Earthquake with magnitude of ML 1.6 on date 02-04-2017 and time 17:50:21 (Italy) in region 6 km SW Amatrice (RI)

A magnitude ML 1.6 earthquake occured in region: 6 km SW Amatrice (RI), on

  • 02-04-2017 15:50:21 (UTC)
  • 02-04-2017 17:50:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.59, 13.24 at 11 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.

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 6 2657 2657
Montereale AQ 7 2581 5238
Cittareale RI 8 482 5720
Capitignano AQ 9 665 6385
Campotosto AQ 11 542 6927
Borbona RI 12 617 7544
Accumoli RI 12 667 8211
Posta RI 14 694 8905
Cagnano Amiterno AQ 14 1369 10274
Barete AQ 15 737 11011
Pizzoli AQ 17 4326 15337

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
78 Km NE of Guidonia Montecelio (88673 inhabitants)
78 Km NE of Tivoli (56533 inhabitants)
80 Km W of Chieti (51815 inhabitants)
81 Km W of Pescara (121014 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
99 Km NE of Roma (2864731 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.6 2017-04-02
15:50:21
42.59 13.24 11 2017-04-02
15:56:03
Sala Sismica INGV-Roma 43294361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-02 15:50:21 ± 0.06
Latitude 42.59 ± 0.00
Longitude 13.24 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 43294361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 329
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.53869
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 43294361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-04-02 15:56:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2017-04-02T15:50:40.97 0.6 undecidable manual S 294 0.5387 50 1.3 29
IV.T1219.EHZ. 2017-04-02T15:50:39.09 0.6 undecidable manual S 340 0.5 50 0.56 41
IV.T1211.EHZ. 2017-04-02T15:50:32.10 0.1 undecidable manual S 260 0.2887 50 -0.16 93
IV.MOMA.HHZ. 2017-04-02T15:50:32.07 3.0 undecidable manual P 294 0.5387 50 0.22 0
IV.T1220.EHZ. 2017-04-02T15:50:32.14 1.0 negative manual P 348 0.5351 50 0.34 21
IV.GIGS.HHZ. 2017-04-02T15:50:31.76 0.1 undecidable manual S 118 0.2788 50 -0.19 93
IV.NRCA.HHZ. 2017-04-02T15:50:31.37 0.1 undecidable manual S 339 0.2644 50 -0.16 94
IV.T1219.EHZ. 2017-04-02T15:50:31.57 0.3 undecidable manual P 340 0.5 50 0.37 64
IV.T1217.EHZ. 2017-04-02T15:50:31.14 0.1 undecidable manual S 299 0.2599 50 -0.27 92
IV.TERO.HHZ. 2017-04-02T15:50:31.41 0.3 undecidable manual S 82 0.2698 50 -0.29 68
IV.T1212.EHZ. 2017-04-02T15:50:30.00 0.1 undecidable manual S 319 0.2194 50 -0.21 94
IV.T1247.HHZ. 2017-04-02T15:50:28.26 0.3 undecidable manual S 164 0.1502 123 0.18 72
IV.T1218.EHZ. 2017-04-02T15:50:27.02 0.1 undecidable manual S 312 0.125 128 -0.25 94
IV.TERO.HHZ. 2017-04-02T15:50:27.19 0.1 positive manual P 82 0.2698 50 -0.06 95
IV.T1241.EHZ. 2017-04-02T15:50:27.82 0.1 undecidable manual P 27 0.304 50 -0.02 96
