INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.2 on date 21-04-2017 and time 17:26:28 (Italy) in region 4 km NE Barete (AQ)

A magnitude ML 1.2 earthquake occured in region: 4 km NE Barete (AQ), on

  • 21-04-2017 15:26:28 (UTC)
  • 21-04-2017 17:26:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.47, 13.33 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
Barete AQ 4 737 737
Pizzoli AQ 5 4326 5063
Capitignano AQ 6 665 5728
Cagnano Amiterno AQ 8 1369 7097
Montereale AQ 9 2581 9678
Campotosto AQ 10 542 10220
Scoppito AQ 12 3727 13947
L'Aquila AQ 15 69753 83700
Crognaleto TE 15 1297 84997
Borbona RI 17 617 85614
Amatrice RI 18 2657 88271
Fano Adriano TE 20 296 88567
Pietracamela TE 20 271 88838
Posta RI 20 694 89532
Lucoli AQ 20 1011 90543
Tornimparte AQ 20 3187 93730

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km NW of L'Aquila (69753 inhabitants)
37 Km SW of Teramo (54892 inhabitants)
57 Km E of Terni (111501 inhabitants)
68 Km W of Montesilvano (53738 inhabitants)
70 Km W of Chieti (51815 inhabitants)
71 Km NE of Tivoli (56533 inhabitants)
72 Km NE of Guidonia Montecelio (88673 inhabitants)
73 Km W of Pescara (121014 inhabitants)
74 Km SE of Foligno (57155 inhabitants)
95 Km NE of Roma (2864731 inhabitants)
98 Km NE of Velletri (53303 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 Date and Time (UTC) Latitude Longitude Magnitude Depth (km) Published time (UTC) Author Location ID
Rev 100 2017-04-21
15:26:28
42.47 13.33 ML 1.2 11 2017-04-21
15:31:38
Sala Sismica INGV-Roma 44182931
Best location and best magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-21 15:26:28 ± 0.08
Latitude 42.47 ± 0.00
Longitude 13.33 ± 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 44182931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 521
Semi-minor axis of confidence ellipse (meter) 286
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
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 15
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.45146
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 44182931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-04-21 15:31:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LIK.EHZ.01 2017-04-21T15:26:49.59 3.0 negative manual P 0.48 0
IV.T1214.EHZ. 2017-04-21T15:26:40.16 0.3 undecidable manual S 343 0.3013 50 0.1 71
IV.TERO.HHZ. 2017-04-21T15:26:38.50 0.1 undecidable manual S 53 0.2545 50 -0.16 94
IV.MC2.EHZ. 2017-04-21T15:26:37.74 0.6 undecidable manual P 347 0.4515 50 -0.05 46
IV.GIGS.HHZ. 2017-04-21T15:26:36.68 0.1 undecidable manual S 95 0.1817 50 0.16 95
IV.T1212.EHZ. 2017-04-21T15:26:36.23 3.0 negative manual P -0.17 0
IV.T1299.EHZ. 2017-04-21T15:26:36.05 0.1 undecidable manual S 349 0.1664 120 0.01 98
IV.T1214.EHZ. 2017-04-21T15:26:35.36 0.1 undecidable manual P 343 0.3013 50 0.14 94
IV.TERO.HHZ. 2017-04-21T15:26:34.27 0.3 undecidable manual P 53 0.2545 50 -0.14 70
IV.T1299.EHZ. 2017-04-21T15:26:33.02 0.1 undecidable manual P 349 0.1664 120 0.12 96
IV.GIGS.HHZ. 2017-04-21T15:26:33.09 0.3 undecidable manual P 95 0.1817 50 -0.09 72
IV.RM33.EHZ. 2017-04-21T15:26:33.53 0.1 undecidable manual S 295 0.0917 137 -0.22 96
IV.T1247.HHZ. 2017-04-21T15:26:32.55 0.1 undecidable manual S 216 0.036 160 -0.06 100
IV.RM33.EHZ. 2017-04-21T15:26:31.62 0.1 undecidable manual P 295 0.0917 137 0.04 99
IV.T1247.HHZ. 2017-04-21T15:26:31.12 0.3 undecidable manual P 216 0.036 160 0.2 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.3 0.000257 0.24 AML other m 2017-04-21T15:26:33.82
IV.RM33.EHN. ML:1.2 0.0002025 1.88 AML other m 2017-04-21T15:26:33.00
IV.T1247.HHN. ML:1.8 0.0010045 0.12 AML other m 2017-04-21T15:26:32.88
IV.T1247.HHE. ML:1.9 0.00125 0.78 AML other m 2017-04-21T15:26:33.03
IV.TERO.HHE. ML:1.1 6.16E-5 1 AML other m 2017-04-21T15:26:39.81
IV.TERO.HHN. ML:1.2 7.415E-5 0.48 AML other m 2017-04-21T15:26:40.59
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