Earthquake with magnitude of ML 1.1 on date 17-04-2021 and time 14:52:23 (Italy) in region 4 km NW Visso (MC)

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

  • 17-04-2021 12:52:23 (UTC)
  • 17-04-2021 14:52:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9520, 13.0500 at 12 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.

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 7 444 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 15 915 7901
Bolognola MC 15 142 8043
Serravalle di Chienti MC 16 1070 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 2021-04-17
12:52:23
42.952 13.05 12 2021-04-17
12:58:33
Sala Sismica INGV-Roma 89175881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-17 12:52:23 ± 0.07
Latitude 42.9520 ± 0.0027
Longitude 13.0500 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89175881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 346
Semi-minor axis of confidence ellipse (meter) 152
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00989
Epicentral distance of station farthest from the epicenter (degree) 0.20954
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 89175881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-17 12:58:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-04-17T12:52:32.37 0.6 undecidable manual S 104 23.2545 92 -0.09 48
IV.CSP1.EHZ. 2021-04-17T12:52:31.60 0.3 undecidable manual S 39 19.9689 93 0.02 73
IV.MML1.HNE. 2021-04-17T12:52:31.21 0.6 undecidable manual S 341 18.9699 94 -0.12 48
IV.NRCA.HHZ. 2021-04-17T12:52:29.70 0.3 undecidable manual S 158 14.1747 104 -0.35 69
IV.CESI.HHZ. 2021-04-17T12:52:29.76 0.3 undecidable manual S 296 13.1757 108 -0.03 74
IV.MC2.EHZ. 2021-04-17T12:52:29.74 0.3 undecidable manual S 112 12.1767 113 0.2 72
IV.MMO1.EHZ. 2021-04-17T12:52:28.81 0.6 negative manual P 104 23.2545 92 0.01 49
IV.MML1.HNE. 2021-04-17T12:52:28.08 0.1 undecidable manual P 341 18.9699 94 -0.07 97
IV.FDMO.HHZ. 2021-04-17T12:52:28.83 0.1 undecidable manual S 18 9.879 124 -0.17 96
IT.MTCL.HGN. 2021-04-17T12:52:28.08 0.6 undecidable manual S 319 6.1938 142 -0.21 48
IV.CSP1.EHZ. 2021-04-17T12:52:28.37 0.1 undecidable manual P 39 19.9689 93 0.08 97
IV.CESI.HHZ. 2021-04-17T12:52:27.38 0.6 negative manual P 296 13.1757 108 0.12 49
IV.FEMA.HNN. 2021-04-17T12:52:27.92 0.6 undecidable manual S 359 1.0989 173 0.15 49
IV.MC2.EHZ. 2021-04-17T12:52:27.40 1.0 negative manual P 112 12.1767 113 0.28 24
IV.NRCA.HHZ. 2021-04-17T12:52:27.42 0.6 undecidable manual P 158 14.1747 104 0.02 49
IV.FEMA.HNN. 2021-04-17T12:52:26.28 0.1 undecidable manual P 359 1.0989 173 0.19 98
IV.FDMO.HHZ. 2021-04-17T12:52:26.88 0.6 undecidable manual P 18 9.879 124 0.08 49
IT.MTCL.HGN. 2021-04-17T12:52:26.42 0.1 undecidable manual P 319 6.1938 142 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.9 0.0000894 1.84 AML other m 2021-04-17T12:52:29.99
IV.FDMO.HHE. ML:0.7 0.000052544855 0.0832 AML other m 2021-04-17T12:52:29.15
IV.CESI.HHN. ML:1.3 0.00021349999999999999 0.12 AML other m 2021-04-17T12:52:30.02
IV.CESI.HHE. ML:1.1 0.00011767625000000001 0.1024 AML other m 2021-04-17T12:52:30.02
IV.CESI.HNN. ML:1.3 0.00020759260000000003 0.1216 AML other m 2021-04-17T12:52:30.03
IV.CESI.HNE. ML:1.1 0.00013433610000000002 0.928 AML other m 2021-04-17T12:52:27.17
IV.CSP1.EHE. ML:1.0 0.00007851363 0.1024 AML other m 2021-04-17T12:52:32.12
IV.CSP1.EHN. ML:1.1 0.00008470479000000001 0.1984 AML other m 2021-04-17T12:52:32.50
IV.NRCA.HHE. ML:0.8 0.00005357522 0.1024 AML other m 2021-04-17T12:52:29.94
IV.NRCA.HHN. ML:0.8 0.000057174075000000004 0.1216 AML other m 2021-04-17T12:52:30.73
IV.NRCA.HNE. ML:1.1 0.00011743721 0.5504 AML other m 2021-04-17T12:52:35.61
IV.NRCA.HNN. ML:1.4 0.00021684335 0.7872 AML other m 2021-04-17T12:52:29.55
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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