Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 20-01-2017 and time 04:47:03 (UTC) in region 2 km S Amatrice (RI)

A magnitude ML 1.7 earthquake occured in region: 2 km S Amatrice (RI), on

  • 20-01-2017 04:47:03 (UTC)
  • 20-01-2017 05:47:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6120, 13.2850 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
Amatrice RI 2 2657 2657
Campotosto AQ 9 542 3199
Accumoli RI 10 667 3866
Capitignano AQ 10 665 4531
Montereale AQ 10 2581 7112
Cittareale RI 10 482 7594
Borbona RI 17 617 8211
Crognaleto TE 17 1297 9508
Cagnano Amiterno AQ 18 1369 10877
Barete AQ 18 737 11614
Arquata del Tronto AP 18 1178 12792
Posta RI 18 694 13486
Cortino TE 18 656 14142
Pizzoli AQ 19 4326 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of L'Aquila (69753 inhabitants)
35 Km W of Teramo (54892 inhabitants)
53 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
78 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
92 Km SE of Perugia (166134 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 1.7 2017-01-20
04:47:03		 42.6115 13.2852 10 2017-01-20
05:04:11		 Sala Sismica INGV-Roma 39366691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-01-20 04:47:03 ± 0.1
Latitude 42.6115 ± 0.0072
Longitude 13.2852 ± 0.0073
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 39366691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 849
Semi-minor axis of confidence ellipse (meter) 443
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.55938
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 39366691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-01-20 05:04:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1215.EHZ. 2017-01-20T04:47:16.26 0.1 undecidable manual S 302 40.0266 50 -0.23 91
IV.MOMA.HHZ. 2017-01-20T04:47:14.51 0.6 positive manual P 290 62.0934 50 0.25 44
IV.T1220.EHZ. 2017-01-20T04:47:13.66 0.6 negative manual P 344 57.5979 50 0.1 45
IV.ARRO.EHZ. 2017-01-20T04:47:11.33 0.6 negative manual P 265 42.5241 50 0.08 47
IV.LNSS.HHZ. 2017-01-20T04:47:10.89 0.1 undecidable manual S 267 19.9689 117 -0.04 98
IV.T1215.EHZ. 2017-01-20T04:47:10.64 0.1 undecidable manual P 302 40.0266 50 -0.21 92
IV.CAMP.HHZ. 2017-01-20T04:47:08.74 0.1 undecidable manual S 130 13.1757 128 -0.17 97
IV.T1202.EHZ. 2017-01-20T04:47:08.68 0.1 undecidable manual S 334 11.3775 132 0.26 95
IV.LNSS.HHZ. 2017-01-20T04:47:07.83 0.1 undecidable manual P 267 19.9689 117 0.19 95
IV.T1202.EHZ. 2017-01-20T04:47:06.23 0.1 undecidable manual P 334 11.3775 132 0.04 100
IV.T1299.EHZ. 2017-01-20T04:47:06.33 0.1 undecidable manual S 355 2.4975 166 -0.44 93
IV.CAMP.HHZ. 2017-01-20T04:47:06.75 0.1 undecidable manual P 130 13.1757 128 0.28 95
IV.T1299.EHZ. 2017-01-20T04:47:05.34 0.1 undecidable manual P 355 2.4975 166 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHN. ML:1.0 0.00011024999999999998 0.4 AML other m 2017-01-20T04:47:09.30
IV.CAMP.HHE. ML:1.3 0.00019350000000000001 0.6 AML other m 2017-01-20T04:47:09.53
IV.MOMA.HHE. ML:1.6 0.0000699 1.08 AML other m 2017-01-20T04:47:24.05
IV.MOMA.HHN. ML:1.4 0.00005205 0.42 AML other m 2017-01-20T04:47:24.73
IV.T1202.EHE. ML:2.1 0.001515 0.28 AML other m 2017-01-20T04:47:09.63
IV.T1202.EHN. ML:2.1 0.00143 1.08 AML other m 2017-01-20T04:47:10.12
IV.T1299.HNN. ML:1.8 0.001165 0.14 AML other m 2017-01-20T04:47:06.46
IV.T1299.EHN. ML:1.8 0.0011975 0.14 AML other m 2017-01-20T04:47:06.46
IV.T1299.HNE. ML:1.7 0.0008520000000000001 0.26 AML other m 2017-01-20T04:47:06.46
IV.T1299.EHE. ML:1.7 0.0008605 0.26 AML other m 2017-01-20T04:47:06.46
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