Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 21-12-2019 and time 15:15:18 (UTC) in region 3 km W Castelsantangelo sul Nera (MC)

A magnitude ML 1.6 earthquake occured in region: 3 km W Castelsantangelo sul Nera (MC), on

  • 21-12-2019 15:15:18 (UTC)
  • 21-12-2019 16:15:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9020, 13.1180 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 3 281 281
Visso MC 4 1107 1388
Ussita MC 5 444 1832
Preci PG 7 724 2556
Norcia PG 12 4957 7513
Bolognola MC 14 142 7655
Monte Cavallo MC 14 145 7800
Acquacanina MC 15 121 7921
Fiordimonte MC 15 202 8123
Fiastra MC 15 559 8682
Sellano PG 16 1079 9761
Pieve Torina MC 17 1458 11219
Montemonaco AP 17 604 11823
Pievebovigliana MC 18 866 12689
Cerreto di Spoleto PG 19 1075 13764
Montegallo AP 19 523 14287
Montefortino FM 19 1178 15465

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
54 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
64 Km E of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
99 Km NE of Viterbo (67173 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 1.6 2019-12-21
15:15:18		 42.9022 13.1178 11 2020-02-28
16:42:25		 Bollettino Sismico Italiano INGV 76575041
Reviewed
Rev100 		ML 1.6 2019-12-21
15:15:18		 42.9043 13.1153 11 2019-12-21
15:26:03		 Sala Sismica INGV-Roma 74857681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-21 15:15:18 ± 0.05
Latitude 42.9022 ± 0.0027
Longitude 13.1178 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76575041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 370
Semi-minor axis of confidence ellipse (meter) 267
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 244
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 42
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.54679
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 76575041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-16 21:12:36

