Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 26-10-2020 and time 12:40:10 (Italy) in region 2 km SW Castelsantangelo sul Nera (MC)

A magnitude ML 1.4 earthquake occured in region: 2 km SW Castelsantangelo sul Nera (MC), on

  • 26-10-2020 11:40:10 (UTC)
  • 26-10-2020 12:40:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8860, 13.1400 at 8 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
Visso MC 7 1107 1388
Ussita MC 7 444 1832
Preci PG 8 724 2556
Norcia PG 11 4957 7513
Bolognola MC 14 142 7655
Montemonaco AP 15 604 8259
Acquacanina MC 16 121 8380
Montegallo AP 17 523 8903
Monte Cavallo MC 17 145 9048
Fiastra MC 17 559 9607
Sellano PG 17 1079 10686
Fiordimonte MC 17 202 10888
Montefortino FM 18 1178 12066
Arquata del Tronto AP 18 1178 13244
Pieve Torina MC 19 1458 14702
Cerreto di Spoleto PG 20 1075 15777

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
53 Km W of Teramo (54892 inhabitants)
54 Km NE of Terni (111501 inhabitants)
63 Km NW of L'Aquila (69753 inhabitants)
66 Km E of Perugia (166134 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
99 Km NE of Viterbo (67173 inhabitants)
100 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
Reviewed
Rev100 		ML 1.4 2020-10-26
11:40:10		 42.8855 13.1397 8 2020-10-26
11:46:50		 Sala Sismica INGV-Roma 84152701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-26 11:40:10 ± 0.08
Latitude 42.8855 ± 0.0027
Longitude 13.1397 ± 0.0049
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84152701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 350
Semi-minor axis of confidence ellipse (meter) 38
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38041
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 84152701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-26 11:46:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUMA.HHZ. 2020-10-26T11:40:19.72 0.3 undecidable manual S 39 25.2525 108 0.29 68
IV.CESI.HHZ. 2020-10-26T11:40:19.13 0.3 undecidable manual S 305 23.2545 110 0.37 67
IV.CSP1.EHZ. 2020-10-26T11:40:18.69 0.3 undecidable manual S 13 23.4543 110 -0.15 71
IV.ASSB.HHZ. 2020-10-26T11:40:18.55 3.0 undecidable manual P -0.03 0
IV.RM33.EHZ. 2020-10-26T11:40:18.27 0.3 undecidable manual P 172 42.2244 50 -0.2 68
IV.MMO1.EHZ. 2020-10-26T11:40:16.18 0.3 undecidable manual S 84 15.2736 119 -0.06 73
IV.MF5.EHZ. 2020-10-26T11:40:16.35 0.3 undecidable manual P 66 28.3494 106 0.23 69
IV.FDMO.HHZ. 2020-10-26T11:40:16.59 0.3 undecidable manual S 346 17.2716 116 -0.26 70
IV.LNSS.HHZ. 2020-10-26T11:40:16.70 0.3 undecidable manual P 194 32.3454 104 -0.2 69
IV.CESI.HHZ. 2020-10-26T11:40:15.15 0.3 undecidable manual P 305 23.2545 110 0.01 73
IV.CSP1.EHZ. 2020-10-26T11:40:15.00 0.3 undecidable manual P 13 23.4543 110 -0.19 70
IV.GUMA.HHZ. 2020-10-26T11:40:15.63 0.3 undecidable manual P 39 25.2525 108 0.1 71
IV.MTRA.EHZ. 2020-10-26T11:40:15.63 0.3 undecidable manual P 124 25.3524 108 0.09 71
IV.MC2.EHZ. 2020-10-26T11:40:13.36 0.3 undecidable manual S 54 4.8951 149 -0.2 72
IV.MMO1.EHZ. 2020-10-26T11:40:13.73 0.1 undecidable manual P 84 15.2736 119 0.05 98
IV.NRCA.HNZ. 2020-10-26T11:40:13.72 0.3 undecidable manual S 200 6.0939 144 -0.07 74
IV.FDMO.HHZ. 2020-10-26T11:40:13.93 0.1 undecidable manual P 346 17.2716 116 -0.11 96
IV.NRCA.HNZ. 2020-10-26T11:40:12.49 0.1 undecidable manual P 200 6.0939 144 0.22 96
IV.MC2.EHZ. 2020-10-26T11:40:12.15 0.1 undecidable manual P 54 4.8951 149 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:1.4 0.00016249999999999997 1.52 AML other m 2020-10-26T11:40:20.93
IV.NRCA.HHE. ML:1.9 0.00145 0.1 AML other m 2020-10-26T11:40:14.72
IV.FDMO.HHN. ML:1.0 0.00009395000000000001 0.22 AML other m 2020-10-26T11:40:16.88
IV.CESI.HHE. ML:1.3 0.00012654999999999999 0.26 AML other m 2020-10-26T11:40:19.28
IV.CESI.HHN. ML:1.5 0.00020600000000000002 0.26 AML other m 2020-10-26T11:40:19.32
IV.GUMA.HHN. ML:1.7 0.000299 1.06 AML other m 2020-10-26T11:40:20.61
IV.MTRA.EHE. ML:1.4 0.000148 1.22 AML other m 2020-10-26T11:40:21.96
IV.MF5.EHE. ML:1.3 0.00011444999999999999 0.5 AML other m 2020-10-26T11:40:21.68
IV.GUMA.HHE. ML:1.7 0.00028100000000000005 0.24 AML other m 2020-10-26T11:40:21.33
IV.LNSS.HHN. ML:1.5 0.000134 0.96 AML other m 2020-10-26T11:40:23.39
IV.LNSS.HHE. ML:1.4 0.000125 0.1 AML other m 2020-10-26T11:40:23.68
IV.ASSB.HHE. ML:1.4 0.0000837 0.08 AML other m 2020-10-26T11:40:25.00
IV.ASSB.HHN. ML:1.3 0.00007055000000000001 1.46 AML other m 2020-10-26T11:40:25.88
IV.FDMO.HHE. ML:0.9 0.00006623178000000001 0.1792 AML other m 2020-10-26T11:40:21.50
IV.MF5.EHN. ML:1.2 0.000075035405 0.64 AML other m 2020-10-26T11:40:26.01
IV.RM33.EHN. ML:1.0 0.000034811695000000004 0.1408 AML other m 2020-10-26T11:40:25.30
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