Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 06-12-2020 and time 11:50:49 (UTC) in region 2 km N Ussita (MC)

A magnitude ML 1.8 earthquake occured in region: 2 km N Ussita (MC), on

  • 06-12-2020 11:50:49 (UTC)
  • 06-12-2020 12:50:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9630, 13.1370 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 5 1107 1551
Castelsantangelo sul Nera MC 8 281 1832
Bolognola MC 8 142 1974
Acquacanina MC 8 121 2095
Fiastra MC 8 559 2654
Fiordimonte MC 9 202 2856
Monte Cavallo MC 12 145 3001
Pieve Torina MC 12 1458 4459
Pievebovigliana MC 12 866 5325
Preci PG 12 724 6049
Muccia MC 15 915 6964
Sarnano MC 16 3264 10228
Montefortino FM 17 1178 11406
Montemonaco AP 17 604 12010
Amandola FM 18 3629 15639
Sellano PG 19 1079 16718
Cessapalombo MC 19 512 17230
Norcia PG 19 4957 22187
Serravalle di Chienti MC 19 1070 23257

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
60 Km NE of Terni (111501 inhabitants)
63 Km E of Perugia (166134 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
79 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
Bulletin
Rev1000 		ML 1.8 2020-12-06
11:50:49		 42.9628 13.1372 10 2021-02-26
14:56:18		 Bollettino Sismico Italiano INGV 86891861
Reviewed
Rev100 		ML 2.0 2020-12-06
11:50:49		 42.9657 13.1258 12 2020-12-06
12:00:12		 Sala Sismica INGV-Roma 85242681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-06 11:50:49 ± 0.05
Latitude 42.9628 ± 0.0027
Longitude 13.1372 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86891861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 252
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
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 45
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.60165
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 86891861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-06 20:45:33

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 85242681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-06 12:00:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GIGS.HHN. 2020-12-06T11:51:09.95 0.3 undecidable manual S 148 66.7776 50 -0.08 67
IV.MURB.HHZ. 2020-12-06T11:51:09.00 0.6 undecidable manual S 304 59.6958 50 0.85 36
IV.ATSC.EHE. 2020-12-06T11:51:09.84 0.3 undecidable manual S 325 62.7927 50 0.87 53
IV.SSFR.HHN. 2020-12-06T11:51:08.46 0.6 undecidable manual S 331 59.7957 50 0.28 43
IV.TERO.HHZ. 2020-12-06T11:51:06.76 0.3 undecidable manual S 135 53.502 50 0.26 66
IV.ATCC.EHZ. 2020-12-06T11:51:05.13 0.3 undecidable manual S 302 47.2194 50 0.32 66
IV.LNSS.HHZ. 2020-12-06T11:51:03.08 0.3 undecidable manual S 191 40.7259 50 0.01 71
IV.EL6.EHE. 2020-12-06T11:51:03.18 0.3 undecidable manual S 356 40.7259 50 0.1 70
