Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 01-07-2021 and time 16:46:42 (Italy) in region 2 km NW Ussita (MC)

A magnitude ML 0.9 earthquake occured in region: 2 km NW Ussita (MC), on

  • 01-07-2021 14:46:42 (UTC)
  • 01-07-2021 16:46:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9580, 13.1210 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.

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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 4 1107 1551
Castelsantangelo sul Nera MC 7 281 1832
Acquacanina MC 9 121 1953
Fiastra MC 9 559 2512
Fiordimonte MC 9 202 2714
Bolognola MC 10 142 2856
Monte Cavallo MC 11 145 3001
Preci PG 11 724 3725
Pieve Torina MC 11 1458 5183
Pievebovigliana MC 12 866 6049
Muccia MC 15 915 6964
Sarnano MC 17 3264 10228
Sellano PG 17 1079 11307
Montemonaco AP 18 604 11911
Montefortino FM 18 1178 13089
Norcia PG 18 4957 18046
Serravalle di Chienti MC 19 1070 19116
Amandola FM 19 3629 22745

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
58 Km NW of Teramo (54892 inhabitants)
59 Km NE of Terni (111501 inhabitants)
62 Km E of Perugia (166134 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
80 Km SW of Ancona (100861 inhabitants)
97 Km NW of Montesilvano (53738 inhabitants)
99 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 0.9 2021-07-01
14:46:42		 42.9577 13.121 11 2021-07-01
15:02:24		 Sala Sismica INGV-Roma 92103061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-01 14:46:42 ± 0.1
Latitude 42.9577 ± 0.0027
Longitude 13.1210 ± 0.0037
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92103061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 298
Semi-minor axis of confidence ellipse (meter) 66
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 43
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.18976
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 92103061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-01 15:02:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MML1.EHZ. 2021-07-01T14:46:50.57 0.6 undecidable manual S 325 21.0678 116 -0.19 48
IV.MMO1.EHZ. 2021-07-01T14:46:49.66 0.6 undecidable manual S 111 17.9709 120 -0.13 49
IV.CSP1.EHZ. 2021-07-01T14:46:49.37 0.6 undecidable manual S 25 16.3725 123 0.05 49
IV.CESI.HHZ. 2021-07-01T14:46:49.89 0.6 undecidable manual S 287 18.3705 120 -0.02 50
IV.NRCA.HHZ. 2021-07-01T14:46:48.38 0.6 undecidable manual S 182 13.7751 127 -0.22 48
IV.FDMO.HHZ. 2021-07-01T14:46:47.23 0.6 undecidable manual S 343 9.1797 139 -0.18 49
IT.MTCL.HGE. 2021-07-01T14:46:47.68 0.6 undecidable manual S 292 10.6782 135 -0.09 50
IV.MML1.EHZ. 2021-07-01T14:46:47.21 0.1 undecidable manual P 325 21.0678 116 -0.09 97
IV.CSP1.EHZ. 2021-07-01T14:46:46.56 0.1 negative manual P 25 16.3725 123 0.08 98
IV.CESI.HHZ. 2021-07-01T14:46:46.79 0.1 positive manual P 287 18.3705 120 -0.02 99
IV.MMO1.EHZ. 2021-07-01T14:46:46.79 0.6 undecidable manual P 111 17.9709 120 0.04 49
IV.NRCA.HHZ. 2021-07-01T14:46:46.06 0.3 negative manual P 182 13.7751 127 0 75
IV.FEMA.HNE. 2021-07-01T14:46:46.94 0.6 undecidable manual S 275 5.7942 151 0.2 49
IT.MTCL.HGE. 2021-07-01T14:46:45.62 0.1 undecidable manual P 292 10.6782 135 0.04 100
IV.FEMA.HNE. 2021-07-01T14:46:45.20 0.1 undecidable manual P 275 5.7942 151 0.21 97
IV.FDMO.HHZ. 2021-07-01T14:46:45.51 1.0 undecidable manual P 343 9.1797 139 0.14 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.0 0.00011549999999999999 0.46 AML other m 2021-07-01T14:46:47.72
IV.FDMO.HHN. ML:1.1 0.000148 0.22 AML other m 2021-07-01T14:46:47.68
IV.NRCA.HHN. ML:1.0 0.00010195 0.1 AML other m 2021-07-01T14:46:48.47
IV.NRCA.HHE. ML:1.0 0.00009520000000000001 0.08 AML other m 2021-07-01T14:46:49.37
IV.CESI.HHE. ML:0.7 0.0000392 0.48 AML other m 2021-07-01T14:46:51.48
IV.CESI.HHN. ML:0.6 0.00003495 0.56 AML other m 2021-07-01T14:46:51.79
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