Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 02-04-2017 and time 15:12:21 (Italy) in region 4 km E Ussita (MC)

A magnitude ML 1.6 earthquake occured in region: 4 km E Ussita (MC), on

  • 02-04-2017 13:12:21 (UTC)
  • 02-04-2017 15:12:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9280, 13.1880 at 9 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
Ussita MC 4 444 444
Castelsantangelo sul Nera MC 5 281 725
Visso MC 8 1107 1832
Bolognola MC 8 142 1974
Acquacanina MC 12 121 2095
Montemonaco AP 12 604 2699
Fiastra MC 12 559 3258
Montefortino FM 13 1178 4436
Preci PG 13 724 5160
Fiordimonte MC 15 202 5362
Amandola FM 15 3629 8991
Montegallo AP 15 523 9514
Sarnano MC 15 3264 12778
Norcia PG 17 4957 17735
Monte Cavallo MC 17 145 17880
Pievebovigliana MC 17 866 18746
Pieve Torina MC 17 1458 20204
Comunanza AP 19 3166 23370
Arquata del Tronto AP 19 1178 24548
Gualdo MC 20 815 25363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
52 Km NW of Teramo (54892 inhabitants)
60 Km NE of Terni (111501 inhabitants)
66 Km N of L'Aquila (69753 inhabitants)
68 Km E of Perugia (166134 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
98 Km NW of Pescara (121014 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 1.6 2017-04-02
13:12:21		 42.9278 13.1882 9 2017-04-02
13:19:45		 Sala Sismica INGV-Roma 43290631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-02 13:12:21 ± 0.06
Latitude 42.9278 ± 0.0027
Longitude 13.1882 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 43290631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 404
Semi-minor axis of confidence ellipse (meter) 115
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 256
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.01619
Epicentral distance of station farthest from the epicenter (degree) 0.40649
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 43290631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-04-02 13:19:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2017-04-02T13:12:37.22 0.6 undecidable manual S 351 45.1215 50 0.83 38
IV.ASSB.HHZ. 2017-04-02T13:12:36.43 0.6 undecidable manual S 287 44.8218 50 0.11 48
IV.SNTG.HHZ. 2017-04-02T13:12:35.57 0.6 undecidable manual S 331 41.4252 50 0.14 47
IV.SMA1.EHZ. 2017-04-02T13:12:33.69 0.6 undecidable manual S 160 35.1426 50 -0.04 49
IV.T1218.EHZ. 2017-04-02T13:12:31.98 0.6 undecidable manual S 192 29.2485 107 -0.08 49
IV.T1212.EHZ. 2017-04-02T13:12:30.20 0.6 undecidable manual S 211 22.755 112 0.25 48
IV.CESI.HHE. 2017-04-02T13:12:30.53 0.3 undecidable manual S 290 24.5532 110 0 75
IV.T1214.EHZ. 2017-04-02T13:12:29.04 0.6 undecidable manual S 175 18.7701 116 0.37 47
IV.ASSB.HHZ. 2017-04-02T13:12:29.84 0.1 undecidable manual P 287 44.8218 50 -0.2 93
IV.GUMA.HHZ. 2017-04-02T13:12:29.21 0.6 undecidable manual S 39 19.1697 115 0.42 47
IV.T1220.EHZ. 2017-04-02T13:12:29.61 0.6 undecidable manual S 338 21.7671 113 -0.02 50
IV.SNTG.HHZ. 2017-04-02T13:12:29.18 0.6 positive manual P 331 41.4252 50 -0.34 46
