Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 18-12-2021 and time 03:10:09 (Italy) 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

  • 18-12-2021 02:10:09 (UTC)
  • 18-12-2021 03:10:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8700, 13.2220 at 7 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 6 281 281
Montemonaco AP 9 604 885
Montegallo AP 10 523 1408
Ussita MC 11 444 1852
Arquata del Tronto AP 12 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
Accumoli RI 19 667 22196
Palmiano AP 20 196 22392
Sarnano MC 20 3264 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)
59 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
Bulletin
Rev1000 		ML 0.8 2021-12-18
02:10:09		 42.8695 13.2223 7 2022-03-30
13:04:23		 Bollettino Sismico Italiano INGV 98788981
Reviewed
Rev100 		ML 0.8 2021-12-18
02:10:09		 42.8687 13.225 7 2021-12-18
02:20:38		 Sala Sismica INGV-Roma 98636581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-18 02:10:09 ± 0.09
Latitude 42.8695 ± 0.0018
Longitude 13.2223 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98788981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 310
Semi-minor axis of confidence ellipse (meter) 46
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36063
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 98788981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-21 13:27:23

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 98636581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-18 02:20:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2021-12-18T02:11:48.84 3.0 undecidable manual Pg 12.05 0
IV.CMPR.HNZ. 2021-12-18T02:11:37.36 3.0 undecidable manual Sn 1.09 0
IV.MCRV.HHZ. 2021-12-18T02:11:31.80 3.0 undecidable manual Sg 6.44 0
IV.MUCR.HHZ. 2021-12-18T02:11:22.05 3.0 undecidable manual Pn -3.92 0
IV.PTRJ.HHZ. 2021-12-18T02:11:09.41 3.0 undecidable manual Sg 2.4 0
IT.GLNS.HNZ. 2021-12-18T02:11:01.67 3.0 undecidable manual S -0.21 0
IX.SNR3.EHZ.02 2021-12-18T02:10:59.78 3.0 undecidable manual Pg 6.64 0
IV.MCRV.HHZ. 2021-12-18T02:10:57.99 3.0 undecidable manual Pg 5.53 0
IV.PAOL.HHZ. 2021-12-18T02:10:48.29 3.0 undecidable manual Pg 2 0
IV.LAV9.HHZ. 2021-12-18T02:10:48.48 3.0 undecidable manual S -5.55 0
IT.GLNS.HNZ. 2021-12-18T02:10:41.34 3.0 undecidable manual P 2.07 0
IV.VCEL.EHZ. 2021-12-18T02:10:32.23 3.0 undecidable manual S -2.93 0
IV.VVLD.HHZ. 2021-12-18T02:10:31.43 3.0 undecidable manual P 0.07 0
IV.RM33.HNE. 2021-12-18T02:10:23.95 0.3 undecidable manual S 181 40.0266 50 0.36 68
IV.LNSS.HNZ. 2021-12-18T02:10:21.14 0.3 undecidable manual S 207 33.0447 102 -0.22 70
IV.MML1.EHZ. 2021-12-18T02:10:21.76 0.6 undecidable manual S 323 33.8439 102 0.15 47
IV.CESI.HHZ. 2021-12-18T02:10:20.52 0.3 undecidable manual S 300 29.8479 104 0.26 69
IV.PF6.EHN. 2021-12-18T02:10:20.25 0.3 undecidable manual S 356 29.8479 104 -0.01 72
