Earthquake with magnitude of ML 0.4 on date 23-10-2020 and time 12:40:11 (Italy) in region 5 km SW Castelsantangelo sul Nera (MC)

A magnitude ML 0.4 earthquake occured in region: 5 km SW Castelsantangelo sul Nera (MC), on

  • 23-10-2020 10:40:11 (UTC)
  • 23-10-2020 12:40:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.86, 13.12 at 8 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.

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 7 724 1005
Norcia PG 8 4957 5962
Visso MC 9 1107 7069
Ussita MC 10 444 7513
Sellano PG 16 1079 8592
Arquata del Tronto AP 17 1178 9770
Montegallo AP 17 523 10293
Montemonaco AP 17 604 10897
Bolognola MC 17 142 11039
Cerreto di Spoleto PG 18 1075 12114
Cascia PG 18 3217 15331
Monte Cavallo MC 18 145 15476
Acquacanina MC 20 121 15597
Fiastra MC 20 559 16156

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
51 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Perugia (166134 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
99 Km W of Pescara (121014 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 0.4 2020-10-23
10:40:11
42.86 13.13 8 2021-02-26
14:56:11
Bollettino Sismico Italiano INGV 85631211
Reviewed
Rev100
ML 1.3 2020-10-23
10:40:09
42.8 13.13 13 2020-10-23
10:50:28
Sala Sismica INGV-Roma 84053231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-23 10:40:11 ± 0.18
Latitude 42.86 ± 0.00
Longitude 13.13 ± 0.00
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85631211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 363
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 48
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.24012
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 85631211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-22 16:27:10

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 84053231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-23 10:50:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-10-23T10:40:20.53 0.6 undecidable manual S 14 0.2401 107 -0.13 48
IV.CESI.HHE. 2020-10-23T10:40:19.91 0.6 undecidable manual S 312 0.2176 108 0.07 49
IV.FDMO.HHZ. 2020-10-23T10:40:18.74 0.6 undecidable manual S 351 0.1799 112 0.27 47
IV.MMO1.HNE. 2020-10-23T10:40:17.51 0.6 undecidable manual S 75 0.1529 115 -0.01 50
IV.CSP1.EHZ. 2020-10-23T10:40:16.45 0.3 undecidable manual P 14 0.2401 107 -0.14 72
IV.CESI.HHE. 2020-10-23T10:40:15.77 0.6 undecidable manual P 312 0.2176 108 -0.34 46
IV.FDMO.HHZ. 2020-10-23T10:40:15.34 0.3 undecidable manual P 351 0.1799 112 0.02 75
IV.MMO1.HNE. 2020-10-23T10:40:14.75 0.3 undecidable manual P 75 0.1529 115 -0.02 75
IV.MC2.EHZ. 2020-10-23T10:40:14.79 0.3 undecidable manual S 41 0.0701 135 -0.09 76
IV.MC2.EHZ. 2020-10-23T10:40:13.43 0.1 undecidable manual P 41 0.0701 135 0.19 99
IV.NRCA.HHZ. 2020-10-23T10:40:13.72 0.6 undecidable manual S 198 0.0261 160 -0.23 49
IV.NRCA.HHZ. 2020-10-23T10:40:12.87 0.1 undecidable manual P 198 0.0261 160 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.000263 0.54 AML other m 2020-10-23T10:40:14.35
IV.NRCA.HNE. ML:0 0.0002267794 0.1408 AML other m 2020-10-23T10:40:14.19
IV.NRCA.HNN. ML:0 0.0002130943 0.128 AML other m 2020-10-23T10:40:14.89
IV.NRCA.HHN. ML:0 0.0002120488 0.1216 AML other m 2020-10-23T10:40:14.94
IV.GAVE.EHN. ML:0.6 2.6455245E-5 0.0832 AML other m 2020-10-23T10:40:21.43
IV.GAVE.EHE. ML:0.9 4.932602E-5 0.1152 AML other m 2020-10-23T10:40:21.07
IV.FDMO.HHE. ML:0.1 9.5860875E-6 0.1984 AML other m 2020-10-23T10:40:19.71
IV.FDMO.HHN. ML:0.1 1.097743E-5 0.224 AML other m 2020-10-23T10:40:19.01
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