Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 19-10-2021 and time 10:45:26 (Italy) in region 2 km SW Ussita (MC)

A magnitude ML 0.6 earthquake occured in region: 2 km SW Ussita (MC), on

  • 19-10-2021 08:45:26 (UTC)
  • 19-10-2021 10:45:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9350, 13.1240 at 10 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 2 444 444
Visso MC 3 1107 1551
Castelsantangelo sul Nera MC 5 281 1832
Preci PG 9 724 2556
Bolognola MC 11 142 2698
Acquacanina MC 11 121 2819
Fiastra MC 12 559 3378
Fiordimonte MC 12 202 3580
Monte Cavallo MC 12 145 3725
Pieve Torina MC 14 1458 5183
Pievebovigliana MC 15 866 6049
Norcia PG 16 4957 11006
Sellano PG 17 1079 12085
Montemonaco AP 17 604 12689
Muccia MC 18 915 13604
Montefortino FM 18 1178 14782
Sarnano MC 18 3264 18046
Amandola FM 20 3629 21675
Montegallo AP 20 523 22198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
63 Km E of Perugia (166134 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 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 0.6 2021-10-19
08:45:26		 42.9352 13.124 10 2022-03-30
13:04:14		 Bollettino Sismico Italiano INGV 97252341
Reviewed
Rev100 		ML 0.8 2021-10-19
08:45:26		 42.9318 13.1187 9 2021-10-19
08:51:27		 Sala Sismica INGV-Roma 96756221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-19 08:45:26 ± 0.07
Latitude 42.9352 ± 0.0027
Longitude 13.1240 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97252341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 361
Semi-minor axis of confidence ellipse (meter) 312
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 58
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 15
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) 0.44247
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 97252341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-04 09:59:11

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96756221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 08:51:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTCC.HHZ. 2021-10-19T08:47:04.55 3.0 undecidable manual Sg 10.51 0
SI.ROSI.HHZ. 2021-10-19T08:47:04.36 3.0 undecidable manual Sn -8.7 0
GU.GRAM.HHZ. 2021-10-19T08:46:57.46 3.0 undecidable manual Sg 16.76 0
IV.CAPR.HNZ. 2021-10-19T08:46:56.06 3.0 undecidable manual Sn -3.81 0
IV.EPIT.HHZ. 2021-10-19T08:46:55.51 3.0 positive manual Pg 16.35 0
IV.EVRN.HHZ. 2021-10-19T08:46:52.33 3.0 positive manual Pg 11.34 0
IV.FREG.EHZ. 2021-10-19T08:46:45.61 3.0 undecidable manual Sn -1.39 0
IV.CMPR.HHZ. 2021-10-19T08:46:43.86 3.0 undecidable manual Sn 1.27 0
IV.ZCCA.HHZ. 2021-10-19T08:46:35.58 3.0 undecidable manual Sg 10.08 0
IV.CAVE.HHZ. 2021-10-19T08:46:33.74 3.0 undecidable manual Sn 0.25 0
IV.USI.HHZ. 2021-10-19T08:46:30.50 3.0 positive manual Pg 5.49 0
IV.MDI.HHZ. 2021-10-19T08:46:29.10 3.0 undecidable manual Pg 9.12 0
IV.AGLI.HHZ. 2021-10-19T08:46:27.39 3.0 negative manual Pg 10.18 0
OT.OT05.EHZ. 2021-10-19T08:46:27.06 3.0 undecidable manual Sg 7.13 0
IV.CSFT.HHZ. 2021-10-19T08:46:23.34 3.0 undecidable manual Sn 0.03 0
GU.GBOS.HHZ. 2021-10-19T08:46:23.36 3.0 undecidable manual Pn -2.06 0
SI.ROSI.HHZ. 2021-10-19T08:46:22.35 3.0 positive manual Pn -2.26 0
IV.MNTV.EHZ. 2021-10-19T08:46:17.29 3.0 positive manual Pg 10.64 0
IV.CMPR.HHZ. 2021-10-19T08:46:06.60 3.0 undecidable manual Pn -0.89 0
IV.FIR.HHZ. 2021-10-19T08:45:53.48 3.0 undecidable manual Pg 2.09 0
IV.TST02.HHZ. 2021-10-19T08:45:42.16 3.0 undecidable manual Pn -0.89 0
IV.ATMI.HHZ. 2021-10-19T08:45:40.17 3.0 negative manual Pg 0.48 0
IV.GAVE.EHZ. 2021-10-19T08:45:37.76 0.6 undecidable manual S 215 32.8449 50 0.14 48
IV.ARRO.EHZ. 2021-10-19T08:45:34.97 0.3 undecidable manual P 217 49.1175 50 -0.34 66
IV.MMO1.EHZ. 2021-10-19T08:45:33.09 0.3 undecidable manual S 103 16.9719 121 0.01 75
IV.CSP1.EHZ. 2021-10-19T08:45:33.52 0.3 undecidable manual S 21 18.5703 119 -0.05 75
IV.CESI.HHZ. 2021-10-19T08:45:33.68 0.3 undecidable manual S 294 19.4694 118 -0.15 73
IV.GAVE.EHZ. 2021-10-19T08:45:32.88 0.3 undecidable manual P 215 32.8449 50 0.08 72
IV.NRCA.HHZ. 2021-10-19T08:45:31.32 0.3 undecidable manual S 184 11.2776 132 -0.18 74
IV.FDMO.HHZ. 2021-10-19T08:45:31.45 0.3 undecidable manual S 345 11.6772 131 -0.14 74
IV.CESI.HHZ. 2021-10-19T08:45:30.83 0.3 undecidable manual P 294 19.4694 118 0.22 72
IV.MC2.EHZ. 2021-10-19T08:45:30.32 0.3 undecidable manual S 116 5.8941 150 0.01 77
IV.CSP1.EHZ. 2021-10-19T08:45:30.59 0.3 undecidable manual P 21 18.5703 119 0.13 73
IV.NRCA.HHZ. 2021-10-19T08:45:29.46 0.1 undecidable manual P 184 11.2776 132 0.19 98
IV.FDMO.HHZ. 2021-10-19T08:45:29.40 0.1 undecidable manual P 345 11.6772 131 0.08 100
IV.MMO1.EHZ. 2021-10-19T08:45:29.89 0.3 undecidable manual P 103 16.9719 121 -0.29 71
IV.MC2.EHZ. 2021-10-19T08:45:28.79 0.3 undecidable manual P 116 5.8941 150 0.21 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.6 0.0000498 0.32 AML other m 2021-10-19T08:45:31.65
IV.FDMO.HHE. ML:0.5 0.00003945 0.18 AML other m 2021-10-19T08:45:31.67
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