Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 15-04-2021 and time 06:21:16 (Italy) in region 4 km W Monte Cavallo (MC)

A magnitude ML 1.0 earthquake occured in region: 4 km W Monte Cavallo (MC), on

  • 15-04-2021 04:21:16 (UTC)
  • 15-04-2021 06:21:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9920, 12.9490 at 7 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
Monte Cavallo MC 4 145 145
Serravalle di Chienti MC 9 1070 1215
Pieve Torina MC 10 1458 2673
Sellano PG 11 1079 3752
Fiordimonte MC 13 202 3954
Muccia MC 13 915 4869
Visso MC 13 1107 5976
Pievebovigliana MC 14 866 6842
Preci PG 15 724 7566
Ussita MC 16 444 8010
Sefro MC 17 422 8432
Valtopina PG 18 1398 9830
Fiastra MC 18 559 10389
Nocera Umbra PG 19 5839 16228
Camerino MC 19 6974 23202
Acquacanina MC 19 121 23323
Cerreto di Spoleto PG 19 1075 24398
Castelsantangelo sul Nera MC 20 281 24679

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Foligno (57155 inhabitants)
47 Km E of Perugia (166134 inhabitants)
54 Km NE of Terni (111501 inhabitants)
72 Km NW of Teramo (54892 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
84 Km SW of Ancona (100861 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
95 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 1.0 2021-04-15
04:21:16		 42.9915 12.9487 7 2021-04-15
04:31:16		 Sala Sismica INGV-Roma 89105561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-15 04:21:16 ± 0.09
Latitude 42.9915 ± 0.0027
Longitude 12.9487 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 89105561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 308
Semi-minor axis of confidence ellipse (meter) 99
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 183
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 26
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33455
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 89105561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-15 04:31:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-04-15T04:21:35.34 3.0 undecidable manual S -0.06 0
IV.NARO.HHZ. 2021-04-15T04:21:30.84 3.0 positive manual P 0.65 0
IV.MOMA.HHZ. 2021-04-15T04:21:29.86 0.3 undecidable manual S 236 37.1295 101 0.2 68
IV.ATCC.EHZ. 2021-04-15T04:21:28.20 0.3 undecidable manual S 311 32.9448 103 -0.04 71
IV.GAVE.EHN. 2021-04-15T04:21:28.49 0.3 undecidable manual S 188 33.5442 102 0.07 71
IV.MMO1.EHZ. 2021-04-15T04:21:27.57 0.3 undecidable manual S 108 32.3454 103 -0.47 65
IV.CSP1.EHZ. 2021-04-15T04:21:25.03 0.3 undecidable manual S 62 23.5542 107 -0.05 72
IV.PF6.EHZ. 2021-04-15T04:21:25.58 0.3 undecidable manual S 51 25.6521 106 -0.21 69
IV.ASSB.HHZ. 2021-04-15T04:21:25.21 0.3 undecidable manual S 284 24.1536 107 -0.08 72
IV.EL6.EHZ. 2021-04-15T04:21:24.12 3.0 negative manual P -0.2 0
IV.MC2.EHZ. 2021-04-15T04:21:24.88 0.3 undecidable manual S 114 21.4674 109 0.5 66
IV.NRCA.HHZ. 2021-04-15T04:21:24.65 0.3 undecidable manual S 142 22.0668 108 0.05 72
