Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-12-2016 and time 19:22:41 (Italy) in region 8 km W Arquata del Tronto (AP)

A magnitude ML 1.5 earthquake occured in region: 8 km W Arquata del Tronto (AP), on

  • 21-12-2016 18:22:41 (UTC)
  • 21-12-2016 19:22:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7900, 13.2050 at 10 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
Arquata del Tronto AP 8 1178 1178
Norcia PG 9 4957 6135
Accumoli RI 11 667 6802
Montegallo AP 12 523 7325
Castelsantangelo sul Nera MC 13 281 7606
Montemonaco AP 16 604 8210
Preci PG 17 724 8934
Acquasanta Terme AP 17 2916 11850
Cascia PG 17 3217 15067
Ussita MC 18 444 15511
Visso MC 18 1107 16618
Amatrice RI 19 2657 19275
Cittareale RI 19 482 19757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
45 Km E of Foligno (57155 inhabitants)
51 Km NW of L'Aquila (69753 inhabitants)
52 Km E of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
93 Km NW of Chieti (51815 inhabitants)
96 Km S of Ancona (100861 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km NE of Tivoli (56533 inhabitants)
99 Km E 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
18:22:41		 42.7895 13.2047 10 2016-12-21
18:37:10		 Sala Sismica INGV-Roma 37350831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-12-21 18:22:41 ± 0.04
Latitude 42.7895 ± 0.0027
Longitude 13.2047 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 37350831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 312
Semi-minor axis of confidence ellipse (meter) 206
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54499
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 22
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 37350831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-12-21 18:37:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SACS.HHZ. 2016-12-21T18:23:15.76 3.0 undecidable manual S 0.17 0
IV.CSP1.EHZ. 2016-12-21T18:22:53.79 0.6 undecidable manual S 0 33.5442 50 0.11 48
IV.RM33.EHZ. 2016-12-21T18:22:53.00 0.6 undecidable manual S 179 31.1466 50 -0.04 48
IV.CAMP.HHZ. 2016-12-21T18:22:53.33 0.6 undecidable manual S 149 32.745 50 -0.13 47
IV.EL6.EHZ. 2016-12-21T18:22:52.97 0.1 undecidable manual P 352 60.495 50 0.1 92
IV.LNSS.HHZ. 2016-12-21T18:22:51.30 0.6 undecidable manual S 213 24.6531 111 0.17 47
IV.ASSB.HHZ. 2016-12-21T18:22:51.62 0.1 undecidable manual P 303 52.503 50 -0.03 93
IV.T1215.EHZ. 2016-12-21T18:22:51.64 0.6 undecidable manual S 273 27.3504 109 -0.38 46
IV.T1256.HHZ. 2016-12-21T18:22:51.00 0.6 undecidable manual S 4 24.1536 112 0.05 49
IV.SMA1.EHZ. 2016-12-21T18:22:50.02 0.6 undecidable manual S 149 20.5683 115 0.19 48
IV.T1243.HHZ. 2016-12-21T18:22:50.41 0.6 undecidable manual S 117 22.3554 113 0.01 49
IV.CESI.HHZ. 2016-12-21T18:22:49.01 0.3 positive manual P 315 34.1436 50 0.19 71
IV.T1241.EHZ. 2016-12-21T18:22:49.63 0.6 undecidable manual S 68 19.869 116 0.03 49
IV.T1216.EHZ. 2016-12-21T18:22:49.03 0.6 undecidable manual S 307 18.7701 117 -0.24 48
IV.TERO.HHZ. 2016-12-21T18:22:49.06 0.1 undecidable manual P 119 37.4292 50 -0.26 91
IV.T1247.HHZ. 2016-12-21T18:22:49.91 0.1 undecidable manual P 169 39.3273 50 0.29 92
IV.T1211.EHZ. 2016-12-21T18:22:49.72 0.1 undecidable manual P 225 40.3263 50 -0.04 95
IV.FDMO.HHZ. 2016-12-21T18:22:49.10 0.1 undecidable manual P 341 29.0487 50 1.08 70
IV.T1218.EHZ. 2016-12-21T18:22:48.57 0.6 undecidable manual S 209 15.1737 122 0.41 46
