Earthquake with magnitude of ML 0.7 on date 21-09-2023 and time 02:21:47 (UTC) in region 5 km SW Norcia (PG)

A magnitude ML 0.7 earthquake occured in region: 5 km SW Norcia (PG), on

  • 21-09-2023 02:21:47 (UTC)
  • 21-09-2023 04:21:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7470, 13.0730 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.

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
Cascia PG 6 3217 8174
Poggiodomo PG 12 117 8291
Monteleone di Spoleto PG 15 599 8890
Preci PG 15 724 9614
Cerreto di Spoleto PG 15 1075 10689
Accumoli RI 15 667 11356
Cittareale RI 16 482 11838
Vallo di Nera PG 17 364 12202
Castelsantangelo sul Nera MC 18 281 12483
Arquata del Tronto AP 19 1178 13661
Sant'Anatolia di Narco PG 19 564 14225
Sellano PG 20 1079 15304

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
41 Km NE of Terni (111501 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
53 Km W of Teramo (54892 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
99 Km W of Pescara (121014 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 0.7 2023-09-21
02:21:47
42.7472 13.0733 10 2023-09-21
09:41:32
Sala Sismica INGV-Roma 121306941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-21 02:21:47 ± 0.06
Latitude 42.7472 ± 0.0027
Longitude 13.0733 ± 0.0073
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 121306941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 650
Semi-minor axis of confidence ellipse (meter) 75
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 275
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37322
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 121306941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-21 09:41:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CIMA.HNZ. 2023-09-21T02:22:12.74 3.0 undecidable manual Sg -0.04 0
IV.MML1.EHN. 2023-09-21T02:22:01.30 0.1 undecidable manual S 349 41.4252 50 0.28 90
IV.BARO.EHZ. 2023-09-21T02:22:00.88 3.0 undecidable manual S -0.21 0
IV.FDMO.HHZ. 2023-09-21T02:21:58.37 0.3 undecidable manual S 2 32.1456 50 -0.15 71
IV.CESI.HHZ. 2023-09-21T02:21:58.28 3.0 undecidable manual S 0
IV.RM33.EHZ. 2023-09-21T02:21:57.51 0.3 undecidable manual S 156 28.8489 50 -0.13 72
IV.MMO1.EHZ. 2023-09-21T02:21:57.05 0.3 undecidable manual S 51 26.6511 50 -0.01 74
IV.TERO.HHZ. 2023-09-21T02:21:55.89 3.0 negative manual Pn 0.34 0
IV.MC2.EHN. 2023-09-21T02:21:55.35 0.1 undecidable manual S 27 20.4684 116 0.11 97
IV.MML1.EHN. 2023-09-21T02:21:54.89 0.3 undecidable manual P 349 41.4252 50 -0.33 67
IV.CESI.HHZ. 2023-09-21T02:21:54.57 3.0 undecidable manual P 0
IV.FDMO.HHZ. 2023-09-21T02:21:53.75 0.1 undecidable manual P 2 32.1456 50 -0.03 97
IV.RM33.EHZ. 2023-09-21T02:21:53.13 0.3 undecidable manual P 156 28.8489 50 -0.14 71
IV.LNSS.HHZ. 2023-09-21T02:21:53.95 0.1 undecidable manual S 190 16.2726 122 0.01 100
IV.MMO1.EHZ. 2023-09-21T02:21:52.97 0.3 undecidable manual P 51 26.6511 50 0.04 73
IV.SMA1.EHZ. 2023-09-21T02:21:52.91 0.3 undecidable manual P 121 24.9528 50 0.24 71
IV.NRCA.HHZ. 2023-09-21T02:21:52.04 0.1 undecidable manual S 19 10.1787 135 -0.24 96
IV.MC2.EHN. 2023-09-21T02:21:51.92 0.1 undecidable manual P 27 20.4684 116 0.04 99
IV.LNSS.HHZ. 2023-09-21T02:21:51.23 0.1 undecidable manual P 190 16.2726 122 0.1 98
IV.NRCA.HHZ. 2023-09-21T02:21:50.27 0.1 undecidable manual P 19 10.1787 135 0.1 99
IV.ATCC.EHZ. 2023-09-21T02:21:49.55 3.0 positive manual P 0.03 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.0 0.0001095 0.1 AML other m 2023-09-21T02:21:52.38
IV.NRCA.HHN. ML:0.8 0.0000839 0.06 AML other m 2023-09-21T02:21:52.65
IV.SMA1.EHE. ML:0.5 0.000021900000000000004 0.42 AML other m 2023-09-21T02:21:59.32
IV.SMA1.EHN. ML:0.5 0.000021850000000000003 1.48 AML other m 2023-09-21T02:22:03.87
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