Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 21-05-2020 and time 11:22:48 (Italy) in region 2 km NW Castelsantangelo sul Nera (MC)

A magnitude ML 1.0 earthquake occured in region: 2 km NW Castelsantangelo sul Nera (MC), on

  • 21-05-2020 09:22:48 (UTC)
  • 21-05-2020 11:22:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9070, 13.1300 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.

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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 2 281 281
Ussita MC 4 444 725
Visso MC 4 1107 1832
Preci PG 8 724 2556
Bolognola MC 13 142 2698
Norcia PG 13 4957 7655
Acquacanina MC 14 121 7776
Monte Cavallo MC 14 145 7921
Fiastra MC 15 559 8480
Fiordimonte MC 15 202 8682
Montemonaco AP 16 604 9286
Sellano PG 17 1079 10365
Pieve Torina MC 17 1458 11823
Montefortino FM 18 1178 13001
Pievebovigliana MC 18 866 13867
Montegallo AP 18 523 14390
Cerreto di Spoleto PG 20 1075 15465

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
54 Km NW of Teramo (54892 inhabitants)
55 Km NE of Terni (111501 inhabitants)
64 Km E of Perugia (166134 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
100 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 1.0 2020-05-21
09:22:48		 42.9067 13.1305 12 2020-05-21
09:31:53		 Sala Sismica INGV-Roma 79399571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-21 09:22:48 ± 0.1
Latitude 42.9067 ± 0.0045
Longitude 13.1305 ± 0.0037
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 79399571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 385
Semi-minor axis of confidence ellipse (meter) 335
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 35
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.19245
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 79399571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-21 09:31:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2020-05-21T09:23:04.71 3.0 negative manual P 0.02 0
IV.CESI.HHZ. 2020-05-21T09:22:56.79 0.1 undecidable manual S 301 21.3675 97 0.11 96
IV.CSP1.EHZ. 2020-05-21T09:22:56.74 0.1 undecidable manual S 16 21.3675 97 0.04 98
IV.MMO1.EHZ. 2020-05-21T09:22:55.10 0.1 undecidable manual S 93 15.9729 105 -0.17 96
IV.FDMO.HHZ. 2020-05-21T09:22:54.80 0.1 undecidable manual S 346 14.7741 108 -0.17 95
IT.MTCL.HGN. 2020-05-21T09:22:54.64 0.1 undecidable manual S 312 14.3745 109 -0.22 94
IV.FEMA.HNN. 2020-05-21T09:22:53.58 0.1 undecidable manual S 313 8.9799 131 -0.04 99
IV.MC2.EHZ. 2020-05-21T09:22:53.14 0.3 undecidable manual S 84 4.7952 152 0.22 73
IV.CESI.HHZ. 2020-05-21T09:22:53.29 0.1 undecidable manual P 301 21.3675 97 0.06 97
IV.CSP1.EHZ. 2020-05-21T09:22:53.22 0.3 undecidable manual P 16 21.3675 97 -0.02 73
IV.NRCA.HHZ. 2020-05-21T09:22:53.15 0.1 undecidable manual S 189 8.1807 135 -0.32 94
IV.MMO1.EHZ. 2020-05-21T09:22:52.42 0.3 undecidable manual P 93 15.9729 105 0.01 74
IV.FDMO.HHZ. 2020-05-21T09:22:52.27 0.3 undecidable manual P 346 14.7741 108 0.03 74
IT.MTCL.HGN. 2020-05-21T09:22:52.19 0.1 undecidable manual P 312 14.3745 109 0.01 99
IV.NRCA.HHZ. 2020-05-21T09:22:51.39 0.1 undecidable manual P 189 8.1807 135 0.02 100
IV.FEMA.HNN. 2020-05-21T09:22:51.70 0.3 undecidable manual P 313 8.9799 131 0.24 72
IV.MC2.EHZ. 2020-05-21T09:22:51.26 0.1 negative manual P 84 4.7952 152 0.2 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.0004125 0.16 AML other m 2020-05-21T09:22:53.32
IV.NRCA.HHE. ML:1.4 0.00034750000000000004 0.46 AML other m 2020-05-21T09:22:53.34
IV.FDMO.HHE. ML:0.8 0.000049411049999999995 0.2176 AML other m 2020-05-21T09:22:54.84
IV.FDMO.HHN. ML:0.6 0.000033549125 0.2432 AML other m 2020-05-21T09:22:54.93
IV.CSP1.EHE. ML:1.0 0.000058644225 0.0768 AML other m 2020-05-21T09:22:56.00
IV.CSP1.EHN. ML:1.0 0.00006501869 0.3648 AML other m 2020-05-21T09:22:56.89
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