Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 19-02-2021 and time 04:49:29 (Italy) in region 4 km NW Visso (MC)

A magnitude ML 1.1 earthquake occured in region: 4 km NW Visso (MC), on

  • 19-02-2021 03:49:29 (UTC)
  • 19-02-2021 04:49:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9530, 13.0470 at 10 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.

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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 4 1107 1107
Monte Cavallo MC 6 145 1252
Ussita MC 8 444 1696
Preci PG 8 724 2420
Fiordimonte MC 10 202 2622
Pieve Torina MC 10 1458 4080
Castelsantangelo sul Nera MC 11 281 4361
Sellano PG 12 1079 5440
Pievebovigliana MC 13 866 6306
Fiastra MC 13 559 6865
Acquacanina MC 14 121 6986
Muccia MC 14 915 7901
Serravalle di Chienti MC 15 1070 8971
Bolognola MC 15 142 9113
Norcia PG 18 4957 14070
Cerreto di Spoleto PG 18 1075 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
56 Km E of Perugia (166134 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
97 Km NE of Viterbo (67173 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
Reviewed
Rev100 		ML 1.1 2021-02-19
03:49:29		 42.9532 13.0468 10 2021-02-19
04:06:24		 Sala Sismica INGV-Roma 87289201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-19 03:49:29 ± 0.08
Latitude 42.9532 ± 0.0063
Longitude 13.0468 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87289201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 725
Semi-minor axis of confidence ellipse (meter) 321
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
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) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.11152
Epicentral distance of station farthest from the epicenter (degree) 0.30397
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:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 87289201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-19 04:06:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-02-19T03:49:41.50 0.6 undecidable manual S 83 33.744 50 0.59 44
IV.GAVE.EHZ. 2021-02-19T03:49:40.32 0.6 undecidable manual S 203 31.4463 50 0 51
IV.ASSB.HHZ. 2021-02-19T03:49:40.56 0.6 undecidable manual S 288 33.0447 50 -0.17 49
IV.MMO1.EHZ. 2021-02-19T03:49:37.67 0.6 undecidable manual S 105 23.4543 113 -0.42 47
IV.MF5.EHZ. 2021-02-19T03:49:36.13 0.6 positive manual P 83 33.744 50 0.16 49
IV.CSP1.EHZ. 2021-02-19T03:49:36.83 0.6 undecidable manual S 40 20.0688 117 -0.17 50
IV.MC2.EHZ. 2021-02-19T03:49:35.00 0.6 undecidable manual S 112 12.3765 129 0.23 50
IV.CESI.HHZ. 2021-02-19T03:49:35.05 0.6 undecidable manual S 297 12.876 128 0.15 51
IV.GAVE.EHZ. 2021-02-19T03:49:35.61 1.0 positive manual P 203 31.4463 50 -0.02 25
IV.ASSB.HHZ. 2021-02-19T03:49:35.63 0.1 positive manual P 288 33.0447 50 -0.23 97
IV.MMO1.EHZ. 2021-02-19T03:49:34.10 0.3 positive manual P 105 23.4543 113 -0.24 74
IV.CSP1.EHZ. 2021-02-19T03:49:33.62 0.3 negative manual P 40 20.0688 117 -0.09 77
IV.MC2.EHZ. 2021-02-19T03:49:32.65 1.0 undecidable manual P 112 12.3765 129 0.23 25
IV.CESI.HHZ. 2021-02-19T03:49:32.75 0.1 positive manual P 297 12.876 128 0.25 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.4 0.0002915 0.2 AML other m 2021-02-19T03:49:35.52
IV.CESI.HHE. ML:1.1 0.000132 0.38 AML other m 2021-02-19T03:49:35.52
IV.CSP1.EHN. ML:1.4 0.000187 1.2 AML other m 2021-02-19T03:49:37.27
IV.CSP1.EHE. ML:1.2 0.0001109 1.44 AML other m 2021-02-19T03:49:38.00
IV.ASSB.HHE. ML:0.8 0.00002375 0.88 AML other m 2021-02-19T03:49:40.68
IV.ASSB.HHN. ML:0.8 0.000024750000000000002 1.12 AML other m 2021-02-19T03:49:41.78
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