IV.ATCC.EHZ. 2021-04-15T04:21:23.10 1.0 undecidable manual P 311 32.9448 103 -0.19 23
IV.GAVE.EHN. 2021-04-15T04:21:23.90 1.0 undecidable manual P 188 33.5442 102 0.51 21
IV.MOMA.HHZ. 2021-04-15T04:21:23.70 0.3 undecidable manual P 236 37.1295 101 -0.41 65
IV.MML1.HNZ. 2021-04-15T04:21:22.12 0.3 undecidable manual S 8 13.6752 118 0.22 71
IV.MMO1.EHZ. 2021-04-15T04:21:22.82 0.1 undecidable manual P 108 32.3454 103 -0.35 89
IV.NRCA.HHZ. 2021-04-15T04:21:21.14 0.1 undecidable manual P 142 22.0668 108 -0.05 96
IV.ASSB.HHZ. 2021-04-15T04:21:21.48 0.1 undecidable manual P 284 24.1536 107 -0.1 95
IV.FDMO.HHZ. 2021-04-15T04:21:21.57 0.3 undecidable manual S 66 12.2766 121 0.08 73
IV.CSP1.EHZ. 2021-04-15T04:21:21.62 0.6 undecidable manual P 62 23.5542 107 0.16 47
IV.PF6.EHZ. 2021-04-15T04:21:21.92 0.6 undecidable manual P 51 25.6521 106 0.05 48
IV.MC2.EHZ. 2021-04-15T04:21:21.45 0.6 undecidable manual P 114 21.4674 109 0.39 45
IV.CESI.HHZ. 2021-04-15T04:21:19.30 0.3 undecidable manual S 293 3.8961 152 -0.09 74
IV.MML1.HNZ. 2021-04-15T04:21:19.81 0.1 undecidable manual P 8 13.6752 118 0.18 95
IV.FDMO.HHZ. 2021-04-15T04:21:19.52 0.1 undecidable manual P 66 12.2766 121 0.13 96
IT.MTCL.HGZ. 2021-04-15T04:21:19.12 0.3 undecidable manual S 86 4.0959 151 -0.32 70
IT.MTCL.HGZ. 2021-04-15T04:21:18.22 0.1 undecidable manual P 86 4.0959 151 0.01 100
IV.CESI.HHZ. 2021-04-15T04:21:18.34 0.1 negative manual P 293 3.8961 152 0.16 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHE. ML:0.6 0.00005082592 0.2016 AML other m 2021-04-15T04:21:22.00
IV.FDMO.HHN. ML:0.8 0.00008315 0.18 AML other m 2021-04-15T04:21:22.03
IV.NRCA.HHN. ML:1.0 0.00007646891 0.0992 AML other m 2021-04-15T04:21:24.99
IV.ASSB.HHN. ML:1.0 0.00006535 0.2 AML other m 2021-04-15T04:21:25.60
IV.NRCA.HHE. ML:1.0 0.00006715 0.82 AML other m 2021-04-15T04:21:25.90
IV.ASSB.HHE. ML:0.8 0.00004486735 0.1984 AML other m 2021-04-15T04:21:26.39
IV.CESI.HHE. ML:0.0 0.000719945 0.08 AML other m 2021-04-15T04:21:19.44
IV.CESI.HHN. ML:0.0 0.00060629925 0.1408 AML other m 2021-04-15T04:21:19.47
IV.CESI.HNE. ML:0.0 0.00068504815 0.08 AML other m 2021-04-15T04:21:19.44
IV.CESI.HNN. ML:0.0 0.0005281106 0.0704 AML other m 2021-04-15T04:21:19.46
IV.NRCA.HNE. ML:0.9 0.0000546972375 0.1728 AML other m 2021-04-15T04:21:25.77
IV.NRCA.HNN. ML:1.5 0.00021526315 1.008 AML other m 2021-04-15T04:21:21.56
IV.CSP1.EHE. ML:1.3 0.00012891969999999998 0.56 AML other m 2021-04-15T04:21:25.48
IV.CSP1.EHN. ML:1.1 0.00008962632 0.2816 AML other m 2021-04-15T04:21:26.61
IV.ATCC.EHE. ML:0.5 0.000015349594 0.1216 AML other m 2021-04-15T04:21:28.51
IV.ATCC.EHN. ML:0.5 0.000015893769 0.1792 AML other m 2021-04-15T04:21:29.36
IV.EL6.EHE. ML:1.0 0.00003950046 0.1184 AML other m 2021-04-15T04:21:31.35
IV.EL6.EHN. ML:1.0 0.00004001061 0.1792 AML other m 2021-04-15T04:21:30.75
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