Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-12-2016 and time 19:09:25 (Italy) in region 4 km S Visso (MC)

A magnitude ML 1.5 earthquake occured in region: 4 km S Visso (MC), on

  • 21-12-2016 18:09:25 (UTC)
  • 21-12-2016 19:09:25 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9000, 13.1020 at 12 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
Visso MC 4 1107 1107
Castelsantangelo sul Nera MC 4 281 1388
Preci PG 6 724 2112
Ussita MC 6 444 2556
Norcia PG 12 4957 7513
Monte Cavallo MC 13 145 7658
Sellano PG 14 1079 8737
Bolognola MC 15 142 8879
Fiordimonte MC 15 202 9081
Acquacanina MC 16 121 9202
Fiastra MC 16 559 9761
Pieve Torina MC 17 1458 11219
Cerreto di Spoleto PG 18 1075 12294
Pievebovigliana MC 18 866 13160
Montemonaco AP 18 604 13764
Montegallo AP 20 523 14287

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
98 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
Reviewed
Rev100 		ML 1.5 2016-12-21
18:09:25		 42.8998 13.1023 12 2016-12-21
18:26:04		 Sala Sismica INGV-Roma 37350361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-21 18:09:25 ± 0.04
Latitude 42.8998 ± 0.0018
Longitude 13.1023 ± 0.0025
Depth (km) 12 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 37350361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 217
Semi-minor axis of confidence ellipse (meter) 76
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 225
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46045
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 37350361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-21 18:26:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2016-12-21T18:09:51.84 3.0 undecidable manual S -0.19 0
IV.APEC.HHZ. 2016-12-21T18:09:51.65 3.0 undecidable manual S -2.59 0
IV.ATCC.EHZ. 2016-12-21T18:09:41.35 0.3 undecidable manual S 310 49.0176 92 0.45 64
IV.TERO.HHZ. 2016-12-21T18:09:41.77 0.6 undecidable manual S 127 51.1155 92 0.32 43
IV.RM33.EHZ. 2016-12-21T18:09:39.37 0.3 undecidable manual S 168 44.3223 92 -0.26 68
IV.SNTG.HHZ. 2016-12-21T18:09:39.06 0.3 undecidable manual S 342 41.5251 93 0.17 69
IV.ASSB.HHZ. 2016-12-21T18:09:38.43 0.3 undecidable manual S 294 39.3273 93 0.13 69
IV.T1243.HHZ. 2016-12-21T18:09:37.70 0.3 undecidable manual S 129 36.0417 93 0.26 67
IV.LNSS.HHZ. 2016-12-21T18:09:36.81 0.3 undecidable manual S 189 33.3444 94 0.1 70
IV.T1241.EHZ. 2016-12-21T18:09:35.13 0.3 undecidable manual S 100 27.1506 95 0.07 71
IV.T1218.EHZ. 2016-12-21T18:09:34.61 0.1 undecidable manual S 178 25.5522 96 -0.02 97
IV.ATCC.EHZ. 2016-12-21T18:09:34.32 0.6 positive manual P 310 49.0176 92 0 47
IV.TERO.HHZ. 2016-12-21T18:09:34.44 0.6 negative manual P 127 51.1155 92 -0.2 45
IV.EL6.EHZ. 2016-12-21T18:09:34.11 3.0 negative manual P 0.02 0
IV.CESI.HHZ. 2016-12-21T18:09:33.10 0.3 undecidable manual S 306 19.869 100 -0.02 73
IV.SNTG.HHZ. 2016-12-21T18:09:33.03 1.0 undecidable manual P 342 41.5251 93 -0.13 23
IV.T1215.EHZ. 2016-12-21T18:09:33.56 0.3 undecidable manual S 240 21.867 98 -0.11 72
IV.RM33.EHZ. 2016-12-21T18:09:33.45 0.6 negative manual P 168 44.3223 92 -0.14 46
IV.CSP1.EHZ. 2016-12-21T18:09:33.79 0.3 undecidable manual S 21 22.8549 97 -0.13 71
IV.MMO1.EHZ. 2016-12-21T18:09:32.52 0.1 undecidable manual S 90 18.2706 102 -0.19 95
IV.ASSB.HHZ. 2016-12-21T18:09:32.63 0.3 undecidable manual P 294 39.3273 93 -0.2 68
