 0.0992 AML other m 2021-09-28T03:06:00.11
IV.CESI.HHE. ML:0.0 0.0000068124136999999995 0.1792 AML other m 2021-09-28T03:06:00.45
IV.CESI.HHN. ML:0.5 0.00001649444 1.24 AML other m 2021-09-28T03:06:05.92
IV.CSP1.EHN. ML:0.9 0.000031984889 0.64 AML other m 2021-09-28T03:06:09.04
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