Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 21-05-2021 and time 06:14:26 (Italy) in region 5 km SW Castelsantangelo sul Nera (MC)

A magnitude ML 0.7 earthquake occured in region: 5 km SW Castelsantangelo sul Nera (MC), on

  • 21-05-2021 04:14:26 (UTC)
  • 21-05-2021 06:14:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8690, 13.1100 at 6 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
Castelsantangelo sul Nera MC 5 281 281
Preci PG 6 724 1005
Visso MC 7 1107 2112
Norcia PG 9 4957 7069
Ussita MC 9 444 7513
Sellano PG 15 1079 8592
Monte Cavallo MC 17 145 8737
Cerreto di Spoleto PG 17 1075 9812
Bolognola MC 17 142 9954
Montemonaco AP 18 604 10558
Cascia PG 18 3217 13775
Montegallo AP 19 523 14298
Arquata del Tronto AP 19 1178 15476
Acquacanina MC 19 121 15597
Fiordimonte MC 19 202 15799
Fiastra MC 19 559 16358

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
51 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
64 Km E of Perugia (166134 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
96 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
Reviewed
Rev100 		ML 0.7 2021-05-21
04:14:26		 42.8687 13.1098 6 2021-05-21
04:18:42		 Sala Sismica INGV-Roma 90318581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-21 04:14:26 ± 0.1
Latitude 42.8687 ± 0.0027
Longitude 13.1098 ± 0.0037
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90318581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 269
Semi-minor axis of confidence ellipse (meter) 169
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.03507
Epicentral distance of station farthest from the epicenter (degree) 0.23652
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:0.7

Field Value
Value 0.7
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 90318581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-21 04:18:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-05-21T04:14:35.10 0.3 undecidable manual S 17 25.9518 103 -0.17 72
IV.CESI.HHZ. 2021-05-21T04:14:33.96 0.3 undecidable manual S 312 22.4553 105 -0.16 72
IV.MMO1.EHZ. 2021-05-21T04:14:32.63 0.3 undecidable manual S 79 17.9709 109 0.02 75
IV.FDMO.HHZ. 2021-05-21T04:14:32.98 0.3 undecidable manual S 354 18.7701 108 0.12 74
IV.GAVE.EHZ. 2021-05-21T04:14:31.40 0.3 undecidable manual P 222 26.2515 103 -0.03 74
IV.CSP1.EHZ. 2021-05-21T04:14:31.23 0.3 undecidable manual P 17 25.9518 103 -0.13 72
IV.FDMO.HHZ. 2021-05-21T04:14:30.14 0.3 undecidable manual P 354 18.7701 108 0.17 73
IV.CESI.HHZ. 2021-05-21T04:14:30.83 0.3 undecidable manual P 312 22.4553 105 0.13 73
IV.MMO1.EHZ. 2021-05-21T04:14:29.72 0.3 undecidable manual P 79 17.9709 109 -0.11 74
IV.MC2.EHZ. 2021-05-21T04:14:29.61 0.3 undecidable manual S 54 7.9809 128 0.09 75
IV.NRCA.HHZ. 2021-05-21T04:14:28.40 0.3 undecidable manual S 175 3.8961 148 -0.15 75
IV.MC2.EHZ. 2021-05-21T04:14:28.07 0.3 undecidable manual P 54 7.9809 128 0.03 76
IV.NRCA.HHZ. 2021-05-21T04:14:27.63 0.1 undecidable manual P 175 3.8961 148 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0.0 0.00059063515 0.08 AML other m 2021-05-21T04:14:28.71
IV.NRCA.HHN. ML:0.0 0.000447411 0.1376 AML other m 2021-05-21T04:14:29.07
IV.NRCA.HNE. ML:0.0 0.0005558813 0.0896 AML other m 2021-05-21T04:14:28.71
IV.NRCA.HNN. ML:0.0 0.00035541109999999996 0.0704 AML other m 2021-05-21T04:14:29.00
IV.FDMO.HHE. ML:0.6 0.000036725425 0.2176 AML other m 2021-05-21T04:14:34.14
IV.FDMO.HHN. ML:0.6 0.000035174045 0.2208 AML other m 2021-05-21T04:14:33.30
IV.CESI.HHE. ML:0.6 0.000028681820000000002 0.08 AML other m 2021-05-21T04:14:35.99
IV.CESI.HHN. ML:0.8 0.000039500254999999995 0.16 AML other m 2021-05-21T04:14:36.16
IV.CSP1.EHE. ML:0.7 0.0000324211999 0.1984 AML other m 2021-05-21T04:14:36.01
IV.CSP1.EHN. ML:0.8 0.000033456125 0.4 AML other m 2021-05-21T04:14:37.13
IV.GAVE.EHE. ML:0.8 0.000037730239999999996 0.24 AML other m 2021-05-21T04:14:36.65
IV.GAVE.EHN. ML:1.0 0.000056082839999999994 0.2208 AML other m 2021-05-21T04:14:36.80
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