IV.T1243.HHZ. 2016-12-21T18:09:32.11 1.0 undecidable manual P 129 36.0417 93 -0.22 23
IV.SMA1.EHZ. 2016-12-21T18:09:32.13 0.6 negative manual P 148 35.4423 93 -0.09 47
IV.T1256.HHZ. 2016-12-21T18:09:32.02 0.1 undecidable manual S 40 15.4734 109 0.02 99
IV.LNSS.HHZ. 2016-12-21T18:09:31.92 0.6 negative manual P 189 33.3444 94 0.02 47
IV.CSP1.EHZ. 2016-12-21T18:09:30.18 0.1 positive manual P 21 22.8549 97 -0.11 95
IV.MC2.EHZ. 2016-12-21T18:09:30.24 0.3 undecidable manual S 80 7.1928 141 0.07 75
IV.T1241.EHZ. 2016-12-21T18:09:30.59 1.0 undecidable manual P 100 27.1506 95 -0.36 23
IV.T1245.HHZ. 2016-12-21T18:09:30.54 0.3 undecidable manual S 125 8.4804 135 0.14 73
IV.T1218.EHZ. 2016-12-21T18:09:30.64 1.0 negative manual P 178 25.5522 96 -0.06 24
IV.T1215.EHZ. 2016-12-21T18:09:30.12 0.3 positive manual P 240 21.867 98 -0.03 73
IV.T1216.EHZ. 2016-12-21T18:09:29.93 0.3 undecidable manual S 261 6.8931 142 -0.18 72
IV.T1256.HHZ. 2016-12-21T18:09:29.14 1.0 undecidable manual P 40 15.4734 109 -0.04 24
IV.MMO1.EHZ. 2016-12-21T18:09:29.55 0.1 positive manual P 90 18.2706 102 -0.04 98
IV.CESI.HHZ. 2016-12-21T18:09:29.83 0.1 negative manual P 306 19.869 100 0 98
IV.T1216.EHZ. 2016-12-21T18:09:28.13 0.1 positive manual P 261 6.8931 142 0.03 100
IV.MC2.EHZ. 2016-12-21T18:09:28.28 0.1 positive manual P 80 7.1928 141 0.16 98
IV.T1245.HHZ. 2016-12-21T18:09:28.35 0.6 undecidable manual P 125 8.4804 135 0.09 49
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.4 0.00009055597 0.192 AML other m 2016-12-21T18:09:38.78
IV.ASSB.HHN. ML:1.5 0.00010450023 1.8816 AML other m 2016-12-21T18:09:40.48
IV.ATCC.EHN. ML:1.3 0.000048384099999999996 3.0208 AML other m 2016-12-21T18:09:43.04
IV.ATCC.EHE. ML:1.5 0.00009031022499999999 2.4192 AML other m 2016-12-21T18:09:43.25
IV.CESI.HHE. ML:1.5 0.00020800000000000001 0.6 AML other m 2016-12-21T18:09:33.14
IV.CESI.HHN. ML:1.8 0.00044050000000000003 0.1 AML other m 2016-12-21T18:09:33.32
IV.CSP1.EHN. ML:1.4 0.00016137280000000001 3.1616 AML other m 2016-12-21T18:09:33.81
IV.CSP1.EHE. ML:1.4 0.0001483633 1.7152 AML other m 2016-12-21T18:09:34.01
IV.LNSS.HHN. ML:1.6 0.000164 0.42 AML other m 2016-12-21T18:09:37.14
IV.LNSS.HHE. ML:1.4 0.00010339999999999999 1.04 AML other m 2016-12-21T18:09:37.01
IV.SNTG.HHN. ML:1.2 0.00005005 0.46 AML other m 2016-12-21T18:09:41.71
IV.SNTG.HHE. ML:1.2 0.000053649999999999996 1.58 AML other m 2016-12-21T18:09:50.91
IV.SNTG.HNN. ML:1.7 0.00017198125 3.4048 AML other m 2016-12-21T18:09:40.57
IV.SNTG.HNE. ML:1.6 0.00013598975 2.7648 AML other m 2016-12-21T18:09:39.22
IV.T1216.EHE. ML:1.5 0.0003745 0.22 AML other m 2016-12-21T18:09:30.51
IV.T1216.EHN. ML:1.6 0.0005095000000000001 1.66 AML other m 2016-12-21T18:09:29.16
IV.T1218.HNE. ML:1.5 0.00018034119999999997 0.8704 AML other m 2016-12-21T18:09:35.63
IV.T1218.EHN. ML:1.6 0.0002120095 0.8448 AML other m 2016-12-21T18:09:35.25
IV.T1218.EHE. ML:1.4 0.000154442 0.8704 AML other m 2016-12-21T18:09:35.19
IV.T1218.HNN. ML:1.6 0.000208087 0.832 AML other m 2016-12-21T18:09:35.67
IV.T1241.EHE. ML:1.5 0.0001618 0.64 AML other m 2016-12-21T18:09:35.32
IV.T1241.EHN. ML:1.7 0.0002595 0.16 AML other m 2016-12-21T18:09:35.24
IV.T1241.HNE. ML:1.6 0.00018439655 5.1328 AML other m 2016-12-21T18:09:35.31
IV.T1256.HHN. ML:1.2 0.0001304 0.32 AML other m 2016-12-21T18:09:33.75
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