IV.T1219.EHZ. 2017-04-02T13:12:29.13 0.6 undecidable manual S 314 20.5683 114 -0.12 50
IV.EL6.EHZ. 2017-04-02T13:12:29.73 0.6 negative manual P 351 45.1215 50 -0.35 45
IV.SMA1.EHZ. 2017-04-02T13:12:28.29 0.1 undecidable manual P 160 35.1426 50 -0.25 94
IV.T1218.EHZ. 2017-04-02T13:12:27.30 0.1 undecidable manual P 192 29.2485 107 -0.28 94
IV.FDMO.HHZ. 2017-04-02T13:12:27.16 0.6 undecidable manual S 326 14.5743 122 -0.24 49
IV.T1217.EHZ. 2017-04-02T13:12:27.98 0.6 negative manual P 221 31.8459 50 -0.05 49
IV.T1216.EHZ. 2017-04-02T13:12:27.58 0.6 undecidable manual S 253 14.3745 122 0.24 49
IV.NRCA.HHZ. 2017-04-02T13:12:26.75 0.3 undecidable manual S 210 12.0768 127 0.07 76
IV.T1212.EHZ. 2017-04-02T13:12:26.50 0.3 positive manual P 211 22.755 112 0.14 74
IV.FEMA.HNN. 2017-04-02T13:12:26.78 0.3 undecidable manual S 289 11.877 127 0.16 75
IV.CESI.HHE. 2017-04-02T13:12:26.64 0.1 undecidable manual P 290 24.5532 110 -0.05 100
IV.T1219.EHZ. 2017-04-02T13:12:25.79 0.6 negative manual P 314 20.5683 114 -0.16 49
IV.T1214.EHZ. 2017-04-02T13:12:25.87 0.6 positive manual P 175 18.7701 116 0.25 48
IV.GUMA.HHZ. 2017-04-02T13:12:25.93 0.1 negative manual P 39 19.1697 115 0.24 97
IV.T1245.HHZ. 2017-04-02T13:12:25.62 0.6 undecidable manual S 180 7.881 139 0 52
IV.T1220.EHZ. 2017-04-02T13:12:25.99 0.3 undecidable manual P 338 21.7671 113 -0.18 73
IV.NRCA.HHZ. 2017-04-02T13:12:24.61 0.1 positive manual P 210 12.0768 127 0.14 100
IV.FEMA.HNN. 2017-04-02T13:12:24.59 0.1 undecidable manual P 289 11.877 127 0.15 100
IV.FDMO.HHZ. 2017-04-02T13:12:24.73 0.1 negative manual P 326 14.5743 122 -0.15 99
IV.T1216.EHZ. 2017-04-02T13:12:24.98 0.3 positive manual P 253 14.3745 122 0.13 75
IV.T1245.HHZ. 2017-04-02T13:12:23.95 0.3 negative manual P 180 7.881 139 0.09 76
IV.MC2.EHZ. 2017-04-02T13:12:23.95 0.6 undecidable manual S 178 1.7982 169 -0.7 44
IV.MC2.EHZ. 2017-04-02T13:12:23.02 0.3 undecidable manual P 178 1.7982 169 -0.28 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:1.3 0.0000583 0.44 AML other m 2017-04-02T13:12:37.57
IV.ASSB.HHN. ML:1.2 0.00005155 1.1 AML other m 2017-04-02T13:12:38.07
IV.FDMO.HHN. ML:1.4 0.000229 0.56 AML other m 2017-04-02T13:12:27.53
IV.FDMO.HHE. ML:1.1 0.0001365 0.98 AML other m 2017-04-02T13:12:27.28
IV.GUMA.HHE. ML:1.8 0.00046249999999999997 0.32 AML other m 2017-04-02T13:12:29.41
IV.GUMA.HHN. ML:1.7 0.00038250000000000003 0.82 AML other m 2017-04-02T13:12:30.03
IV.NRCA.HHE. ML:1.7 0.00063 0.14 AML other m 2017-04-02T13:12:27.46
IV.NRCA.HHN. ML:1.7 0.000612 0.14 AML other m 2017-04-02T13:12:27.32
IV.T1212.EHE. ML:1.4 0.000168 0.28 AML other m 2017-04-02T13:12:30.23
IV.T1212.EHN. ML:1.3 0.000118 1.04 AML other m 2017-04-02T13:12:30.79
IV.T1245.HHN. ML:1.8 0.0009535 0.32 AML other m 2017-04-02T13:12:26.12
IV.T1245.HNN. ML:1.8 0.0009319999999999999 0.32 AML other m 2017-04-02T13:12:26.28
IV.T1245.HHE. ML:1.8 0.000989 1.76 AML other m 2017-04-02T13:12:26.09
IV.T1245.HNE. ML:1.9 0.001158 1.74 AML other m 2017-04-02T13:12:26.10
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