IV.RM33.EHZ. 2016-12-21T18:22:48.20 0.1 undecidable manual P 179 31.1466 50 -0.15 94
IV.CAMP.HHZ. 2016-12-21T18:22:48.42 0.1 undecidable manual P 149 32.745 50 -0.17 93
IV.CSP1.EHZ. 2016-12-21T18:22:48.57 0.1 undecidable manual P 0 33.5442 50 -0.15 93
IV.MMO1.EHZ. 2016-12-21T18:22:48.10 0.6 undecidable manual S 39 15.7731 121 -0.24 48
IV.GUMA.HHZ. 2016-12-21T18:22:48.64 0.1 undecidable manual P 19 32.1456 50 0.14 96
IV.MC2.EHZ. 2016-12-21T18:22:47.93 0.3 undecidable manual S 355 13.5753 125 0.21 72
IV.LNSS.HHZ. 2016-12-21T18:22:47.33 0.1 undecidable manual P 213 24.6531 111 0.08 97
IV.T1215.EHZ. 2016-12-21T18:22:47.46 0.1 undecidable manual P 273 27.3504 109 -0.3 93
IV.T1243.HHZ. 2016-12-21T18:22:46.69 0.1 undecidable manual P 117 22.3554 113 -0.14 97
IV.T1256.HHZ. 2016-12-21T18:22:46.95 0.1 undecidable manual P 4 24.1536 112 -0.19 95
IV.T1241.EHZ. 2016-12-21T18:22:46.44 0.1 undecidable manual P 68 19.869 116 0.07 98
IV.T1216.EHZ. 2016-12-21T18:22:46.01 0.1 undecidable manual P 307 18.7701 117 -0.17 97
IV.SMA1.EHZ. 2016-12-21T18:22:46.52 0.1 undecidable manual P 149 20.5683 115 0.02 99
IV.MMO1.EHZ. 2016-12-21T18:22:45.60 0.1 undecidable manual P 39 15.7731 121 -0.04 100
IV.T1245.HHZ. 2016-12-21T18:22:45.67 0.6 undecidable manual S 350 7.5813 142 -0.51 46
IV.T1218.EHZ. 2016-12-21T18:22:45.66 0.1 undecidable manual P 209 15.1737 122 0.12 98
IV.MC2.EHZ. 2016-12-21T18:22:45.45 0.1 undecidable manual P 355 13.5753 125 0.17 97
IV.T1245.HHZ. 2016-12-21T18:22:44.25 0.1 undecidable manual P 350 7.5813 142 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:1.4 0.00011310000000000001 0.16 AML other m 2016-12-21T18:22:54.56
IV.CESI.HHN. ML:1.6 0.00016399999999999997 0.34 AML other m 2016-12-21T18:22:56.53
IV.CSP1.EHE. ML:1.6 0.0001655 0.92 AML other m 2016-12-21T18:22:55.36
IV.CSP1.EHN. ML:1.5 0.00012585 0.32 AML other m 2016-12-21T18:22:55.50
IV.GUMA.HHE. ML:1.7 0.0002445 0.3 AML other m 2016-12-21T18:22:56.18
IV.GUMA.HHN. ML:1.9 0.00032499999999999993 0.72 AML other m 2016-12-21T18:22:57.08
IV.LNSS.HHN. ML:1.5 0.00020700000000000002 1.28 AML other m 2016-12-21T18:22:52.30
IV.LNSS.HHE. ML:1.6 0.00023099999999999998 0.96 AML other m 2016-12-21T18:22:52.92
IV.RM33.EHE. ML:1.6 0.00018099999999999998 0.26 AML other m 2016-12-21T18:22:53.85
IV.RM33.EHN. ML:1.6 0.00016299999999999998 0.12 AML other m 2016-12-21T18:22:54.14
IV.SMA1.EHN. ML:1.6 0.0002635 1.62 AML other m 2016-12-21T18:22:56.03
IV.SMA1.EHE. ML:1.5 0.0002375 1.38 AML other m 2016-12-21T18:22:53.07
IV.T1216.EHE. ML:1.6 0.00034199999999999996 0.48 AML other m 2016-12-21T18:22:52.44
IV.T1216.EHN. ML:1.6 0.0003215 0.68 AML other m 2016-12-21T18:22:51.54
IV.T1218.EHE. ML:1.5 0.00029000000000000006 0.48 AML other m 2016-12-21T18:22:49.71
IV.T1218.EHN. ML:1.6 0.000376 0.82 AML other m 2016-12-21T18:22:49.75
IV.T1241.EHE. ML:1.3 0.00016375 1.1 AML other m 2016-12-21T18:22:50.90
IV.T1241.EHN. ML:1.3 0.00016 1.1 AML other m 2016-12-21T18:22:50.40
IV.T1247.HHN. ML:1.7 0.000194 0.62 AML other m 2016-12-21T18:22:57.48
IV.T1247.HHE. ML:1.7 0.000164 0.12 AML other m 2016-12-21T18:22:58.54
IV.T1256.HHE. ML:1.3 0.000117 0.8 AML other m 2016-12-21T18:22:53.02
IV.T1256.HHN. ML:1.3 0.00012935000000000003 1.38 AML other m 2016-12-21T18:22:54.84
IV.TERO.HHN. ML:1.6 0.00014450000000000002 1.84 AML other m 2016-12-21T18:22:54.01
IV.TERO.HHE. ML:1.4 0.00008845 1.28 AML other m 2016-12-21T18:22:55.73
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