Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 04-11-2020 and time 21:53:31 (Italy) in region 2 km SW Castelsantangelo sul Nera (MC)

A magnitude ML 0.8 earthquake occured in region: 2 km SW Castelsantangelo sul Nera (MC), on

  • 04-11-2020 20:53:31 (UTC)
  • 04-11-2020 21:53:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8850, 13.1410 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
Montegallo AP 16 523 8782
Acquacanina MC 17 121 8903
Monte Cavallo MC 17 145 9048
Fiastra MC 17 559 9607
Sellano PG 17 1079 10686
Fiordimonte MC 18 202 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)
52 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)
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
Reviewed
Rev100 		ML 0.8 2020-11-04
20:53:31		 42.8847 13.1408 8 2020-11-04
21:10:06		 Sala Sismica INGV-Roma 84455241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-04 20:53:31 ± 0.06
Latitude 42.8847 ± 0.0009
Longitude 13.1408 ± 0.0025
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84455241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 172
Semi-minor axis of confidence ellipse (meter) 111
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 291
Circular confidence region, given by single value of horizontal uncertainty (meter) 170.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26440
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 84455241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-04 21:10:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2020-11-04T20:55:09.04 3.0 undecidable manual Sg 7.31 0
CR.STON.BHZ. 2020-11-04T20:55:01.42 3.0 undecidable manual Sn -1.67 0
IV.SARZ.HHZ. 2020-11-04T20:55:01.20 3.0 undecidable manual Sn 1.58 0
CR.ZAG.BHZ. 2020-11-04T20:54:25.66 3.0 undecidable manual Pg 7.75 0
IV.LRP.EHZ. 2020-11-04T20:54:20.65 3.0 undecidable manual Sg 1.4 0
IV.MTMR.EHZ. 2020-11-04T20:54:13.41 3.0 undecidable manual Pg 2.96 0
IV.SBPO.HNZ. 2020-11-04T20:54:02.90 3.0 undecidable manual Pn -1 0
IV.VIVA.HHZ. 2020-11-04T20:53:51.90 3.0 positive manual P -1.23 0
IV.PCRO.HNZ. 2020-11-04T20:53:44.28 3.0 undecidable manual S -0.86 0
IV.GAVE.EHZ. 2020-11-04T20:53:42.06 0.3 undecidable manual S 223 29.3484 105 0.04 72
IV.MML1.HNZ. 2020-11-04T20:53:41.72 0.6 undecidable manual S 332 28.8489 106 -0.15 47
IV.CSP1.EHZ. 2020-11-04T20:53:40.17 0.3 undecidable manual S 13 23.5542 109 0.06 72
IV.FDMO.HHZ. 2020-11-04T20:53:38.09 0.3 undecidable manual S 346 17.3715 115 -0.03 73
IV.MMO1.EHZ. 2020-11-04T20:53:37.36 0.3 undecidable manual S 84 15.1737 118 -0.08 73
IV.MML1.HNZ. 2020-11-04T20:53:37.43 0.3 undecidable manual P 332 28.8489 106 -0.04 72
IV.GAVE.EHZ. 2020-11-04T20:53:37.52 0.1 undecidable manual P 223 29.3484 105 -0.04 96
IV.CSP1.EHZ. 2020-11-04T20:53:36.46 0.3 undecidable manual P 13 23.5542 109 0 73
IV.FDMO.HHZ. 2020-11-04T20:53:35.41 0.1 undecidable manual P 346 17.3715 115 0.09 97
IV.NRCA.HHZ. 2020-11-04T20:53:34.86 0.3 undecidable manual S 201 6.0939 143 -0.12 74
IV.MC2.EHZ. 2020-11-04T20:53:34.81 0.3 undecidable manual S 53 4.8951 149 0.06 75
IV.MMO1.EHZ. 2020-11-04T20:53:34.89 0.1 undecidable manual P 84 15.1737 118 -0.03 98
IV.APEC.HHZ. 2020-11-04T20:53:33.50 3.0 undecidable manual P -2.1 0
IV.NRCA.HHZ. 2020-11-04T20:53:33.63 0.1 undecidable manual P 201 6.0939 143 0.14 98
IV.MC2.EHZ. 2020-11-04T20:53:33.40 0.1 undecidable manual P 53 4.8951 149 0.03 100
IV.CRTC.HHZ. 2020-11-04T20:53:31.98 3.0 undecidable manual P -3.64 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.2 0.0003186553 0.0896 AML other m 2020-11-04T20:53:35.31
IV.NRCA.HHN. ML:1.1 0.0002543315 0.0768 AML other m 2020-11-04T20:53:35.45
IV.NRCA.HNE. ML:1.2 0.00030937885 0.1024 AML other m 2020-11-04T20:53:35.32
IV.NRCA.HNN. ML:1.1 0.00022438105000000002 0.0768 AML other m 2020-11-04T20:53:35.46
IV.FDMO.HHE. ML:0.2 0.000013930796000000001 0.1152 AML other m 2020-11-04T20:53:38.75
IV.FDMO.HHN. ML:0.2 0.000017290319999999997 0.2688 AML other m 2020-11-04T20:53:39.01
IV.CSP1.EHE. ML:0.9 0.0000497035495 0.2944 AML other m 2020-11-04T20:53:41.85
IV.CSP1.EHN. ML:0.8 0.000039382125000000005 0.256 AML other m 2020-11-04T20:53:41.83
IV.GAVE.EHE. ML:0.5 0.000013529595 0.1792 AML other m 2020-11-04T20:53:43.88
IV.GAVE.EHN. ML:0.5 0.000015334 0.2176 AML other m 2020-11-04T20:53:43.97
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