Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-12-2016 and time 21:31:34 (Italy) in region 7 km E Castelsantangelo sul Nera (MC)

A magnitude ML 1.5 earthquake occured in region: 7 km E Castelsantangelo sul Nera (MC), on

  • 21-12-2016 20:31:34 (UTC)
  • 21-12-2016 21:31:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8850, 13.2400 at 17 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Montemonaco AP 7 604 885
Montegallo AP 9 523 1408
Montefortino FM 11 1178 2586
Ussita MC 11 444 3030
Bolognola MC 12 142 3172
Arquata del Tronto AP 13 1178 4350
Visso MC 13 1107 5457
Amandola FM 14 3629 9086
Norcia PG 16 4957 14043
Preci PG 16 724 14767
Comunanza AP 17 3166 17933
Acquacanina MC 17 121 18054
Sarnano MC 18 3264 21318
Palmiano AP 18 196 21514
Fiastra MC 18 559 22073
Acquasanta Terme AP 19 2916 24989
Roccafluvione AP 19 2010 26999

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km E of Foligno (57155 inhabitants)
46 Km NW of Teramo (54892 inhabitants)
60 Km NE of Terni (111501 inhabitants)
61 Km N of L'Aquila (69753 inhabitants)
74 Km E of Perugia (166134 inhabitants)
85 Km S of Ancona (100861 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
92 Km NW of Pescara (121014 inhabitants)
96 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
Reviewed
Rev100 		ML 1.5 2016-12-21
20:31:34		 42.8847 13.2395 17 2016-12-21
20:35:38		 Sala Sismica INGV-Roma 37356101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-21 20:31:34 ± 0.09
Latitude 42.8847 ± 0.0045
Longitude 13.2395 ± 0.0074
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 37356101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 579
Semi-minor axis of confidence ellipse (meter) 263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 247
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 26
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) 0.37592
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 37356101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-21 20:35:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2016-12-21T20:32:01.66 3.0 undecidable manual S 0.35 0
IV.RM33.EHZ. 2016-12-21T20:31:49.57 0.6 undecidable manual S 183 41.7249 101 0.94 36
IV.TERO.HHZ. 2016-12-21T20:31:48.51 0.6 undecidable manual S 134 41.5251 101 -0.07 47
IV.SMA1.EHZ. 2016-12-21T20:31:45.10 0.6 undecidable manual S 165 29.2485 108 -0.3 45
IV.ASSB.HHZ. 2016-12-21T20:31:44.76 3.0 undecidable manual P 0.35 0
IV.GUMA.HHZ. 2016-12-21T20:31:44.05 0.6 undecidable manual S 21 21.2676 117 0.64 41
IV.EL6.EHZ. 2016-12-21T20:31:44.15 3.0 negative manual P -0.32 0
IV.T1218.EHZ. 2016-12-21T20:31:44.65 0.6 undecidable manual S 203 25.8519 111 0.1 48
IV.T1243.HHZ. 2016-12-21T20:31:44.72 0.6 undecidable manual S 141 26.9508 110 -0.09 48
IV.FDMO.HHZ. 2016-12-21T20:31:43.02 0.6 undecidable manual S 324 20.868 118 -0.31 46
IV.RM33.EHZ. 2016-12-21T20:31:43.39 0.3 undecidable manual P 183 41.7249 101 0.57 63
IV.SNTG.HHZ. 2016-12-21T20:31:43.61 3.0 positive manual P -0.41 0
IV.TERO.HHZ. 2016-12-21T20:31:42.55 0.1 undecidable manual P 134 41.5251 101 -0.25 90
IV.T1241.EHZ. 2016-12-21T20:31:42.15 0.6 undecidable manual S 101 15.873 127 -0.06 49
IV.T1216.EHZ. 2016-12-21T20:31:42.54 0.6 undecidable manual S 272 17.9709 123 -0.11 48
IV.T1256.HHZ. 2016-12-21T20:31:41.66 0.6 undecidable manual S 355 13.5753 133 -0.07 49
IV.T1215.EHZ. 2016-12-21T20:31:41.42 3.0 undecidable manual P 0.07 0
IV.MC2.EHZ. 2016-12-21T20:31:40.68 0.6 undecidable manual S 306 5.0949 160 0.22 48
IV.T1243.HHZ. 2016-12-21T20:31:40.43 0.1 undecidable manual P 141 26.9508 110 -0.19 93
IV.SMA1.EHZ. 2016-12-21T20:31:40.82 0.6 undecidable manual P 165 29.2485 108 -0.14 47
IV.MMO1.EHZ. 2016-12-21T20:31:40.55 0.3 undecidable manual S 77 7.2927 152 -0.15 73
IV.GUMA.HHZ. 2016-12-21T20:31:40.06 0.1 positive manual P 21 21.2676 117 0.25 92
IV.T1245.HHZ. 2016-12-21T20:31:40.64 0.6 undecidable manual S 233 5.1948 159 0.17 49
IV.T1218.EHZ. 2016-12-21T20:31:40.39 0.1 undecidable manual P 203 25.8519 111 -0.08 95
IV.T1216.EHZ. 2016-12-21T20:31:39.28 0.3 undecidable manual P 272 17.9709 123 -0.09 72
IV.FDMO.HHZ. 2016-12-21T20:31:39.57 0.1 undecidable manual P 324 20.868 118 -0.19 94
IV.T1241.EHZ. 2016-12-21T20:31:39.02 0.1 undecidable manual P 101 15.873 127 -0.09 98
IV.T1245.HHZ. 2016-12-21T20:31:38.16 0.1 negative manual P 233 5.1948 159 0.04 100
IV.MC2.EHZ. 2016-12-21T20:31:38.20 0.1 undecidable manual P 306 5.0949 160 0.1 99
IV.T1256.HHZ. 2016-12-21T20:31:38.80 0.1 undecidable manual P 355 13.5753 133 -0.04 99
IV.MMO1.EHZ. 2016-12-21T20:31:38.18 0.1 undecidable manual P 77 7.2927 152 -0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUMA.HHE. ML:1.8 0.000347 0.26 AML other m 2016-12-21T20:31:44.27
IV.GUMA.HHN. ML:1.6 0.00023799999999999998 0.3 AML other m 2016-12-21T20:31:46.95
IV.RM33.EHN. ML:1.4 0.00008629999999999998 0.28 AML other m 2016-12-21T20:31:49.94
IV.RM33.EHE. ML:1.5 0.0000932 0.26 AML other m 2016-12-21T20:31:50.65
IV.SMA1.EHN. ML:1.4 0.0001056 0.46 AML other m 2016-12-21T20:31:46.46
IV.SMA1.EHE. ML:1.3 0.00009175 0.38 AML other m 2016-12-21T20:31:45.56
IV.T1245.HHE. ML:1.7 0.0005895000000000001 0.2 AML other m 2016-12-21T20:31:41.10
IV.T1245.HHN. ML:1.6 0.00041400000000000003 1.42 AML other m 2016-12-21T20:31:41.03
IV.T1256.HHE. ML:1.4 0.0002 0.16 AML other m 2016-12-21T20:31:41.81
IV.T1256.HHN. ML:1.6 0.0002875 1.2 AML other m 2016-12-21T20:31:42.11
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