Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 27-11-2021 and time 08:46:42 (Italy) in region 1 km N Visso (MC)

A magnitude ML 1.6 earthquake occured in region: 1 km N Visso (MC), on

  • 27-11-2021 07:46:42 (UTC)
  • 27-11-2021 08:46:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9390, 13.0890 at 13 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
Visso MC 1 1107 1107
Ussita MC 4 444 1551
Castelsantangelo sul Nera MC 7 281 1832
Preci PG 8 724 2556
Monte Cavallo MC 9 145 2701
Fiordimonte MC 11 202 2903
Fiastra MC 12 559 3462
Pieve Torina MC 12 1458 4920
Acquacanina MC 12 121 5041
Bolognola MC 13 142 5183
Pievebovigliana MC 14 866 6049
Sellano PG 14 1079 7128
Norcia PG 16 4957 12085
Muccia MC 16 915 13000
Serravalle di Chienti MC 19 1070 14070
Cerreto di Spoleto PG 19 1075 15145
Montemonaco AP 20 604 15749

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Foligno (57155 inhabitants)
55 Km NE of Terni (111501 inhabitants)
59 Km NW of Teramo (54892 inhabitants)
60 Km E of Perugia (166134 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
99 Km W of Montesilvano (53738 inhabitants)
99 Km NE of Viterbo (67173 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 1.6 2021-11-27
07:46:42		 42.9388 13.0888 13 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99908361
Reviewed
Rev100 		ML 1.6 2021-11-27
07:46:42		 42.9387 13.0978 9 2021-11-27
07:57:23		 Sala Sismica INGV-Roma 97864311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-27 07:46:42 ± 0.11
Latitude 42.9388 ± 0.0054
Longitude 13.0888 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99908361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 614
Semi-minor axis of confidence ellipse (meter) 131
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35703
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 97864311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-27 07:57:23

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 99908361
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-18 15:03:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BLLA.EHZ. 2021-11-27T07:46:59.68 3.0 undecidable manual S -7.74 0
IV.SNTG.HHE. 2021-11-27T07:46:54.56 0.3 undecidable manual S 341 37.0296 94 0.15 71
IV.ASSB.HHN. 2021-11-27T07:46:54.48 0.3 undecidable manual S 288 36.741 94 0.15 70
IV.MF5.EHZ. 2021-11-27T07:46:53.35 0.1 undecidable manual S 80 30.5472 95 0.66 83
IV.MMO1.EHZ. 2021-11-27T07:46:49.38 0.6 undecidable manual S 103 19.869 102 -0.46 45
IV.CESI.HHZ. 2021-11-27T07:46:49.15 0.1 undecidable manual S 296 16.6722 108 0.12 96
IV.SNTG.HHE. 2021-11-27T07:46:49.06 0.3 undecidable manual P 341 37.0296 94 -0.13 70
IV.ASSB.HHN. 2021-11-27T07:46:49.06 0.3 undecidable manual P 288 36.741 94 -0.08 71
IV.SMA1.EHN. 2021-11-27T07:46:49.33 0.3 undecidable manual P 150 39.627 93 -0.25 68
IV.CSP1.EHZ. 2021-11-27T07:46:49.61 0.6 undecidable manual S 29 19.3695 103 -0.12 48
IV.MF5.EHZ. 2021-11-27T07:46:48.59 0.1 undecidable manual P 80 30.5472 95 0.4 90
IV.FDMO.HHZ. 2021-11-27T07:46:47.44 0.1 undecidable manual S 359 10.878 126 -0.2 96
IV.NRCA.HNZ. 2021-11-27T07:46:47.52 0.6 undecidable manual S 170 11.877 122 -0.34 48
IV.MC2.EHZ. 2021-11-27T07:46:47.12 0.6 undecidable manual S 110 8.6802 135 -0.08 50
IT.MTCL.HGZ. 2021-11-27T07:46:47.25 0.1 undecidable manual S 310 9.4794 132 -0.11 99
IV.CESI.HHZ. 2021-11-27T07:46:46.19 0.1 positive manual P 296 16.6722 108 0.11 97
IV.FEMA.HNE. 2021-11-27T07:46:46.60 0.1 undecidable manual S 309 4.0959 157 0.08 98
IV.CSP1.EHZ. 2021-11-27T07:46:46.06 0.3 undecidable manual P 29 19.3695 103 -0.43 67
IV.MMO1.EHZ. 2021-11-27T07:46:46.35 0.1 positive manual P 103 19.869 102 -0.2 95
IV.MC2.EHZ. 2021-11-27T07:46:45.07 0.1 negative manual P 110 8.6802 135 0.05 99
IT.MTCL.HGZ. 2021-11-27T07:46:45.17 0.1 undecidable manual P 310 9.4794 132 0.05 99
IV.FDMO.HHZ. 2021-11-27T07:46:45.27 0.1 negative manual P 359 10.878 126 -0.01 100
IV.NRCA.HNZ. 2021-11-27T07:46:45.31 0.1 positive manual P 170 11.877 122 -0.1 99
IV.FEMA.HNE. 2021-11-27T07:46:44.79 0.1 undecidable manual P 309 4.0959 157 0.16 98
IV.BADI.EHZ. 2021-11-27T07:46:41.93 3.0 undecidable manual P -9.99 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:1.6 0.0004095 0.16 AML other m 2021-11-27T07:46:47.61
IV.NRCA.HHE. ML:1.8 0.0006775 0.96 AML other m 2021-11-27T07:46:47.21
IV.NRCA.HNE. ML:1.8 0.0006619999999999999 0.96 AML other m 2021-11-27T07:46:47.22
IV.FDMO.HHN. ML:1.4 0.00027400000000000005 0.38 AML other m 2021-11-27T07:46:47.96
IV.NRCA.HHN. ML:1.8 0.000608 0.62 AML other m 2021-11-27T07:46:49.42
IV.NRCA.HNN. ML:1.8 0.000624 0.62 AML other m 2021-11-27T07:46:49.11
IV.CESI.HHE. ML:1.4 0.00017749999999999998 0.22 AML other m 2021-11-27T07:46:49.26
IV.CESI.HHN. ML:1.3 0.000169 0.26 AML other m 2021-11-27T07:46:49.40
IV.MMO1.EHN. ML:1.5 0.00022649999999999998 1.02 AML other m 2021-11-27T07:46:49.97
IV.MMO1.EHE. ML:1.4 0.00017099999999999998 1.08 AML other m 2021-11-27T07:46:49.28
IV.CSP1.EHN. ML:1.6 0.000253 0.72 AML other m 2021-11-27T07:46:49.82
IV.CSP1.EHE. ML:1.5 0.000219 0.42 AML other m 2021-11-27T07:46:51.58
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