Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 10-10-2021 and time 02:22:18 (UTC) in region 2 km N Ussita (MC)

A magnitude ML 1.0 earthquake occured in region: 2 km N Ussita (MC), on

  • 10-10-2021 02:22:18 (UTC)
  • 10-10-2021 04:22:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9670, 13.1420 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 3 444 444
Visso MC 6 1107 1551
Bolognola MC 8 142 1693
Acquacanina MC 8 121 1814
Fiastra MC 8 559 2373
Castelsantangelo sul Nera MC 8 281 2654
Fiordimonte MC 9 202 2856
Pieve Torina MC 11 1458 4314
Pievebovigliana MC 12 866 5180
Monte Cavallo MC 12 145 5325
Preci PG 13 724 6049
Muccia MC 15 915 6964
Sarnano MC 15 3264 10228
Montefortino FM 17 1178 11406
Montemonaco AP 17 604 12010
Amandola FM 18 3629 15639
Cessapalombo MC 19 512 16151
Serravalle di Chienti MC 19 1070 17221
Gualdo MC 20 815 18036
Sellano PG 20 1079 19115
Norcia PG 20 4957 24072
Camerino MC 20 6974 31046

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
61 Km NE of Terni (111501 inhabitants)
63 Km E of Perugia (166134 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
97 Km NW of Montesilvano (53738 inhabitants)
98 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
Bulletin
Rev1000 		ML 1.0 2021-10-10
02:22:18		 42.9672 13.1423 9 2022-03-30
13:04:10		 Bollettino Sismico Italiano INGV 96414571
Reviewed
Rev100 		ML 1.0 2021-10-10
02:22:18		 42.9678 13.1398 9 2021-10-10
15:12:43		 Sala Sismica INGV-Roma 96410121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-10 02:22:18 ± 0.05
Latitude 42.9672 ± 0.0027
Longitude 13.1423 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96414571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 231
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 60
Circular confidence region, given by single value of horizontal uncertainty (meter) 230.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.06565
Epicentral distance of station farthest from the epicenter (degree) 0.41009
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96414571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-10 20:10:40

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96410121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-10 15:12:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CING.HHZ. 2021-10-10T02:22:33.80 0.6 undecidable manual S 5 45.5211 50 0.4 44
IV.SNTG.HNZ. 2021-10-10T02:22:30.78 0.3 undecidable manual S 333 35.8419 50 -0.05 72
IV.MTRA.HNZ. 2021-10-10T02:22:29.42 0.3 undecidable manual S 138 31.1466 106 -0.12 71
IV.MF5.EHE. 2021-10-10T02:22:28.30 0.6 undecidable manual S 85 25.8519 109 0.52 44
IV.MML1.EHZ. 2021-10-10T02:22:26.44 0.3 undecidable manual S 320 21.3675 112 0.14 72
IV.CING.HHZ. 2021-10-10T02:22:26.93 0.1 undecidable manual P 5 45.5211 50 -0.09 93
IV.CESI.HHZ. 2021-10-10T02:22:26.09 0.3 undecidable manual S 282 19.7691 114 0.29 70
IV.SNTG.HNZ. 2021-10-10T02:22:25.21 0.1 undecidable manual P 333 35.8419 50 -0.32 90
IV.PF6.EHN. 2021-10-10T02:22:25.61 0.3 undecidable manual S 13 19.3695 114 -0.08 73
IV.MTRA.HNZ. 2021-10-10T02:22:24.59 0.1 undecidable manual P 138 31.1466 106 -0.2 93
IV.CSP1.EHZ. 2021-10-10T02:22:24.33 0.3 undecidable manual S 20 14.7741 121 0.07 74
IV.MMO1.EHZ. 2021-10-10T02:22:24.83 0.3 undecidable manual S 117 16.7721 118 -0.05 74
IV.MF5.EHE. 2021-10-10T02:22:24.21 0.3 undecidable manual P 85 25.8519 109 0.44 67
IV.NRCA.HHZ. 2021-10-10T02:22:24.54 0.3 undecidable manual S 189 14.9739 120 0.2 72
IT.MTCL.HGZ. 2021-10-10T02:22:23.47 0.3 undecidable manual S 284 11.9769 126 0.01 75
IV.MMO1.EHZ. 2021-10-10T02:22:22.18 0.1 undecidable manual P 117 16.7721 118 0.09 98
IV.MC2.EHZ. 2021-10-10T02:22:22.07 0.3 undecidable manual S 148 7.2927 141 -0.19 73
IV.CESI.HHZ. 2021-10-10T02:22:22.72 0.1 undecidable manual P 282 19.7691 114 0.09 97
IV.FEMA.HNN. 2021-10-10T02:22:22.19 0.3 undecidable manual S 266 7.4814 140 -0.13 74
IV.MML1.EHZ. 2021-10-10T02:22:22.94 0.1 undecidable manual P 320 21.3675 112 0.02 99
IV.FDMO.HHZ. 2021-10-10T02:22:22.43 0.3 undecidable manual S 330 8.88 135 -0.22 73
IV.PF6.EHN. 2021-10-10T02:22:22.28 0.1 undecidable manual P 13 19.3695 114 -0.29 94
IV.NRCA.HHZ. 2021-10-10T02:22:21.78 0.1 undecidable manual P 189 14.9739 120 0 100
IV.CSP1.EHZ. 2021-10-10T02:22:21.80 0.1 positive manual P 20 14.7741 121 0.06 99
IT.MTCL.HGZ. 2021-10-10T02:22:21.36 0.1 undecidable manual P 284 11.9769 126 0.08 99
IV.FDMO.HHZ. 2021-10-10T02:22:20.68 0.1 undecidable manual P 330 8.88 135 -0.13 99
IV.MC2.EHZ. 2021-10-10T02:22:20.48 0.1 undecidable manual P 148 7.2927 141 -0.11 99
IV.FEMA.HNN. 2021-10-10T02:22:20.74 0.1 undecidable manual P 266 7.4814 140 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.2 0.000238 0.3 AML other m 2021-10-10T02:22:22.77
IV.FDMO.HHE. ML:1.0 0.00016499999999999997 1.58 AML other m 2021-10-10T02:22:23.00
IV.NRCA.HHN. ML:1.0 0.0001026 0.2 AML other m 2021-10-10T02:22:24.90
IV.NRCA.HHE. ML:1.0 0.00010005 0.12 AML other m 2021-10-10T02:22:25.22
IV.CSP1.EHN. ML:1.4 0.0002479074 0.7808 AML other m 2021-10-10T02:22:26.68
IV.CESI.HHE. ML:0.9 0.00006727675499999999 1.1392 AML other m 2021-10-10T02:22:26.88
IV.CESI.HHN. ML:0.9 0.000060371864999999995 0.2592 AML other m 2021-10-10T02:22:26.33
IV.MML1.EHE. ML:0.6 0.00002703961 1.6592 AML other m 2021-10-10T02:22:27.88
IV.CSP1.EHE. ML:1.1 0.00013779844 0.92 AML other m 2021-10-10T02:22:28.03
IV.MML1.EHN. ML:1.0 0.000065736855 0.96 AML other m 2021-10-10T02:22:34.23
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