Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 27-12-2020 and time 17:19:09 (Italy) in region 2 km W Ussita (MC)

A magnitude ML 1.6 earthquake occured in region: 2 km W Ussita (MC), on

  • 27-12-2020 16:19:09 (UTC)
  • 27-12-2020 17:19:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9520, 13.1160 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 7 281 1832
Fiordimonte MC 10 202 2034
Acquacanina MC 10 121 2155
Fiastra MC 10 559 2714
Preci PG 10 724 3438
Bolognola MC 10 142 3580
Monte Cavallo MC 10 145 3725
Pieve Torina MC 12 1458 5183
Pievebovigliana MC 13 866 6049
Muccia MC 16 915 6964
Sellano PG 17 1079 8043
Sarnano MC 18 3264 11307
Norcia PG 18 4957 16264
Montemonaco AP 18 604 16868
Montefortino FM 18 1178 18046
Serravalle di Chienti MC 19 1070 19116
Amandola FM 20 3629 22745

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
58 Km NE of Terni (111501 inhabitants)
58 Km NW of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
97 Km NW of Montesilvano (53738 inhabitants)
100 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 1.6 2020-12-27
16:19:09		 42.9522 13.1163 10 2021-02-26
14:56:13		 Bollettino Sismico Italiano INGV 86040311
Reviewed
Rev100 		ML 1.8 2020-12-27
16:19:09		 42.9463 13.1137 10 2020-12-27
16:31:54		 Sala Sismica INGV-Roma 85758671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-27 16:19:09 ± 0.05
Latitude 42.9522 ± 0.0027
Longitude 13.1163 ± 0.0037
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 86040311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 329
Semi-minor axis of confidence ellipse (meter) 262
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 47
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.04946
Epicentral distance of station farthest from the epicenter (degree) 0.54139
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 85758671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-27 16:31:54

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 41
Type of magnitude ML
Reference to an origin 86040311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-06 01:10:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSFR.HHZ. 2020-12-27T16:19:28.40 0.6 undecidable manual S 333 60.0954 50 0.42 43
IV.TERO.HHZ. 2020-12-27T16:19:26.20 0.6 undecidable manual S 132 53.9016 50 -0.13 46
IV.FOSV.HNE. 2020-12-27T16:19:24.99 0.3 undecidable manual S 323 47.7189 50 0.33 67
IV.MNTT.EHZ. 2020-12-27T16:19:24.24 0.3 undecidable manual S 72 40.7259 50 1.43 42
IV.CING.HNZ. 2020-12-27T16:19:24.60 0.3 undecidable manual S 8 47.4192 50 0.02 71
IV.EL6.EHZ. 2020-12-27T16:19:23.00 0.6 undecidable manual S 358 41.8248 50 -0.1 47
IV.ASSB.HHZ. 2020-12-27T16:19:22.00 0.3 undecidable manual S 285 38.4282 50 -0.2 70
IV.SMA1.EHZ. 2020-12-27T16:19:22.60 0.6 undecidable manual S 153 39.9267 50 0.03 48
IV.LNSS.HHZ. 2020-12-27T16:19:22.30 0.3 undecidable manual S 189 39.2274 50 -0.1 71
IV.T1299.HNN. 2020-12-27T16:19:22.39 0.3 undecidable manual S 159 37.7289 50 0.38 67
IV.GAVE.EHZ. 2020-12-27T16:19:21.00 0.3 undecidable manual S 212 34.0437 50 -0.01 73
IV.SAP2.EHZ. 2020-12-27T16:19:19.40 0.6 undecidable manual S 55 27.9498 50 0 49
