Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 23-12-2019 and time 08:41:07 (Italy) in region 6 km SE Castelsantangelo sul Nera (MC)

A magnitude ML 1.4 earthquake occured in region: 6 km SE Castelsantangelo sul Nera (MC), on

  • 23-12-2019 07:41:07 (UTC)
  • 23-12-2019 08:41:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8630, 13.2090 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
Montegallo AP 10 523 804
Montemonaco AP 11 604 1408
Ussita MC 11 444 1852
Norcia PG 12 4957 6809
Arquata del Tronto AP 12 1178 7987
Visso MC 12 1107 9094
Preci PG 14 724 9818
Montefortino FM 14 1178 10996
Bolognola MC 15 142 11138
Amandola FM 18 3629 14767
Accumoli RI 19 667 15434
Acquacanina MC 19 121 15555
Acquasanta Terme AP 19 2916 18471
Fiastra MC 20 559 19030
Comunanza AP 20 3166 22196

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km E of Foligno (57155 inhabitants)
46 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)
86 Km W of Montesilvano (53738 inhabitants)
88 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 1.4 2019-12-23
07:41:07		 42.8628 13.2087 7 2020-02-28
16:42:22		 Bollettino Sismico Italiano INGV 76243581
Reviewed
Rev100 		ML 1.5 2019-12-23
07:41:07		 42.8697 13.2283 9 2019-12-23
07:59:12		 Sala Sismica INGV-Roma 74911211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-23 07:41:07 ± 0.18
Latitude 42.8628 ± 0.0036
Longitude 13.2087 ± 0.0061
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76243581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 29
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.28778
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.0
Num. used stations 4
Type of magnitude ML
Reference to an origin 76243581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-05 14:47:00

ML:1.5

Field Value
Value 1.5
Uncertainty 0.0
Num. used stations 4
Type of magnitude ML
Reference to an origin 74911211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-23 07:59:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.BOSI.HHZ. 2019-12-23T07:43:03.30 3.0 undecidable manual Sg 13.99 0
IV.PLMA.HHZ. 2019-12-23T07:42:36.98 3.0 undecidable manual Sg 15.51 0
CR.STON.BHZ. 2019-12-23T07:42:34.26 3.0 undecidable manual Sn -2.94 0
IV.GIB.HHZ. 2019-12-23T07:42:34.21 3.0 negative manual Pg 14.18 0
IV.CRJA.HHZ. 2019-12-23T07:42:31.49 3.0 undecidable manual Pg 9.43 0
AC.VLO.HHZ. 2019-12-23T07:42:26.05 3.0 positive manual Pn 1.06 0
IV.MILZ.HHZ. 2019-12-23T07:42:20.70 3.0 undecidable manual Pn 1.6 0
IV.PETRA.HHZ. 2019-12-23T07:42:19.87 3.0 undecidable manual Pn -2.41 0
IV.MCIV.CHZ. 2019-12-23T07:41:43.42 3.0 undecidable manual S -0.01 0
IV.CIMA.HNZ. 2019-12-23T07:41:25.86 3.0 undecidable manual S 0.05 0
IV.PE3.EHZ. 2019-12-23T07:41:24.56 3.0 undecidable manual P -0.01 0
IT.RMVT.HGZ. 2019-12-23T07:41:24.14 3.0 undecidable manual P -2.74 0
IV.LNSS.HNE. 2019-12-23T07:41:19.37 0.6 undecidable manual S 205 31.9458 103 0.33 46
IV.CESI.HHZ. 2019-12-23T07:41:18.50 0.6 undecidable manual S 303 29.2485 104 0.35 46
IV.SMA1.EHN. 2019-12-23T07:41:17.57 0.6 undecidable manual S 158 27.75 105 -0.07 49
IV.GUMA.HNN. 2019-12-23T07:41:17.01 0.6 undecidable manual S 25 24.4533 107 0.49 45
IV.MF5.EHZ. 2019-12-23T07:41:17.41 0.6 undecidable manual S 56 24.6531 106 0.81 40
IV.CSP1.EHZ. 2019-12-23T07:41:16.70 0.6 undecidable manual S 359 25.3524 106 -0.14 49
IV.FDMO.HHZ. 2019-12-23T07:41:15.34 0.6 undecidable manual S 333 21.6672 109 -0.25 48
IV.LNSS.HNE. 2019-12-23T07:41:14.16 0.3 undecidable manual P 205 31.9458 103 -0.08 73
IV.MF5.EHZ. 2019-12-23T07:41:13.14 0.3 undecidable manual P 56 24.6531 106 0.31 70
IV.SMA1.EHN. 2019-12-23T07:41:13.13 0.6 undecidable manual P 158 27.75 105 -0.3 47
IV.CESI.HHZ. 2019-12-23T07:41:13.45 0.3 undecidable manual P 303 29.2485 104 -0.27 71
IV.FDMO.HHZ. 2019-12-23T07:41:12.04 0.3 undecidable manual P 333 21.6672 109 -0.21 72
IV.CSP1.EHZ. 2019-12-23T07:41:12.82 0.3 undecidable manual P 359 25.3524 106 -0.15 73
IV.GUMA.HNN. 2019-12-23T07:41:12.80 0.1 undecidable manual P 25 24.4533 107 0.02 100
IV.MMO1.EHZ. 2019-12-23T07:41:11.54 0.6 undecidable manual S 67 10.3785 125 -0.55 45
IV.NRCA.HHZ. 2019-12-23T07:41:11.69 0.6 undecidable manual S 247 8.2806 131 0.18 50
IV.NRCA.HHZ. 2019-12-23T07:41:10.04 0.1 positive manual P 247 8.2806 131 0.15 100
IV.MMO1.EHZ. 2019-12-23T07:41:09.99 0.1 undecidable manual P 67 10.3785 125 -0.23 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.4 0.0004639434 0.16 AML other m 2019-12-23T07:41:11.90
IV.NRCA.HHE. ML:1.5 0.0004862383 0.16 AML other m 2019-12-23T07:41:11.82
IV.NRCA.HNN. ML:1.4 0.00043108504999999996 0.1024 AML other m 2019-12-23T07:41:11.97
IV.NRCA.HHN. ML:1.4 0.00043209115 0.1024 AML other m 2019-12-23T07:41:11.97
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