Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 16-04-2021 and time 06:05:30 (Italy) in region 5 km S Visso (MC)

A magnitude ML 0.7 earthquake occured in region: 5 km S Visso (MC), on

  • 16-04-2021 04:05:30 (UTC)
  • 16-04-2021 06:05:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8910, 13.0970 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
Visso MC 5 1107 1107
Castelsantangelo sul Nera MC 5 281 1388
Preci PG 5 724 2112
Ussita MC 7 444 2556
Norcia PG 11 4957 7513
Sellano PG 14 1079 8592
Monte Cavallo MC 14 145 8737
Bolognola MC 16 142 8879
Fiordimonte MC 16 202 9081
Cerreto di Spoleto PG 17 1075 10156
Acquacanina MC 17 121 10277
Fiastra MC 17 559 10836
Pieve Torina MC 18 1458 12294
Montemonaco AP 19 604 12898
Pievebovigliana MC 19 866 13764

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
52 Km NE of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
97 Km NE of Viterbo (67173 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 0.7 2021-04-16
04:05:30		 42.8907 13.0968 10 2021-07-12
16:55:07		 Bollettino Sismico Italiano INGV 89318021
Reviewed
Rev100 		ML 0.7 2021-04-16
04:05:30		 42.8933 13.0995 9 2021-04-16
04:11:22		 Sala Sismica INGV-Roma 89133011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-16 04:05:30 ± 0.17
Latitude 42.8907 ± 0.0045
Longitude 13.0968 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89318021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 401
Semi-minor axis of confidence ellipse (meter) 297
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 40
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.21584
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 89133011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-16 04:11:22

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 89318021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-21 05:40:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-04-16T04:05:39.29 0.1 undecidable manual S 21 23.9538 113 -0.15 96
IV.CESI.HHZ. 2021-04-16T04:05:38.28 0.3 undecidable manual S 309 20.0688 116 0.06 74
IV.MMO1.EHZ. 2021-04-16T04:05:37.80 0.1 undecidable manual S 87 18.6702 118 0.02 100
IV.CSP1.EHZ. 2021-04-16T04:05:35.64 0.1 undecidable manual P 21 23.9538 113 0.01 99
IV.MC2.EHZ. 2021-04-16T04:05:35.05 0.1 undecidable manual S 73 7.881 142 0.22 98
IV.NRCA.HHZ. 2021-04-16T04:05:34.36 0.1 undecidable manual S 167 6.4935 147 -0.2 98
IV.MMO1.EHZ. 2021-04-16T04:05:34.69 0.1 undecidable manual P 87 18.6702 118 0.02 100
IV.CESI.HHZ. 2021-04-16T04:05:34.94 0.1 undecidable manual P 309 20.0688 116 0.02 100
IV.MC2.EHZ. 2021-04-16T04:05:32.77 0.3 undecidable manual P 73 7.881 142 -0.2 74
IV.NRCA.HHZ. 2021-04-16T04:05:32.96 0.1 negative manual P 167 6.4935 147 0.15 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.0 0.000139 0.1 AML other m 2021-04-16T04:05:34.54
IV.NRCA.HHE. ML:0.6 0.0000627 0.36 AML other m 2021-04-16T04:05:34.51
IV.CESI.HHN. ML:0.7 0.000040999999999999994 0.28 AML other m 2021-04-16T04:05:38.46
IV.CESI.HHE. ML:0.4 0.000022150000000000003 0.1 AML other m 2021-04-16T04:05:38.47
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