IV.SMA1.EHZ. 2020-12-06T11:51:02.55 0.3 undecidable manual S 156 40.2264 50 -0.4 66
IV.GIGS.HHN. 2020-12-06T11:51:01.12 0.3 undecidable manual P 148 66.7776 50 -0.26 64
IV.MTRA.EHE. 2020-12-06T11:51:00.14 0.3 undecidable manual S 137 31.1466 50 -0.37 67
IV.MURB.HHZ. 2020-12-06T11:51:00.28 0.3 undecidable manual P 304 59.6958 50 -0.02 69
IV.ATSC.EHE. 2020-12-06T11:51:00.68 0.3 undecidable manual P 325 62.7927 50 -0.09 67
IV.SSFR.HHN. 2020-12-06T11:51:00.01 0.3 undecidable manual P 331 59.7957 50 -0.31 65
IV.TERO.HHZ. 2020-12-06T11:50:59.10 0.3 undecidable manual P 135 53.502 50 -0.25 66
IV.MNTT.EHZ. 2020-12-06T11:50:59.64 3.0 undecidable manual P 0
IV.MF5.EHZ. 2020-12-06T11:50:59.59 0.3 undecidable manual S 84 26.3514 50 0.36 68
IV.SAP2.EHZ. 2020-12-06T11:50:59.49 0.3 undecidable manual S 55 25.9518 50 0.37 68
IV.ATCC.EHZ. 2020-12-06T11:50:58.09 0.1 undecidable manual P 302 47.2194 50 -0.28 89
IV.GUMA.HHZ. 2020-12-06T11:50:57.43 0.3 undecidable manual S 55 19.4694 118 0.19 71
IV.MML1.HNZ. 2020-12-06T11:50:57.42 0.1 undecidable manual S 321 21.4674 116 -0.41 90
IV.SMA1.EHZ. 2020-12-06T11:50:57.05 0.1 undecidable manual P 156 40.2264 50 -0.25 90
IV.LNSS.HHZ. 2020-12-06T11:50:57.17 0.1 undecidable manual P 191 40.7259 50 -0.2 91
IV.CESI.HHZ. 2020-12-06T11:50:57.14 0.3 undecidable manual S 284 19.4694 118 -0.08 73
IV.EL6.EHE. 2020-12-06T11:50:57.33 0.3 undecidable manual P 356 40.7259 50 -0.05 71
IV.PF6.EHZ. 2020-12-06T11:50:56.73 0.6 undecidable manual S 13 19.9689 117 -0.64 42
IV.MF5.EHZ. 2020-12-06T11:50:55.30 0.1 undecidable manual P 84 26.3514 50 0.15 95
IV.CSP1.EHZ. 2020-12-06T11:50:55.75 0.3 undecidable manual S 21 15.2736 124 -0.24 71
IV.SAP2.EHZ. 2020-12-06T11:50:55.39 0.3 undecidable manual P 55 25.9518 50 0.3 69
IV.NRCA.HNZ. 2020-12-06T11:50:55.67 0.3 undecidable manual S 187 14.4744 125 -0.07 74
IV.MTRA.EHE. 2020-12-06T11:50:55.57 0.3 undecidable manual P 137 31.1466 50 -0.32 68
IT.MTCL.HGZ. 2020-12-06T11:50:55.10 0.3 undecidable manual S 287 11.6772 131 0.11 73
IV.FDMO.HHZ. 2020-12-06T11:50:54.25 0.3 undecidable manual S 334 9.0798 139 -0.1 74
IV.FEMA.HNZ. 2020-12-06T11:50:54.29 0.3 undecidable manual S 269 7.0929 145 0.37 70
IV.MC2.EHZ. 2020-12-06T11:50:54.51 0.1 undecidable manual S 144 7.0929 145 0.59 88
IV.MML1.HNZ. 2020-12-06T11:50:54.06 0.1 undecidable manual P 321 21.4674 116 -0.28 93
IV.PF6.EHZ. 2020-12-06T11:50:53.67 0.1 undecidable manual P 13 19.9689 117 -0.41 91
IV.CESI.HHZ. 2020-12-06T11:50:53.90 0.1 undecidable manual P 284 19.4694 118 -0.09 97
IV.GUMA.HHZ. 2020-12-06T11:50:53.98 0.1 undecidable manual P 55 19.4694 118 -0.02 98
IV.CSP1.EHZ. 2020-12-06T11:50:53.15 0.1 negative manual P 21 15.2736 124 -0.13 97
IV.NRCA.HNZ. 2020-12-06T11:50:53.21 0.1 undecidable manual P 187 14.4744 125 0.07 98
