Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 04-01-2021 and time 16:08:01 (Italy) in region 5 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 0.8 earthquake occured in region: 5 km SE Castelsantangelo sul Nera (MC), on

  • 04-01-2021 15:08:01 (UTC)
  • 04-01-2021 16:08:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8660, 13.2040 at 11 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.

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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 5 281 281
Ussita MC 10 444 725
Montemonaco AP 11 604 1329
Montegallo AP 11 523 1852
Visso MC 12 1107 2959
Norcia PG 12 4957 7916
Arquata del Tronto AP 13 1178 9094
Preci PG 14 724 9818
Montefortino FM 14 1178 10996
Bolognola MC 15 142 11138
Amandola FM 18 3629 14767
Acquacanina MC 19 121 14888
Accumoli RI 19 667 15555
Fiastra MC 19 559 16114
Acquasanta Terme AP 20 2916 19030

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
57 Km NE of Terni (111501 inhabitants)
59 Km N of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
94 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
Bulletin
Rev1000 		ML 0.8 2021-01-04
15:08:01		 42.8662 13.2043 11 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86395781
Reviewed
Rev100 		ML 1.1 2021-01-04
15:08:01		 42.8625 13.2013 11 2021-01-04
15:12:19		 Sala Sismica INGV-Roma 86015481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-04 15:08:01 ± 0.04
Latitude 42.8662 ± 0.0018
Longitude 13.2043 ± 0.0025
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86395781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 239
Semi-minor axis of confidence ellipse (meter) 36
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 54
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.46855
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 86395781
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-20 09:21:36

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 86015481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-04 15:12:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LNSS.HNZ. 2021-01-04T15:08:12.19 0.6 undecidable manual S 205 32.1456 90 0.14 47
IV.GAVE.EHN. 2021-01-04T15:08:12.01 0.6 undecidable manual S 233 31.746 90 0.05 48
IV.MML1.HNE. 2021-01-04T15:08:12.40 0.6 undecidable manual S 326 33.3444 90 0.02 49
IV.PF6.EHN. 2021-01-04T15:08:11.48 0.3 undecidable manual S 358 30.1476 91 -0.05 72
IV.CESI.HHZ. 2021-01-04T15:08:11.25 0.6 undecidable manual S 302 28.8489 91 0.08 48
IV.CSP1.EHZ. 2021-01-04T15:08:10.05 0.6 undecidable manual S 0 25.0527 91 -0.12 48
IV.MOMA.HNZ. 2021-01-04T15:08:10.70 0.6 undecidable manual P 263 52.0035 90 0.23 45
IV.FDMO.HHZ. 2021-01-04T15:08:09.00 0.3 undecidable manual S 333 21.1677 91 -0.13 72
IV.MTRA.EHZ. 2021-01-04T15:08:08.69 0.3 undecidable manual S 128 19.7691 91 -0.08 74
IV.SAP2.EHE. 2021-01-04T15:08:07.03 0.6 undecidable manual P 32 30.0477 91 -0.05 48
IV.MML1.HNE. 2021-01-04T15:08:07.57 0.1 undecidable manual P 326 33.3444 90 -0.01 97
IV.FEMA.HNZ. 2021-01-04T15:08:07.73 0.6 undecidable manual S 310 16.4724 93 -0.15 49
IV.LNSS.HNZ. 2021-01-04T15:08:07.50 0.1 undecidable manual P 205 32.1456 90 0.1 95
IV.PF6.EHN. 2021-01-04T15:08:07.02 0.1 undecidable manual P 358 30.1476 91 -0.08 96
IV.GAVE.EHN. 2021-01-04T15:08:07.56 0.6 undecidable manual P 233 31.746 90 0.22 46
IV.CESI.HHZ. 2021-01-04T15:08:06.95 0.1 undecidable manual P 302 28.8489 91 0.06 97
IV.MF5.EHZ. 2021-01-04T15:08:06.54 0.6 undecidable manual P 57 24.753 91 0.28 47
IV.T1299.EHZ. 2021-01-04T15:08:06.16 0.1 undecidable manual P 166 26.4513 91 -0.37 92
IV.MMO1.EHZ. 2021-01-04T15:08:06.28 0.3 undecidable manual S 70 10.5783 118 -0.09 74
IV.CSP1.EHZ. 2021-01-04T15:08:06.26 0.3 undecidable manual P 0 25.0527 91 -0.04 73
IV.MC2.EHZ. 2021-01-04T15:08:05.37 0.3 undecidable manual S 346 5.1948 147 0.06 77
IV.MTRA.EHZ. 2021-01-04T15:08:05.44 0.1 undecidable manual P 128 19.7691 91 -0.05 99
IV.NRCA.HHZ. 2021-01-04T15:08:05.49 0.3 undecidable manual S 244 8.1807 130 -0.34 71
IV.FDMO.HHZ. 2021-01-04T15:08:05.71 0.6 undecidable manual P 333 21.1677 91 0 50
IV.FEMA.HNZ. 2021-01-04T15:08:05.01 0.1 undecidable manual P 310 16.4724 93 0.03 100
IV.MMO1.EHZ. 2021-01-04T15:08:04.27 0.1 undecidable manual P 70 10.5783 118 0.16 98
IV.MC2.EHZ. 2021-01-04T15:08:03.69 0.1 undecidable manual P 346 5.1948 147 0.19 99
IV.NRCA.HHZ. 2021-01-04T15:08:03.88 0.1 undecidable manual P 244 8.1807 130 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:1.2 0.00011754027000000001 0.4736 AML other m 2021-01-04T15:08:06.44
IV.MTRA.HNE. ML:1.2 0.000111979 0.6272 AML other m 2021-01-04T15:08:07.49
IV.MTRA.EHN. ML:0.7 0.00004240623 0.256 AML other m 2021-01-04T15:08:08.83
IV.MTRA.EHE. ML:0.6 0.00003116106 0.0768 AML other m 2021-01-04T15:08:09.06
IV.FDMO.HHN. ML:0.6 0.000028655945 0.1792 AML other m 2021-01-04T15:08:09.28
IV.FDMO.HHE. ML:0.5 0.00002018965 0.1408 AML other m 2021-01-04T15:08:09.22
IV.CSP1.EHE. ML:1.0 0.000055811349999999995 1.2064 AML other m 2021-01-04T15:08:10.64
IV.CSP1.EHN. ML:0.8 0.000042036990000000004 1.296 AML other m 2021-01-04T15:08:15.85
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