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 74857681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-21 15:26:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHN. 2019-12-21T15:15:33.40 0.3 undecidable manual S 170 44.3223 50 0.38 67
IV.LNSS.HHE. 2019-12-21T15:15:30.20 0.3 undecidable manual S 191 33.8439 50 -0.01 74
IV.SAP2.EHE. 2019-12-21T15:15:30.14 0.3 undecidable manual S 47 31.4463 50 0.57 65
IV.SMA1.EHN. 2019-12-21T15:15:30.30 0.3 undecidable manual S 149 34.9428 50 -0.21 71
IV.MF5.EHZ. 2019-12-21T15:15:29.60 0.3 undecidable manual S 71 29.3484 50 0.58 65
IV.MMUR.HNZ. 2019-12-21T15:15:29.61 0.6 undecidable manual P 351 60.6948 50 0.14 46
IV.GUMA.HNN. 2019-12-21T15:15:28.10 0.6 undecidable manual S 45 25.0527 50 0.22 48
IV.MML1.EHZ. 2019-12-21T15:15:28.10 0.3 undecidable manual S 333 26.2515 50 -0.1 74
IV.CESX.HHE. 2019-12-21T15:15:28.69 0.6 undecidable manual P 233 54.1014 50 0.23 46
IV.MTRA.EHE. 2019-12-21T15:15:28.24 0.3 undecidable manual S 125 27.8499 50 -0.38 69
IV.MOMA.HNZ. 2019-12-21T15:15:27.85 0.3 undecidable manual P 256 45.8208 50 0.67 61
IV.RM33.EHN. 2019-12-21T15:15:26.85 0.3 undecidable manual P 170 44.3223 50 -0.09 71
IV.CSP1.EHZ. 2019-12-21T15:15:26.80 0.3 undecidable manual S 19 22.1556 50 -0.31 71
IV.ASSB.HHN. 2019-12-21T15:15:26.27 0.3 undecidable manual P 293 40.4262 50 -0.07 72
IV.CESI.HHZ. 2019-12-21T15:15:26.60 0.6 undecidable manual S 303 20.7681 50 -0.12 49
IV.FIU1.HNZ. 2019-12-21T15:15:25.45 0.6 undecidable manual P 335 35.1426 50 -0.09 48
IV.SMA1.EHN. 2019-12-21T15:15:25.26 0.3 undecidable manual P 149 34.9428 50 -0.24 71
IV.LNSS.HHE. 2019-12-21T15:15:25.15 0.1 undecidable manual P 191 33.8439 50 -0.18 95
IV.T1299.HNN. 2019-12-21T15:15:25.19 0.6 undecidable manual P 156 32.6451 50 0.05 49
IV.MMO1.EHZ. 2019-12-21T15:15:25.35 0.3 undecidable manual S 91 16.9719 122 -0.28 72
IV.SAP2.EHE. 2019-12-21T15:15:24.48 0.6 undecidable manual P 47 31.4463 50 -0.48 45
IV.MF5.EHZ. 2019-12-21T15:15:24.90 0.3 undecidable manual P 71 29.3484 50 0.26 71
IT.MTCL.HGZ. 2019-12-21T15:15:24.60 0.3 undecidable manual S 317 13.9749 128 -0.18 74
IV.MTRA.EHE. 2019-12-21T15:15:24.25 0.3 undecidable manual P 125 27.8499 50 -0.16 73
IV.MML1.EHZ. 2019-12-21T15:15:24.04 0.1 undecidable manual P 333 26.2515 50 -0.13 98
IV.FDMO.HHZ. 2019-12-21T15:15:24.80 0.3 undecidable manual S 351 15.0738 125 -0.29 72
IV.GUMA.HNN. 2019-12-21T15:15:23.60 0.6 undecidable manual P 45 25.0527 50 -0.38 46
IV.CESI.HHZ. 2019-12-21T15:15:23.32 0.3 undecidable manual P 303 20.7681 50 0.01 76
IV.MC2.EHZ. 2019-12-21T15:15:23.10 0.3 undecidable manual S 80 5.8941 151 0.19 75
IV.FEMA.HNE. 2019-12-21T15:15:23.60 0.3 undecidable manual S 320 8.6802 141 0.16 75
IV.CSP1.EHZ. 2019-12-21T15:15:23.46 0.3 undecidable manual P 19 22.1556 50 -0.08 75
IV.NRCA.HNZ. 2019-12-21T15:15:23.10 0.3 undecidable manual S 182 7.5813 145 -0.13 76
IV.FDMO.HHZ. 2019-12-21T15:15:22.26 0.3 undecidable manual P 351 15.0738 125 -0.11 75
IT.MTCL.HGZ. 2019-12-21T15:15:22.20 0.3 undecidable manual P 317 13.9749 128 0.01 77
IV.MMO1.EHZ. 2019-12-21T15:15:22.59 0.1 negative manual P 91 16.9719 122 -0.09 100
IV.NRCA.HNZ. 2019-12-21T15:15:21.40 0.3 undecidable manual P 182 7.5813 145 0.1 76
IV.MC2.EHZ. 2019-12-21T15:15:21.40 0.1 undecidable manual P 80 5.8941 151 0.29 98
IV.FEMA.HNE. 2019-12-21T15:15:21.70 0.1 undecidable manual P 320 8.6802 141 0.28 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:0.0 0.0019595644999999997 0.128 AML other m 2019-12-21T15:15:23.24
IV.NRCA.HHN. ML:0.0 0.0019645649999999997 0.1152 AML other m 2019-12-21T15:15:23.24
IV.NRCA.HHE. ML:0.0 0.0011449880000000002 0.128 AML other m 2019-12-21T15:15:24.08
IV.NRCA.HNE. ML:0.0 0.0010852025 0.128 AML other m 2019-12-21T15:15:24.08
IV.FDMO.HHE. ML:0.0 0.00020324965 1.8208 AML other m 2019-12-21T15:15:24.05
IV.FDMO.HHN. ML:0.0 0.0001151456 0.1664 AML other m 2019-12-21T15:15:25.05
IV.CESI.HHE. ML:0.0 0.00020898175000000002 1.8976 AML other m 2019-12-21T15:15:27.95
IV.CESI.HNN. ML:0.0 0.00022079915 1.8848 AML other m 2019-12-21T15:15:27.01
IV.CESI.HNE. ML:0.0 0.000169198795 1.8976 AML other m 2019-12-21T15:15:27.96
IV.CESI.HHN. ML:0.0 0.00032660155 1.8208 AML other m 2019-12-21T15:15:27.94
IV.CSP1.EHE. ML:0.0 0.00014692387499999998 0.1024 AML other m 2019-12-21T15:15:27.11
IV.CSP1.EHN. ML:0.0 0.0001750852 0.1408 AML other m 2019-12-21T15:15:27.17
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