Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 06-01-2021 and time 08:13:50 (UTC) in region 2 km NE Ussita (MC)

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

  • 06-01-2021 08:13:50 (UTC)
  • 06-01-2021 09:13:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9560, 13.1640 at 16 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 7 1107 1551
Castelsantangelo sul Nera MC 7 281 1832
Bolognola MC 7 142 1974
Acquacanina MC 8 121 2095
Fiastra MC 9 559 2654
Fiordimonte MC 11 202 2856
Preci PG 13 724 3580
Pieve Torina MC 14 1458 5038
Pievebovigliana MC 14 866 5904
Monte Cavallo MC 14 145 6049
Sarnano MC 14 3264 9313
Montefortino FM 15 1178 10491
Montemonaco AP 15 604 11095
Amandola FM 16 3629 14724
Muccia MC 17 915 15639
Montegallo AP 19 523 16162
Cessapalombo MC 19 512 16674
Norcia PG 19 4957 21631
Gualdo MC 19 815 22446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
55 Km NW of Teramo (54892 inhabitants)
61 Km NE of Terni (111501 inhabitants)
65 Km E of Perugia (166134 inhabitants)
70 Km N of L'Aquila (69753 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
94 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 1.8 2021-01-06
08:13:50		 42.9557 13.1638 16 2021-07-12
16:54:58		 Bollettino Sismico Italiano INGV 87079951
Reviewed
Rev100 		ML 1.8 2021-01-06
08:13:50		 42.9577 13.1662 16 2021-01-06
08:22:14		 Sala Sismica INGV-Roma 86045751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-06 08:13:50 ± 0.1
Latitude 42.9557 ± 0.0045
Longitude 13.1638 ± 0.0049
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87079951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 460
Semi-minor axis of confidence ellipse (meter) 61
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 206
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 24
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) 0.46045
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 87079951
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-12 13:36:46

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 86045751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-06 08:22:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2021-01-06T08:14:05.18 3.0 negative manual P -0.12 0
IV.T1299.HNN. 2021-01-06T08:14:03.13 0.3 undecidable manual S 165 36.9297 102 0.25 68
IV.MF5.EHZ. 2021-01-06T08:14:00.01 0.1 undecidable manual S 81 24.2535 112 0.36 91
IV.MOMA.HHZ. 2021-01-06T08:14:00.21 0.3 undecidable manual P 251 51.1155 98 0.44 64
IV.SAP2.EHZ. 2021-01-06T08:14:00.02 0.1 undecidable manual S 51 24.6531 112 0.27 93
IV.ASSB.HHZ. 2021-01-06T08:13:58.40 0.1 undecidable manual P 283 42.1245 100 0 94
IV.PF6.EHZ. 2021-01-06T08:13:58.41 0.3 undecidable manual S 7 20.3685 118 -0.29 69
IV.CSP1.EHZ. 2021-01-06T08:13:57.47 0.1 undecidable manual S 12 15.4734 128 -0.13 97
IV.T1299.HNN. 2021-01-06T08:13:57.18 0.3 undecidable manual P 165 36.9297 102 -0.44 65
IV.MNTP.HNZ. 2021-01-06T08:13:57.06 0.3 undecidable manual P 51 31.9458 105 0.2 70
IT.MTCL.HGZ. 2021-01-06T08:13:57.48 0.6 undecidable manual S 288 13.9749 131 0.18 48
IV.NRCA.HNZ. 2021-01-06T08:13:57.21 0.1 undecidable manual S 197 14.1747 131 -0.12 98
IV.MC2.EHZ. 2021-01-06T08:13:56.14 0.1 undecidable manual S 157 5.2947 159 0.19 96
IV.SAP2.EHZ. 2021-01-06T08:13:56.12 0.3 undecidable manual P 51 24.6531 112 0.32 69
IV.FDMO.HHZ. 2021-01-06T08:13:56.69 0.1 undecidable manual S 325 10.878 140 -0.03 100
IV.MMO1.EHZ. 2021-01-06T08:13:56.97 0.1 undecidable manual S 115 14.6742 130 -0.46 91
IV.MF5.EHZ. 2021-01-06T08:13:55.76 0.1 undecidable manual P 81 24.2535 112 0.01 98
IV.NRCA.HNZ. 2021-01-06T08:13:54.31 0.1 undecidable manual P 197 14.1747 131 -0.09 98
IV.CSP1.EHZ. 2021-01-06T08:13:54.47 0.1 undecidable manual P 12 15.4734 128 -0.09 97
IV.FDMO.HHZ. 2021-01-06T08:13:54.01 0.1 undecidable manual P 325 10.878 140 -0.05 99
IV.PF6.EHZ. 2021-01-06T08:13:54.93 0.3 undecidable manual P 7 20.3685 118 -0.27 70
IT.MTCL.HGZ. 2021-01-06T08:13:54.42 0.3 undecidable manual P 288 13.9749 131 0.03 74
IV.MMO1.EHZ. 2021-01-06T08:13:54.18 0.1 undecidable manual P 115 14.6742 130 -0.28 94
IV.MC2.EHZ. 2021-01-06T08:13:53.67 0.1 undecidable manual P 157 5.2947 159 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.8 0.000639 0.14 AML other m 2021-01-06T08:13:57.06
IV.NRCA.HNN. ML:2.0 0.000736 0.14 AML other m 2021-01-06T08:13:57.34
IV.FDMO.HHE. ML:1.5 0.00030199999999999997 0.84 AML other m 2021-01-06T08:13:57.80
IV.NRCA.HHN. ML:2.0 0.0007465 0.82 AML other m 2021-01-06T08:13:57.33
IV.NRCA.HHE. ML:1.9 0.000579 0.1 AML other m 2021-01-06T08:13:57.89
IV.NRCA.HNE. ML:1.9 0.0005945 0.12 AML other m 2021-01-06T08:13:57.89
IV.SAP2.EHN. ML:2.4 0.0012475000000000001 0.52 AML other m 2021-01-06T08:14:00.44
IV.SAP2.EHE. ML:1.7 0.00027800000000000004 0.86 AML other m 2021-01-06T08:14:01.03
IV.ASSB.HHE. ML:1.3 0.00006625 1.52 AML other m 2021-01-06T08:14:05.09
IV.ASSB.HHN. ML:1.4 0.00007645 1.4 AML other m 2021-01-06T08:14:05.89
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