IV.SMA1.EHN. 2021-12-18T02:10:19.60 0.3 undecidable manual S 161 28.0497 104 -0.06 73
IV.GUMA.HNN. 2021-12-18T02:10:18.46 0.3 undecidable manual S 23 23.2545 107 0.39 68
IV.CSP1.EHZ. 2021-12-18T02:10:18.66 0.3 undecidable manual S 357 24.6531 106 0.13 72
IV.MF5.EHZ. 2021-12-18T02:10:18.36 0.3 undecidable manual S 56 23.3544 107 0.29 70
IV.FDMO.HHZ. 2021-12-18T02:10:17.66 0.6 undecidable manual S 329 21.5673 109 0.18 48
IV.CAMP.HHE. 2021-12-18T02:10:17.99 0.3 undecidable manual P 158 40.0266 50 0.31 68
IV.RM33.HNE. 2021-12-18T02:10:17.98 0.3 undecidable manual P 181 40.0266 50 0.3 68
IV.GAVE.EHZ. 2021-12-18T02:10:16.79 0.3 undecidable manual P 234 33.1446 102 0.39 67
IV.LNSS.HNZ. 2021-12-18T02:10:16.28 0.3 undecidable manual P 207 33.0447 102 -0.11 71
IV.MTRA.EHE. 2021-12-18T02:10:16.85 0.3 undecidable manual S 131 18.87 111 0.22 70
IV.MML1.EHZ. 2021-12-18T02:10:16.15 0.3 undecidable manual P 323 33.8439 102 -0.39 66
IV.CESI.HHZ. 2021-12-18T02:10:15.52 0.3 undecidable manual P 300 29.8479 104 -0.24 69
IV.PF6.EHN. 2021-12-18T02:10:15.93 0.3 undecidable manual P 356 29.8479 104 0.17 71
IV.CSP1.EHZ. 2021-12-18T02:10:14.49 0.3 undecidable manual P 357 24.6531 106 -0.27 69
IV.SMA1.EHN. 2021-12-18T02:10:14.94 0.6 undecidable manual P 161 28.0497 104 -0.47 44
IV.MF5.EHZ. 2021-12-18T02:10:14.62 0.3 undecidable manual P 56 23.3544 107 0.13 72
IV.GUMA.HNN. 2021-12-18T02:10:14.19 0.1 undecidable manual P 23 23.2545 107 -0.3 92
IV.NRCA.HHZ. 2021-12-18T02:10:13.91 0.3 undecidable manual S 246 9.6792 127 0.13 72
IV.FDMO.HHZ. 2021-12-18T02:10:13.92 0.3 undecidable manual P 329 21.5673 109 -0.23 70
IV.MMO1.EHZ. 2021-12-18T02:10:13.39 0.3 undecidable manual S 69 9.0798 128 -0.25 73
IV.MTRA.EHE. 2021-12-18T02:10:13.43 0.3 undecidable manual P 131 18.87 111 -0.23 71
IV.MC2.EHZ. 2021-12-18T02:10:12.76 0.3 undecidable manual S 330 5.3946 143 0.03 73
IV.MMO1.EHZ. 2021-12-18T02:10:11.77 0.3 undecidable manual P 69 9.0798 128 -0.16 74
IV.MC2.EHZ. 2021-12-18T02:10:11.21 0.3 undecidable manual P 330 5.3946 143 -0.2 74
IV.NRCA.HHZ. 2021-12-18T02:10:11.94 0.1 positive manual P 246 9.6792 127 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MMO1.EHN. ML:0.8 0.00010476640000000001 0.1008 AML other m 2021-12-18T02:10:13.47
IV.MMO1.EHE. ML:0.8 0.000098216695 0.2784 AML other m 2021-12-18T02:10:13.82
IV.FDMO.HHE. ML:0.6 0.000029199615 1.8208 AML other m 2021-12-18T02:10:18.71
IV.FDMO.HHN. ML:0.4 0.000021615565 1.2192 AML other m 2021-12-18T02:10:17.93
IV.CSP1.EHE. ML:0.9 0.000046757560000000005 3.9008 AML other m 2021-12-18T02:10:17.63
IV.CSP1.EHN. ML:1.1 0.00007779508 2.4192 AML other m 2021-12-18T02:10:19.29
IV.CESI.HHN. ML:1.0 0.00004876057 1.2 AML other m 2021-12-18T02:10:20.88
IV.CESI.HHE. ML:0.7 0.000027023865 3.16 AML other m 2021-12-18T02:10:21.85
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