Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 21-12-2019 and time 16:20:54 (UTC) in region 7 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.4 earthquake occured in region: 7 km SE Castelsantangelo sul Nera (MC), on

  • 21-12-2019 16:20:54 (UTC)
  • 21-12-2019 17:20:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8370, 13.1890 at 13 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 7 281 281
Norcia PG 9 4957 5238
Arquata del Tronto AP 11 1178 6416
Montegallo AP 12 523 6939
Ussita MC 13 444 7383
Preci PG 13 724 8107
Visso MC 13 1107 9214
Montemonaco AP 13 604 9818
Accumoli RI 16 667 10485
Montefortino FM 17 1178 11663
Bolognola MC 18 142 11805
Cascia PG 19 3217 15022
Acquasanta Terme AP 20 2916 17938

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
47 Km W of Teramo (54892 inhabitants)
54 Km NE of Terni (111501 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
94 Km W of Pescara (121014 inhabitants)
97 Km NW of Chieti (51815 inhabitants)
100 Km E of Viterbo (67173 inhabitants)
100 Km NE of Guidonia Montecelio (88673 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 1.4 2019-12-21
16:20:54		 42.8368 13.1893 13 2020-02-28
16:42:25		 Bollettino Sismico Italiano INGV 76572191
Reviewed
Rev100 		ML 1.5 2019-12-21
16:20:54		 42.8333 13.1998 14 2019-12-21
16:29:25		 Sala Sismica INGV-Roma 74859561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-21 16:20:54 ± 0.07
Latitude 42.8368 ± 0.0036
Longitude 13.1893 ± 0.0061
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76572191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 432
Semi-minor axis of confidence ellipse (meter) 263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 22
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 4.24390
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 74859561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-21 16:29:25

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 76572191
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-16 17:41:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAR1.HNZ. 2019-12-21T16:23:20.50 3.0 undecidable manual S 471.0729 3.313 0
IV.MCEL.HHZ. 2019-12-21T16:22:49.20 3.0 undecidable manual S 353.0799 2.727 0
IV.CAR1.HNZ. 2019-12-21T16:21:45.30 3.0 undecidable manual P 471.0729 -9.99 0
IV.CDRU.HHZ. 2019-12-21T16:21:42.44 3.0 undecidable manual Sn 3.38 0
IV.MCRV.HHZ. 2019-12-21T16:21:31.29 3.0 undecidable manual Sn -0.9 0
IV.CAFE.HHZ. 2019-12-21T16:21:29.47 3.0 undecidable manual Sn 0.11 0
IV.BULG.HHZ. 2019-12-21T16:21:24.26 3.0 undecidable manual P 355.977 -9.99 0
IV.MCEL.HHZ. 2019-12-21T16:21:22.11 3.0 undecidable manual P 353.0799 -9.99 0
IV.APRC.HHZ. 2019-12-21T16:21:12.23 3.0 undecidable manual P 227.2059 -9.99 0
IV.MF5.EHN. 2019-12-21T16:21:05.12 0.6 undecidable manual S 53 27.6501 96 0.65 42
IV.CESI.HHZ. 2019-12-21T16:21:05.27 0.3 undecidable manual S 309 29.748 96 0.24 70
IV.CSP1.EHZ. 2019-12-21T16:21:04.65 0.3 undecidable manual S 3 28.3494 96 -0.01 74
IV.LNSS.HNZ. 2019-12-21T16:21:04.98 0.3 undecidable manual S 205 28.6491 96 0.23 71
IT.MTCL.HGZ. 2019-12-21T16:21:03.20 0.3 undecidable manual S 319 23.2545 99 -0.12 73
IV.FDMO.HHZ. 2019-12-21T16:21:03.20 0.3 undecidable manual S 340 23.6541 99 -0.22 72
IV.SMA1.EHN. 2019-12-21T16:21:03.78 0.3 undecidable manual S 153 25.752 97 -0.2 71
IV.MMO1.EHZ. 2019-12-21T16:21:00.50 0.3 undecidable manual S 58 13.1757 119 -0.24 72
IV.GUMA.HNN. 2019-12-21T16:21:00.54 0.6 undecidable manual P 25 27.75 96 0.22 47
IV.CESI.HHZ. 2019-12-21T16:21:00.70 0.3 undecidable manual P 309 29.748 96 0.07 73
IV.MF5.EHN. 2019-12-21T16:21:00.56 0.3 undecidable manual P 53 27.6501 96 0.25 71
IV.CSP1.EHZ. 2019-12-21T16:21:00.36 0.1 undecidable manual P 3 28.3494 96 -0.05 98
IV.LNSS.HNZ. 2019-12-21T16:21:00.40 0.3 undecidable manual P 205 28.6491 96 -0.07 73
IV.SMA1.EHN. 2019-12-21T16:20:59.84 0.3 undecidable manual P 153 25.752 97 -0.19 71
IV.FDMO.HHZ. 2019-12-21T16:20:59.61 0.3 negative manual P 340 23.6541 99 -0.09 73
IV.MC2.EHZ. 2019-12-21T16:20:59.90 0.3 undecidable manual S 360 8.2806 137 0.18 73
IV.PTRJ.HNZ. 2019-12-21T16:20:59.00 3.0 undecidable manual P 197.0583 -9.99 0
IV.NRCA.HNZ. 2019-12-21T16:20:59.30 0.3 undecidable manual S 267 6.0939 147 -0.06 77
IT.MTCL.HGZ. 2019-12-21T16:20:59.55 0.1 undecidable manual P 319 23.2545 99 -0.09 98
IV.MMO1.EHZ. 2019-12-21T16:20:58.13 0.3 positive manual P 58 13.1757 119 -0.03 75
IV.NRCA.HNZ. 2019-12-21T16:20:57.47 0.1 undecidable manual P 267 6.0939 147 0.11 100
IV.MC2.EHZ. 2019-12-21T16:20:57.77 0.3 undecidable manual P 360 8.2806 137 0.21 73
IV.FEMA.HNE. 2019-12-21T16:20:57.84 0.6 undecidable manual P 321 17.9709 106 -1 37
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.2 0.000078039055 0.2592 AML other m 2019-12-21T16:21:25.22
IV.NRCA.HNE. ML:1.6 0.0005300374500000001 0.1024 AML other m 2019-12-21T16:20:59.91
IV.NRCA.HNN. ML:1.7 0.0007308451000000001 0.0896 AML other m 2019-12-21T16:21:00.08
IV.NRCA.HHN. ML:1.8 0.00077006425 0.0896 AML other m 2019-12-21T16:21:00.08
IV.FDMO.HHN. ML:1.1 0.000077178315 0.24 AML other m 2019-12-21T16:21:03.03
IV.CESI.HHN. ML:1.2 0.00006883903499999999 0.128 AML other m 2019-12-21T16:21:05.52
IV.FDMO.HHE. ML:0.8 0.000039381294999999995 0.2688 AML other m 2019-12-21T16:21:03.98
IV.NRCA.HHE. ML:1.6 0.0005811087999999999 0.0768 AML other m 2019-12-21T16:20:59.68
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