Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 02-03-2021 and time 21:15:36 (Italy) in region 5 km NW Norcia (PG)

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

  • 02-03-2021 20:15:36 (UTC)
  • 02-03-2021 21:15:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8300, 13.0620 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 5 4957 4957
Preci PG 6 724 5681
Castelsantangelo sul Nera MC 10 281 5962
Visso MC 12 1107 7069
Cerreto di Spoleto PG 12 1075 8144
Sellano PG 13 1079 9223
Cascia PG 13 3217 12440
Ussita MC 14 444 12884
Poggiodomo PG 17 117 13001
Vallo di Nera PG 18 364 13365
Monte Cavallo MC 19 145 13510

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
60 Km NW of L'Aquila (69753 inhabitants)
63 Km E of Perugia (166134 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
96 Km N of Guidonia Montecelio (88673 inhabitants)
99 Km N 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 2021-03-02
20:15:36		 42.8305 13.0623 11 2021-03-02
20:24:15		 Sala Sismica INGV-Roma 87632281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-02 20:15:36 ± 0.06
Latitude 42.8305 ± 0.0036
Longitude 13.0623 ± 0.0061
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 87632281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 523
Semi-minor axis of confidence ellipse (meter) 286
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 116
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 17
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) 0.28329
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 87632281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-02 20:24:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CADC.EHZ. 2021-03-02T20:17:18.52 3.0 undecidable manual Sg 6.6 0
IV.IST3.HHZ. 2021-03-02T20:17:15.70 3.0 undecidable manual Sn -9.99 0
IV.HPAC.HHZ. 2021-03-02T20:17:13.81 3.0 negative manual Pg 7.47 0
AC.VLO.HHZ. 2021-03-02T20:17:06.53 3.0 positive manual Pg 8.94 0
IV.HAGA.HHZ. 2021-03-02T20:17:00.02 3.0 undecidable manual Pg 0.84 0
MN.CLTB.HHZ. 2021-03-02T20:16:51.96 3.0 negative manual Pg 0.93 0
MN.TRI.HHZ. 2021-03-02T20:16:28.44 3.0 positive manual Pg 2.33 0
IV.CRTC.HHZ. 2021-03-02T20:16:15.46 3.0 undecidable manual Sn -1.53 0
IV.BARO.EHZ. 2021-03-02T20:15:50.15 3.0 undecidable manual S -8.7 0
IV.CSP1.EHZ. 2021-03-02T20:15:47.69 0.6 undecidable manual S 22 31.2465 50 -0.05 49
IV.LNSS.HHZ. 2021-03-02T20:15:46.15 0.6 undecidable manual S 184 25.3524 50 -0.01 50
IV.CESI.HHZ. 2021-03-02T20:15:45.66 0.6 undecidable manual S 327 23.1546 50 0.06 50
IV.MMO1.EHZ. 2021-03-02T20:15:45.18 0.6 undecidable manual S 70 22.8549 50 -0.32 47
IV.FDMO.HHZ. 2021-03-02T20:15:45.66 0.6 undecidable manual S 5 22.9548 50 0.13 49
IV.GAVE.HNZ. 2021-03-02T20:15:44.50 0.6 undecidable manual S 222 20.5683 117 -0.34 47
IV.SMA1.EHE. 2021-03-02T20:15:43.44 0.1 undecidable manual P 135 31.4463 50 0.28 94
IV.CSP1.EHZ. 2021-03-02T20:15:43.12 1.0 undecidable manual P 22 31.2465 50 -0.01 25
IV.MC2.EHZ. 2021-03-02T20:15:42.98 0.6 undecidable manual S 49 13.6752 128 0.16 50
IV.LNSS.HHZ. 2021-03-02T20:15:42.07 0.1 undecidable manual P 184 25.3524 50 -0.15 97
IV.MMO1.EHZ. 2021-03-02T20:15:41.86 0.6 negative manual P 70 22.8549 50 0.03 50
IV.FDMO.HHZ. 2021-03-02T20:15:41.98 0.6 negative manual P 5 22.9548 50 0.12 49
IV.CESI.HHZ. 2021-03-02T20:15:41.76 0.6 undecidable manual P 327 23.1546 50 -0.13 49
IV.GAVE.HNZ. 2021-03-02T20:15:41.64 0.1 undecidable manual P 222 20.5683 117 0.18 97
IV.NRCA.HHZ. 2021-03-02T20:15:40.69 0.6 undecidable manual S 85 4.2957 158 -0.09 51
IV.MC2.EHZ. 2021-03-02T20:15:40.01 0.1 undecidable manual P 49 13.6752 128 -0.28 97
IV.NRCA.HHZ. 2021-03-02T20:15:39.30 0.1 undecidable manual P 85 4.2957 158 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0.7 0.0000892 0.4 AML other m 2021-03-02T20:15:41.73
IV.NRCA.HHN. ML:0.5 0.00005450000000000001 1.56 AML other m 2021-03-02T20:15:42.15
IV.CSP1.EHN. ML:0.9 0.00003805 0.62 AML other m 2021-03-02T20:15:52.50
IV.CSP1.EHE. ML:1.0 0.00004514999999999999 0.42 AML other m 2021-03-02T20:15:53.16
IV.NRCA.HNE. ML:0.8 0.00011478089999999999 0.0768 AML other m 2021-03-02T20:15:40.81
IV.NRCA.HNN. ML:1.0 0.00014789765 0.0768 AML other m 2021-03-02T20:15:40.79
IV.CESI.HHE. ML:0.2 0.000011145608499999999 0.1024 AML other m 2021-03-02T20:15:45.95
IV.CESI.HHN. ML:0.5 0.00001910951 0.128 AML other m 2021-03-02T20:15:45.88
IV.FDMO.HHE. ML:0.2 0.0000118847405 0.1152 AML other m 2021-03-02T20:15:46.01
IV.FDMO.HHN. ML:0.2 0.0000110538035 0.2944 AML other m 2021-03-02T20:15:46.63
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