Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 17-10-2020 and time 16:01:38 (UTC) in region 6 km E Castelsantangelo sul Nera (MC)

A magnitude ML 0.8 earthquake occured in region: 6 km E Castelsantangelo sul Nera (MC), on

  • 17-10-2020 16:01:38 (UTC)
  • 17-10-2020 18:01:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8710, 13.2210 at 14 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 6 281 281
Montemonaco AP 9 604 885
Montegallo AP 10 523 1408
Ussita MC 11 444 1852
Arquata del Tronto AP 13 1178 3030
Montefortino FM 13 1178 4208
Visso MC 13 1107 5315
Norcia PG 14 4957 10272
Bolognola MC 14 142 10414
Preci PG 15 724 11138
Amandola FM 17 3629 14767
Acquacanina MC 18 121 14888
Comunanza AP 19 3166 18054
Acquasanta Terme AP 19 2916 20970
Fiastra MC 19 559 21529
Sarnano MC 20 3264 24793
Accumoli RI 20 667 25460
Palmiano AP 20 196 25656

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
46 Km NW of Teramo (54892 inhabitants)
58 Km NE of Terni (111501 inhabitants)
60 Km N of L'Aquila (69753 inhabitants)
73 Km E of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
87 Km S of Ancona (100861 inhabitants)
93 Km W of Pescara (121014 inhabitants)
97 Km NW of Chieti (51815 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 0.8 2020-10-17
16:01:38		 42.8712 13.2208 14 2020-10-17
16:07:38		 Sala Sismica INGV-Roma 83852931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-17 16:01:38 ± 0.07
Latitude 42.8712 ± 0.0045
Longitude 13.2208 ± 0.0074
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83852931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 555
Semi-minor axis of confidence ellipse (meter) 408
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 228
Circular confidence region, given by single value of horizontal uncertainty (meter) 560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.37502
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 83852931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-17 16:07:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.CSO1.HGZ. 2020-10-17T16:02:01.67 3.0 undecidable manual S 0 0
IV.TERO.HNE. 2020-10-17T16:01:52.59 0.6 undecidable manual S 131 41.625 96 0.06 47
IV.GAVE.HNZ. 2020-10-17T16:01:49.01 3.0 undecidable manual Sg -0.27 0
IV.CESI.HNE. 2020-10-17T16:01:49.44 0.6 undecidable manual S 300 29.6481 100 0.08 48
IV.SMA1.EHZ. 2020-10-17T16:01:48.78 0.6 undecidable manual S 161 28.2495 100 -0.22 47
IV.CSP1.EHZ. 2020-10-17T16:01:48.20 0.6 undecidable manual S 357 24.4533 103 0.19 47
IV.TERO.HNE. 2020-10-17T16:01:46.48 0.1 undecidable manual P 131 41.625 96 -0.3 89
IV.SMA1.EHZ. 2020-10-17T16:01:45.23 0.1 undecidable manual P 161 28.2495 100 0.49 88
IV.MMO1.EHZ. 2020-10-17T16:01:44.34 0.6 undecidable manual S 70 9.1797 138 -0.07 50
IV.NRCA.HHZ. 2020-10-17T16:01:44.26 0.6 undecidable manual S 244 9.5793 136 -0.23 48
IV.CESI.HNE. 2020-10-17T16:01:44.87 0.1 undecidable manual P 300 29.6481 100 -0.08 96
IV.MC2.EHZ. 2020-10-17T16:01:43.90 0.6 undecidable manual S 330 5.1948 155 0.08 50
IV.FDMO.HHZ. 2020-10-17T16:01:43.67 0.1 undecidable manual P 329 21.2676 107 -0.02 98
IV.CSP1.EHZ. 2020-10-17T16:01:43.93 0.1 undecidable manual P 357 24.4533 103 -0.24 93
IV.NRCA.HHZ. 2020-10-17T16:01:42.18 0.1 undecidable manual P 244 9.5793 136 0.04 99
IV.MMO1.EHZ. 2020-10-17T16:01:42.12 0.1 undecidable manual P 70 9.1797 138 0.03 100
IV.MC2.EHZ. 2020-10-17T16:01:41.83 0.1 undecidable manual P 330 5.1948 155 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:0.9 0.00008407914 0.0768 AML other m 2020-10-17T16:01:44.81
IV.NRCA.HHN. ML:1.1 0.0001293652 0.1408 AML other m 2020-10-17T16:01:44.49
IV.CSP1.EHE. ML:0.6 0.000022389015 0.3584 AML other m 2020-10-17T16:01:49.69
IV.CSP1.EHN. ML:0.6 0.000017872550000000002 0.1408 AML other m 2020-10-17T16:01:50.32
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