Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 03-03-2021 and time 01:36:38 (UTC) in region 5 km E Norcia (PG)

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

  • 03-03-2021 01:36:38 (UTC)
  • 03-03-2021 02:36:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8040, 13.1550 at 12 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 10 281 5238
Arquata del Tronto AP 12 1178 6416
Preci PG 13 724 7140
Accumoli RI 14 667 7807
Cascia PG 15 3217 11024
Montegallo AP 15 523 11547
Visso MC 15 1107 12654
Ussita MC 16 444 13098
Montemonaco AP 18 604 13702
Cerreto di Spoleto PG 20 1075 14777

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
49 Km NE of Terni (111501 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
71 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
95 Km W of Pescara (121014 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
97 Km NW of Chieti (51815 inhabitants)
98 Km NE 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 		ML 0.7 2021-03-03
01:36:38		 42.8035 13.155 12 2021-03-03
01:42:49		 Sala Sismica INGV-Roma 87642951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-03 01:36:38 ± 0.09
Latitude 42.8035 ± 0.0036
Longitude 13.1550 ± 0.0110
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87642951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 661
Semi-minor axis of confidence ellipse (meter) 604
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.04227
Epicentral distance of station farthest from the epicenter (degree) 0.37592
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 87642951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-03 01:42:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-03-03T01:36:51.83 0.3 undecidable manual S 119 41.7249 91 -0.06 71
IV.RM33.EHZ. 2021-03-03T01:36:49.89 0.6 undecidable manual S 172 33.0447 91 0.32 47
IV.CESI.HHZ. 2021-03-03T01:36:48.73 0.6 undecidable manual S 318 30.2475 92 -0.09 49
IV.FDMO.HHZ. 2021-03-03T01:36:47.48 0.6 undecidable manual S 348 26.4513 92 -0.33 47
IV.T1299.HNN. 2021-03-03T01:36:46.79 0.3 undecidable manual S 151 21.4674 93 0.31 72
IV.SMA1.EHZ. 2021-03-03T01:36:46.93 0.6 undecidable manual S 142 24.1536 93 -0.28 47
IV.LNSS.HHZ. 2021-03-03T01:36:46.61 0.6 undecidable manual S 203 24.1536 93 -0.59 43
IV.TERO.HHZ. 2021-03-03T01:36:46.07 0.6 negative manual P 119 41.7249 91 -0.08 47
IV.MMO1.EHZ. 2021-03-03T01:36:45.11 0.6 undecidable manual S 53 17.5713 96 -0.34 47
IV.CESI.HHZ. 2021-03-03T01:36:44.33 0.6 positive manual P 318 30.2475 92 -0.04 49
IV.RM33.EHZ. 2021-03-03T01:36:44.85 1.0 undecidable manual P 172 33.0447 91 0.05 25
IV.MC2.EHE. 2021-03-03T01:36:43.98 0.6 undecidable manual S 13 12.2766 113 -0.1 50
IV.FDMO.HHZ. 2021-03-03T01:36:43.59 0.6 undecidable manual P 348 26.4513 92 -0.2 48
IV.LNSS.HHZ. 2021-03-03T01:36:43.51 0.3 undecidable manual P 203 24.1536 93 0.07 74
IV.T1299.HNN. 2021-03-03T01:36:43.04 0.1 undecidable manual P 151 21.4674 93 0.02 100
IV.SMA1.EHZ. 2021-03-03T01:36:43.43 0.6 positive manual P 142 24.1536 93 -0.01 49
IV.NRCA.HHZ. 2021-03-03T01:36:42.34 0.6 undecidable manual S 315 4.6953 151 -0.25 49
IV.MC2.EHE. 2021-03-03T01:36:42.16 0.1 undecidable manual P 13 12.2766 113 0.52 90
IV.MMO1.EHZ. 2021-03-03T01:36:42.32 0.6 positive manual P 53 17.5713 96 -0.1 50
IV.NRCA.HHZ. 2021-03-03T01:36:40.96 0.1 positive manual P 315 4.6953 151 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.0 0.000132 1.04 AML other m 2021-03-03T01:36:42.75
IV.NRCA.HHN. ML:1.0 0.00013350000000000002 0.12 AML other m 2021-03-03T01:36:43.92
IV.SMA1.EHE. ML:0.6 0.0000227 0.52 AML other m 2021-03-03T01:36:48.49
IV.SMA1.EHN. ML:0.4 0.000015100000000000001 0.48 AML other m 2021-03-03T01:36:58.33
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