IV.MF5.EHZ. 2020-12-27T16:19:19.90 0.3 undecidable manual S 82 28.1496 50 0.45 67
IV.MTRA.EHZ. 2020-12-27T16:19:19.90 0.3 undecidable manual S 133 31.4463 50 -0.43 67
IV.SSFR.HHZ. 2020-12-27T16:19:19.96 0.3 undecidable manual P 333 60.0954 50 -0.12 68
IV.TERO.HHZ. 2020-12-27T16:19:18.85 0.3 undecidable manual P 132 53.9016 50 -0.28 67
IV.FOSV.HNE. 2020-12-27T16:19:18.08 0.3 undecidable manual P 323 47.7189 50 -0.08 70
IV.MNTT.EHZ. 2020-12-27T16:19:17.61 0.3 undecidable manual P 72 40.7259 50 0.51 65
IV.CING.HNZ. 2020-12-27T16:19:17.88 0.3 undecidable manual P 8 47.4192 50 -0.24 68
IV.GUMA.HHZ. 2020-12-27T16:19:17.60 0.3 undecidable manual S 55 21.5673 115 0.02 75
IV.LNSS.HHZ. 2020-12-27T16:19:16.52 0.3 undecidable manual P 189 39.2274 50 -0.34 68
IV.CESI.HHZ. 2020-12-27T16:19:16.60 0.3 undecidable manual S 289 18.1707 119 0.07 74
IV.T1299.HNN. 2020-12-27T16:19:16.62 0.3 undecidable manual P 159 37.7289 50 -0.01 73
IV.EL6.EHZ. 2020-12-27T16:19:16.94 0.3 undecidable manual P 358 41.8248 50 -0.33 68
IV.PF6.EHN. 2020-12-27T16:19:16.98 0.3 undecidable manual S 17 21.5673 115 -0.6 65
IV.ASSB.HHZ. 2020-12-27T16:19:16.53 0.3 undecidable manual P 285 38.4282 50 -0.21 70
IV.MMO1.EHZ. 2020-12-27T16:19:16.10 0.3 undecidable manual S 109 18.0708 120 -0.4 69
IV.MNTP.HNZ. 2020-12-27T16:19:16.53 0.3 undecidable manual P 54 35.2425 50 0.29 69
IV.SMA1.EHZ. 2020-12-27T16:19:16.69 0.3 undecidable manual P 153 39.9267 50 -0.27 69
IV.MF5.EHZ. 2020-12-27T16:19:15.24 0.3 undecidable manual P 82 28.1496 50 0.08 73
IV.CSP1.EHZ. 2020-12-27T16:19:15.80 0.3 undecidable manual S 25 17.0718 121 -0.41 69
IV.MTRA.EHZ. 2020-12-27T16:19:15.37 0.3 undecidable manual P 133 31.4463 50 -0.29 69
IV.NRCA.HNZ. 2020-12-27T16:19:15.00 0.3 undecidable manual S 181 13.1757 128 -0.08 75
IV.SAP2.EHZ. 2020-12-27T16:19:15.20 0.3 undecidable manual P 55 27.9498 50 0.07 73
IV.GAVE.EHZ. 2020-12-27T16:19:15.92 0.1 undecidable manual P 212 34.0437 50 -0.14 95
IV.MC2.EHZ. 2020-12-27T16:19:14.00 0.3 undecidable manual S 127 7.3815 144 0.31 72
IV.GUMA.HHZ. 2020-12-27T16:19:14.08 0.1 undecidable manual P 55 21.5673 115 0 100
IT.MTCL.HGZ. 2020-12-27T16:19:14.40 0.3 undecidable manual S 296 10.5783 134 0 76
IV.MMO1.EHZ. 2020-12-27T16:19:13.34 0.1 undecidable manual P 109 18.0708 120 -0.12 98
IV.CSP1.EHZ. 2020-12-27T16:19:13.19 0.1 undecidable manual P 25 17.0718 121 -0.09 99
IV.FEMA.HNZ. 2020-12-27T16:19:13.80 0.3 undecidable manual S 282 5.4945 152 0.46 70
IV.CESI.HHZ. 2020-12-27T16:19:13.56 0.1 undecidable manual P 289 18.1707 119 0.09 99
IV.PF6.EHN. 2020-12-27T16:19:13.74 0.3 undecidable manual P 17 21.5673 115 -0.34 70
IV.FEMA.HNZ. 2020-12-27T16:19:12.00 0.3 undecidable manual P 282 5.4945 152 0.37 71
IT.MTCL.HGZ. 2020-12-27T16:19:12.40 0.1 undecidable manual P 296 10.5783 134 0.16 99
IV.MC2.EHZ. 2020-12-27T16:19:12.06 0.1 undecidable manual P 127 7.3815 144 0.23 98
IV.NRCA.HNZ. 2020-12-27T16:19:12.77 0.1 undecidable manual P 181 13.1757 128 0.13 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FEMA.HNE. ML:1.8 0.001049 1.78 AML other m 2020-12-27T16:19:13.95
IV.FEMA.HNN. ML:1.9 0.0012749999999999999 0.1 AML other m 2020-12-27T16:19:14.23
