Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 06-01-2021 and time 09:31:07 (Italy) in region 2 km NE Ussita (MC)

A magnitude ML 1.4 earthquake occured in region: 2 km NE Ussita (MC), on

  • 06-01-2021 08:31:07 (UTC)
  • 06-01-2021 09:31:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9530, 13.1580 at 17 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 6 1107 1551
Castelsantangelo sul Nera MC 6 281 1832
Bolognola MC 7 142 1974
Acquacanina MC 9 121 2095
Fiastra MC 9 559 2654
Fiordimonte MC 11 202 2856
Preci PG 13 724 3580
Pieve Torina MC 13 1458 5038
Monte Cavallo MC 14 145 5183
Pievebovigliana MC 14 866 6049
Sarnano MC 15 3264 9313
Montefortino FM 15 1178 10491
Montemonaco AP 15 604 11095
Amandola FM 16 3629 14724
Muccia MC 17 915 15639
Norcia PG 19 4957 20596
Montegallo AP 19 523 21119
Cessapalombo MC 19 512 21631
Gualdo MC 20 815 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)
60 Km NE of Terni (111501 inhabitants)
65 Km E of Perugia (166134 inhabitants)
70 Km N of L'Aquila (69753 inhabitants)
80 Km SW of Ancona (100861 inhabitants)
95 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
Reviewed
Rev100 		ML 1.4 2021-01-06
08:31:07		 42.9533 13.1583 17 2021-01-06
08:37:26		 Sala Sismica INGV-Roma 86045831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-06 08:31:07 ± 0.17
Latitude 42.9533 ± 0.0045
Longitude 13.1583 ± 0.0074
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86045831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 519
Semi-minor axis of confidence ellipse (meter) 412
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 114
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 0.22303
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 86045831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-06 08:37:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-01-06T08:31:17.63 0.6 undecidable manual S 81 24.753 114 0.37 46
IV.GUMA.HHZ. 2021-01-06T08:31:16.03 0.3 undecidable manual S 50 18.7701 123 0.17 72
IV.CSP1.EHZ. 2021-01-06T08:31:15.07 0.3 undecidable manual S 14 15.7731 129 -0.15 73
IV.MMO1.EHZ. 2021-01-06T08:31:14.60 0.6 undecidable manual S 114 14.9739 131 -0.44 46
IV.NRCA.HHZ. 2021-01-06T08:31:14.80 0.3 undecidable manual S 195 13.7751 134 -0.01 75
IV.FDMO.HHZ. 2021-01-06T08:31:14.26 0.3 undecidable manual S 328 10.878 142 -0.03 75
IV.MF5.EHZ. 2021-01-06T08:31:13.34 0.1 undecidable manual P 81 24.753 114 0.07 97
IV.MC2.EHZ. 2021-01-06T08:31:13.67 0.3 undecidable manual S 152 5.2947 160 0.11 75
IV.CSP1.EHZ. 2021-01-06T08:31:12.02 0.1 undecidable manual P 14 15.7731 129 -0.07 99
IV.GUMA.HHZ. 2021-01-06T08:31:12.54 0.3 undecidable manual P 50 18.7701 123 0.08 73
IV.MC2.EHZ. 2021-01-06T08:31:11.25 0.3 undecidable manual P 152 5.2947 160 0.12 75
IV.FDMO.HHZ. 2021-01-06T08:31:11.60 0.1 positive manual P 328 10.878 142 0.05 100
IV.MMO1.EHZ. 2021-01-06T08:31:11.69 0.1 undecidable manual P 114 14.9739 131 -0.3 94
IV.NRCA.HHZ. 2021-01-06T08:31:11.90 0.1 positive manual P 195 13.7751 134 0.05 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:1.3 0.000162 0.16 AML other m 2021-01-06T08:31:14.62
IV.NRCA.HHN. ML:1.6 0.000264 0.14 AML other m 2021-01-06T08:31:14.90
IV.FDMO.HHE. ML:1.0 0.00008854999999999998 0.62 AML other m 2021-01-06T08:31:15.37
IV.CSP1.EHN. ML:1.4 0.000171 0.42 AML other m 2021-01-06T08:31:15.15
IV.NRCA.HHE. ML:1.4 0.0002105 0.1 AML other m 2021-01-06T08:31:15.46
IV.CSP1.EHE. ML:1.3 0.00014043739999999998 1.5232 AML other m 2021-01-06T08:31:17.06
IV.NRCA.HNE. ML:1.4 0.0002044264 0.1088 AML other m 2021-01-06T08:31:15.46
IV.NRCA.HNN. ML:1.6 0.00028112724999999997 0.1408 AML other m 2021-01-06T08:31:14.91
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