Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 02-03-2021 and time 23:47:26 (UTC) in region 2 km W Ussita (MC)

A magnitude ML 1.3 earthquake occured in region: 2 km W Ussita (MC), on

  • 02-03-2021 23:47:26 (UTC)
  • 03-03-2021 00:47:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9460, 13.1110 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
Ussita MC 2 444 444
Visso MC 2 1107 1551
Castelsantangelo sul Nera MC 7 281 1832
Preci PG 9 724 2556
Monte Cavallo MC 10 145 2701
Fiordimonte MC 10 202 2903
Fiastra MC 11 559 3462
Acquacanina MC 11 121 3583
Bolognola MC 11 142 3725
Pieve Torina MC 12 1458 5183
Pievebovigliana MC 13 866 6049
Muccia MC 16 915 6964
Sellano PG 16 1079 8043
Norcia PG 17 4957 13000
Montemonaco AP 18 604 13604
Sarnano MC 19 3264 16868
Montefortino FM 19 1178 18046
Serravalle di Chienti MC 19 1070 19116

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
57 Km NE of Terni (111501 inhabitants)
58 Km NW of Teramo (54892 inhabitants)
61 Km E of Perugia (166134 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
98 Km NW of Montesilvano (53738 inhabitants)
100 Km S of Fano (60888 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 1.3 2021-03-02
23:47:26		 42.946 13.1112 11 2021-03-03
00:04:47		 Sala Sismica INGV-Roma 87640511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-02 23:47:26 ± 0.05
Latitude 42.9460 ± 0.0027
Longitude 13.1112 ± 0.0049
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 87640511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 383
Semi-minor axis of confidence ellipse (meter) 308
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 254
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.56567
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 87640511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-03 00:04:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-03-02T23:47:46.31 0.3 undecidable manual S 347 62.7927 50 0.58 60
IV.TERO.HHZ. 2021-03-02T23:47:43.14 0.6 undecidable manual S 132 53.8017 50 -0.2 45
IV.RM33.EHZ. 2021-03-02T23:47:42.37 0.3 undecidable manual S 170 49.2174 50 0.25 67
IV.EL6.EHZ. 2021-03-02T23:47:40.37 0.3 undecidable manual S 359 42.5241 50 0.03 71
IV.MNTT.EHZ. 2021-03-02T23:47:40.23 0.6 undecidable manual S 72 41.3253 50 0.21 46
IV.GAVE.EHZ. 2021-03-02T23:47:37.71 0.3 undecidable manual S 212 33.2445 50 -0.14 70
IV.ARVD.HHZ. 2021-03-02T23:47:37.70 0.1 undecidable manual P 347 62.7927 50 0.12 89
IV.TERO.HHZ. 2021-03-02T23:47:36.10 0.1 undecidable manual P 132 53.8017 50 -0.1 91
IV.RM33.EHZ. 2021-03-02T23:47:35.31 0.1 undecidable manual P 170 49.2174 50 -0.18 90
IV.GUMA.HHZ. 2021-03-02T23:47:35.00 0.3 undecidable manual S 54 22.2555 50 0.06 73
IV.EL6.EHZ. 2021-03-02T23:47:34.02 0.1 undecidable manual P 359 42.5241 50 -0.44 87
IV.MNTT.EHZ. 2021-03-02T23:47:34.79 0.1 undecidable manual P 72 41.3253 50 0.51 85
IV.CSP1.EHZ. 2021-03-02T23:47:33.32 0.3 undecidable manual S 25 17.871 121 -0.34 69
IV.MMO1.EHZ. 2021-03-02T23:47:33.47 0.3 undecidable manual S 106 18.2706 120 -0.31 70
IV.CESI.HHZ. 2021-03-02T23:47:33.60 0.3 undecidable manual S 291 17.9709 121 -0.1 73
IV.GAVE.EHZ. 2021-03-02T23:47:32.81 0.1 undecidable manual P 212 33.2445 50 -0.22 92
IV.NRCA.HHZ. 2021-03-02T23:47:32.07 0.3 undecidable manual S 179 12.4764 131 -0.07 74
IV.FDMO.HHE. 2021-03-02T23:47:31.40 0.3 undecidable manual S 349 10.1787 136 -0.17 73
IV.GUMA.HHZ. 2021-03-02T23:47:31.26 0.1 undecidable manual P 54 22.2555 50 -0.09 97
IV.MC2.EHZ. 2021-03-02T23:47:31.36 0.3 undecidable manual S 121 7.3815 145 0.41 69
IT.MTCL.HGZ. 2021-03-02T23:47:31.52 0.3 undecidable manual S 300 10.4784 135 -0.12 73
IV.CSP1.EHZ. 2021-03-02T23:47:30.40 0.1 undecidable manual P 25 17.871 121 -0.21 95
IV.MMO1.EHZ. 2021-03-02T23:47:30.48 0.1 undecidable manual P 106 18.2706 120 -0.2 95
IV.FEMA.HNZ. 2021-03-02T23:47:30.94 0.3 undecidable manual S 290 5.2947 154 0.36 70
IV.CESI.HHZ. 2021-03-02T23:47:30.52 0.1 undecidable manual P 291 17.9709 121 -0.11 97
IV.NRCA.HHZ. 2021-03-02T23:47:29.77 0.1 undecidable manual P 179 12.4764 131 0.04 99
IV.FEMA.HNZ. 2021-03-02T23:47:29.18 0.1 undecidable manual P 290 5.2947 154 0.35 94
IV.FDMO.HHE. 2021-03-02T23:47:29.38 0.1 undecidable manual P 349 10.1787 136 -0.02 100
IV.MC2.EHZ. 2021-03-02T23:47:29.32 0.1 undecidable manual P 121 7.3815 145 0.28 95
IT.MTCL.HGZ. 2021-03-02T23:47:29.46 0.1 undecidable manual P 300 10.4784 135 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.00035350000000000003 0.5 AML other m 2021-03-02T23:47:32.27
IV.NRCA.HHE. ML:1.5 0.00033850000000000004 0.56 AML other m 2021-03-02T23:47:33.29
IV.CSP1.EHN. ML:1.6 0.000288 0.68 AML other m 2021-03-02T23:47:33.60
IV.CSP1.EHE. ML:1.5 0.0002325 0.44 AML other m 2021-03-02T23:47:33.58
IV.CESI.HHE. ML:1.0 0.0000812 0.12 AML other m 2021-03-02T23:47:33.81
IV.CESI.HHN. ML:1.0 0.00008560000000000001 1.24 AML other m 2021-03-02T23:47:34.32
IV.GUMA.HHE. ML:1.5 0.00022399999999999997 0.16 AML other m 2021-03-02T23:47:35.32
IV.GUMA.HHN. ML:1.3 0.0001395 0.52 AML other m 2021-03-02T23:47:36.29
IV.GAVE.EHE. ML:1.3 0.0000823 0.42 AML other m 2021-03-02T23:47:38.24
IV.GAVE.EHN. ML:1.1 0.00005095 1.08 AML other m 2021-03-02T23:47:38.24
IV.TERO.HHN. ML:0.8 0.0000167 1.9 AML other m 2021-03-02T23:47:43.95
IV.TERO.HHE. ML:0.8 0.0000156 0.86 AML other m 2021-03-02T23:47:44.76
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