IV.NRCA.HHE. ML:2.2 0.0017649999999999999 0.1 AML other m 2020-12-27T16:19:15.84
IV.NRCA.HNE. ML:2.2 0.0016400000000000002 0.08 AML other m 2020-12-27T16:19:15.85
IV.NRCA.HHN. ML:2.0 0.00107286085 0.1664 AML other m 2020-12-27T16:19:15.24
IV.NRCA.HNN. ML:2.0 0.0009562587999999999 0.0896 AML other m 2020-12-27T16:19:15.25
IV.CESI.HHE. ML:1.4 0.00021916839999999997 0.064 AML other m 2020-12-27T16:19:17.04
IV.CESI.HHN. ML:1.5 0.00024073720000000002 0.1408 AML other m 2020-12-27T16:19:16.84
IV.GUMA.HHN. ML:2.0 0.00078332425 0.128 AML other m 2020-12-27T16:19:17.95
IV.GUMA.HHE. ML:2.0 0.00072228195 0.1536 AML other m 2020-12-27T16:19:17.90
IV.MF5.EHE. ML:1.9 0.000388 0.22 AML other m 2020-12-27T16:19:20.51
IV.GAVE.EHE. ML:1.9 0.0003115 0.2 AML other m 2020-12-27T16:19:21.97
IV.GAVE.EHN. ML:1.7 0.00022556095 0.1152 AML other m 2020-12-27T16:19:22.22
IV.LNSS.HHE. ML:1.5 0.00012093204499999998 0.1152 AML other m 2020-12-27T16:19:23.85
IV.ASSB.HHE. ML:1.3 0.00006990971500000001 0.1024 AML other m 2020-12-27T16:19:22.92
IV.ASSB.HHN. ML:1.4 0.0000829866465 0.1792 AML other m 2020-12-27T16:19:23.68
IV.EL6.EHE. ML:1.5 0.00010611411000000002 0.256 AML other m 2020-12-27T16:19:24.51
IV.LNSS.HHN. ML:1.5 0.00010488003000000001 0.1792 AML other m 2020-12-27T16:19:23.33
IV.EL6.EHN. ML:1.5 0.000096514195 0.1024 AML other m 2020-12-27T16:19:24.05
IV.MF5.EHN. ML:1.6 0.00022145179999999998 0.3072 AML other m 2020-12-27T16:19:20.67
IV.CESI.HNE. ML:1.5 0.00024518 0.1664 AML other m 2020-12-27T16:19:17.04
IV.CESI.HNN. ML:1.4 0.000222452925 0.1664 AML other m 2020-12-27T16:19:17.59
IV.GUMA.HNE. ML:2.0 0.0006332822 0.2048 AML other m 2020-12-27T16:19:17.92
IV.GUMA.HNN. ML:1.9 0.0005739481900000001 0.1024 AML other m 2020-12-27T16:19:17.88
IV.SAP2.EHN. ML:2.4 0.0011844000000000002 0.128 AML other m 2020-12-27T16:19:20.06
IV.SAP2.EHE. ML:1.6 0.00019879560000000002 0.1792 AML other m 2020-12-27T16:19:23.07
IV.MTRA.HNN. ML:1.5 0.00014946691 0.2688 AML other m 2020-12-27T16:19:21.11
IV.MTRA.HNE. ML:1.4 0.00010381570500000001 0.3328 AML other m 2020-12-27T16:19:23.13
IV.MTRA.EHN. ML:1.3 0.00010075002499999999 0.192 AML other m 2020-12-27T16:19:21.11
IV.MTRA.EHE. ML:1.4 0.000118674595 0.2048 AML other m 2020-12-27T16:19:20.70
IV.GAVE.HNE. ML:1.9 0.00032746340000000003 0.192 AML other m 2020-12-27T16:19:21.96
IV.LNSS.HNE. ML:1.6 0.00013833752499999998 0.2048 AML other m 2020-12-27T16:19:22.90
IV.LNSS.HNN. ML:1.5 0.00011347331999999998 0.1664 AML other m 2020-12-27T16:19:23.16
IV.SMA1.EHE. ML:0.9 0.000029313095 0.1408 AML other m 2020-12-27T16:19:22.79
IV.SMA1.EHN. ML:0.9 0.00003102413 0.1152 AML other m 2020-12-27T16:19:23.23
IV.MNTT.EHE. ML:1.7 0.00017227695 0.2176 AML other m 2020-12-27T16:19:25.60
IV.MNTT.EHN. ML:1.6 0.0001516786 0.2048 AML other m 2020-12-27T16:19:25.51
IV.TERO.HHE. ML:1.2 0.00003285003 0.1536 AML other m 2020-12-27T16:19:27.85
IV.TERO.HHN. ML:1.0 0.00002706254 0.0896 AML other m 2020-12-27T16:19:27.86
IV.SSFR.HHE. ML:1.6 0.00007472439 0.2688 AML other m 2020-12-27T16:19:30.04
IV.SSFR.HHN. ML:1.6 0.00007828561500000001 0.2432 AML other m 2020-12-27T16:19:30.04
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