IV.GIGS.HHZ. 2017-04-02T15:50:27.24 1.0 undecidable manual P 118 0.2788 50 -0.17 23
IV.NRCA.HHZ. 2017-04-02T15:50:27.27 0.3 negative manual P 339 0.2644 50 0.11 71
IV.T1217.EHZ. 2017-04-02T15:50:27.05 0.1 undecidable manual P 299 0.2599 50 -0.04 96
IV.T1211.EHZ. 2017-04-02T15:50:27.61 0.1 undecidable manual P 260 0.2887 50 0.03 96
IV.T1212.EHZ. 2017-04-02T15:50:26.38 0.6 positive manual P 319 0.2194 50 -0.01 49
IV.SMA1.EHZ. 2017-04-02T15:50:26.09 0.1 undecidable manual S 57 0.0827 140 0 100
IV.T1299.EHZ. 2017-04-02T15:50:25.20 0.1 undecidable manual S 32 0.0567 150 -0.32 94
IV.T1247.HHZ. 2017-04-02T15:50:25.46 0.1 undecidable manual P 164 0.1502 123 0.29 93
IV.RM33.EHZ. 2017-04-02T15:50:25.68 0.1 undecidable manual S 194 0.0791 141 -0.34 93
IV.T1214.EHZ. 2017-04-02T15:50:25.79 0.6 undecidable manual P 352 0.1745 119 0.16 48
IV.RM33.EHZ. 2017-04-02T15:50:24.09 0.1 undecidable manual P 194 0.0791 141 0.12 98
IV.SMA1.EHZ. 2017-04-02T15:50:24.36 0.1 positive manual P 57 0.0827 140 0.34 93
IV.T1218.EHZ. 2017-04-02T15:50:24.73 0.1 undecidable manual P 312 0.125 128 0.03 99
IV.T1299.EHZ. 2017-04-02T15:50:23.85 0.1 undecidable manual P 32 0.0567 150 0.17 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.4 0.0001275 1.56 AML other m 2017-04-02T15:50:31.17
IV.NRCA.HHE. ML:1.4 0.0001135 1.08 AML other m 2017-04-02T15:50:32.73
IV.RM33.EHE. ML:1.7 0.000643 0.66 AML other m 2017-04-02T15:50:26.61
IV.RM33.HNE. ML:1.7 0.0006945 0.66 AML other m 2017-04-02T15:50:26.61
IV.RM33.EHN. ML:1.7 0.0006365 1.5 AML other m 2017-04-02T15:50:26.78
IV.RM33.HNN. ML:1.7 0.0006475 1.5 AML other m 2017-04-02T15:50:26.78
IV.SMA1.EHN. ML:1.6 0.0005355 0.56 AML other m 2017-04-02T15:50:26.50
IV.SMA1.EHE. ML:2.1 0.00168 0.58 AML other m 2017-04-02T15:50:26.58
IV.T1211.EHE. ML:1.3 9.315E-5 0.3 AML other m 2017-04-02T15:50:34.51
IV.T1211.EHN. ML:1.4 0.0001051 0.46 AML other m 2017-04-02T15:50:34.49
IV.T1212.EHN. ML:1.2 9.88E-5 0.16 AML other m 2017-04-02T15:50:30.27
IV.T1212.EHE. ML:1.2 0.0001073 0.5 AML other m 2017-04-02T15:50:31.08
IV.T1218.EHE. ML:1.4 0.000256 0.8 AML other m 2017-04-02T15:50:27.28
IV.T1218.HNE. ML:1.5 0.0003245 0.82 AML other m 2017-04-02T15:50:27.68
IV.T1218.HNN. ML:1.8 0.000596 0.22 AML other m 2017-04-02T15:50:27.28
IV.T1218.EHN. ML:1.8 0.000592 0.22 AML other m 2017-04-02T15:50:27.28
IV.T1299.HNE. ML:1.8 0.001035 0.38 AML other m 2017-04-02T15:50:25.59
IV.T1299.EHE. ML:1.8 0.001065 0.4 AML other m 2017-04-02T15:50:25.60
IV.T1299.EHN. ML:1.9 0.001144 0.86 AML other m 2017-04-02T15:50:25.75
IV.T1299.HNN. ML:1.8 0.0010915 0.44 AML other m 2017-04-02T15:50:25.75
IV.TERO.HHE. ML:1.2 7.42E-5 1.56 AML other m 2017-04-02T15:50:33.21
IV.TERO.HHN. ML:1.3 8.795E-5 0.6 AML other m 2017-04-02T15:50:34.00
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download