IV.MC2.EHZ. 2020-12-06T11:50:52.48 0.1 undecidable manual P 144 7.0929 145 0.39 93
IT.MTCL.HGZ. 2020-12-06T11:50:52.74 0.1 undecidable manual P 287 11.6772 131 0.04 99
IV.FDMO.HHZ. 2020-12-06T11:50:52.36 0.1 positive manual P 334 9.0798 139 0.02 100
IV.FEMA.HNZ. 2020-12-06T11:50:52.38 0.1 undecidable manual P 269 7.0929 145 0.29 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNE. ML:2.1 0.00206 0.32 AML other m 2020-12-06T11:50:54.68
IV.FDMO.HHN. ML:2.2 0.002275 0.14 AML other m 2020-12-06T11:50:54.62
IV.FEMA.HNN. ML:1.9 0.0011587445000000001 0.2176 AML other m 2020-12-06T11:50:55.38
IV.FDMO.HHE. ML:1.8 0.00081927075 0.2432 AML other m 2020-12-06T11:50:54.88
IV.CSP1.EHN. ML:2.1 0.0012736689999999998 0.2368 AML other m 2020-12-06T11:50:56.04
IV.CSP1.EHE. ML:2.0 0.0009216753500000001 0.224 AML other m 2020-12-06T11:50:56.72
IV.CESI.HHE. ML:1.7 0.00038574725 0.1984 AML other m 2020-12-06T11:50:57.36
IV.GUMA.HHN. ML:2.3 0.0014199999999999998 0.26 AML other m 2020-12-06T11:50:57.77
IV.CESI.HHN. ML:1.8 0.0004474948 0.1216 AML other m 2020-12-06T11:50:58.59
IV.GUMA.HHE. ML:2.2 0.0011040999999999998 0.2432 AML other m 2020-12-06T11:50:57.63
IV.SMA1.EHE. ML:1.5 0.00010414255 0.1216 AML other m 2020-12-06T11:51:03.28
IV.LNSS.HHE. ML:1.7 0.0001803893 0.1216 AML other m 2020-12-06T11:51:04.36
IV.LNSS.HHN. ML:1.8 0.0002031265 0.16 AML other m 2020-12-06T11:51:04.35
IV.SMA1.EHN. ML:1.4 0.000083896805 0.2816 AML other m 2020-12-06T11:51:05.05
IV.TERO.HHN. ML:1.5 0.0000814725665 0.0576 AML other m 2020-12-06T11:51:07.58
IV.TERO.HHE. ML:1.6 0.0000903911 0.096 AML other m 2020-12-06T11:51:07.62
IV.MURB.HHE. ML:1.9 0.00014863099999999998 0.32 AML other m 2020-12-06T11:51:16.96
IV.MURB.HHN. ML:1.8 0.00012809030999999998 0.2944 AML other m 2020-12-06T11:51:13.41
IV.CESI.HNE. ML:1.7 0.00038293310000000005 0.1856 AML other m 2020-12-06T11:50:57.36
IV.CESI.HNN. ML:1.8 0.00043138995 0.128 AML other m 2020-12-06T11:50:58.59
IV.GUMA.HNN. ML:2.3 0.0014142169999999997 0.672 AML other m 2020-12-06T11:51:00.32
IV.GUMA.HNE. ML:2.3 0.0014170639999999998 0.2624 AML other m 2020-12-06T11:50:57.64
IV.LNSS.HNN. ML:1.8 0.00020487634999999998 0.1472 AML other m 2020-12-06T11:51:04.35
IV.LNSS.HNE. ML:1.7 0.00016645870000000002 0.1152 AML other m 2020-12-06T11:51:04.32
IV.ATCC.EHE. ML:1.5 0.000090266865 0.16 AML other m 2020-12-06T11:51:05.19
IV.ATCC.EHN. ML:1.4 0.000076503715 0.1984 AML other m 2020-12-06T11:51:07.50
IV.MURB.HNN. ML:1.8 0.000135015685 0.2752 AML other m 2020-12-06T11:51:13.41
IV.MURB.HNE. ML:1.9 0.00014806875 0.3776 AML other m 2020-12-06T11:51:16.49
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
Waveforms Seismic signals in miniseed + resp format Download