INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.8 on date 11-08-2017 and time 23:22:33 (Italy) in region 2 km SE Oncino (CN)

A magnitude ML 1.8 earthquake occured in region: 2 km SE Oncino (CN), on

  • 11-08-2017 21:22:33 (UTC)
  • 11-08-2017 23:22:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.66, 7.21 at 14 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Oncino CN 2 76 76
Ostana CN 4 83 159
Paesana CN 6 2784 2943
Crissolo CN 6 168 3111
Sanfront CN 9 2395 5506
Sampeyre CN 9 1022 6528
Rifreddo CN 11 1078 7606
Gambasca CN 11 371 7977
Barge CN 11 7774 15751
Frassino CN 11 265 16016
Martiniana Po CN 13 734 16750
Envie CN 13 2074 18824
Bagnolo Piemonte CN 14 6024 24848
Casteldelfino CN 14 157 25005
Revello CN 14 4262 29267
Melle CN 14 292 29559
Rorà TO 15 257 29816
Pontechianale CN 15 179 29995
Brossasco CN 16 1084 31079
Isasca CN 16 76 31155
Lusernetta TO 16 506 31661
Bibiana TO 16 3442 35103
Brondello CN 17 290 35393
Elva CN 17 97 35490
Valmala CN 17 52 35542
Villar Pellice TO 17 1076 36618
Luserna San Giovanni TO 17 7395 44013
Torre Pellice TO 18 4551 48564
Campiglione Fenile TO 18 1390 49954
Bobbio Pellice TO 18 563 50517
Pagno CN 18 585 51102
Bellino CN 18 109 51211
Venasca CN 18 1437 52648
Castellar CN 18 295 52943
Macra CN 18 59 53002
Cavour TO 19 5545 58547
Stroppo CN 19 103 58650
Bricherasio TO 20 4616 63266
San Damiano Macra CN 20 430 63696

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of Cuneo (56081 inhabitants)
53 Km SW of Moncalieri (57294 inhabitants)
59 Km SW of Torino (890529 inhabitants)
83 Km W of Asti (76202 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006 *

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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 1000 ML 1.8 2017-08-11
21:22:33
44.66 7.21 14 2018-07-06
15:40:33
Bollettino Sismico Italiano INGV 50015921
Rev 100 ML 2.0 2017-08-11
21:22:33
44.66 7.23 11 2017-08-11
21:38:23
Sala Sismica INGV-Roma 48931181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-08-11 21:22:33 ± 0.08
Latitude 44.66 ± 0.00
Longitude 7.21 ± 0.01
Depth (km) 14 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 50015921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 724
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 720
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.17087
Epicentral distance of station farthest from the epicenter (degree) 1.42273
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 50015921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-01-17 11:30:09

ML:2

Field Value
Value 2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 48931181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-08-11 21:38:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MRGE.HHZ. 2017-08-11T21:23:09.25 0.3 undecidable manual S 354 1.1116 91 0.25 58
GU.PCP.HHE. 2017-08-11T21:23:04.02 0.6 undecidable manual S 97 0.9551 92 -0.34 41
GU.CANO.HHZ. 2017-08-11T21:23:01.24 0.3 undecidable manual S 122 0.8607 92 -0.32 62
IV.QLNO.HHZ. 2017-08-11T21:23:01.62 0.6 undecidable manual S 112 0.875 92 -0.38 41
GU.LSD.HHZ. 2017-08-11T21:22:59.59 0.6 undecidable manual S 356 0.7977 92 -0.13 44
GU.RORO.HHZ. 2017-08-11T21:22:59.87 0.6 undecidable manual S 132 0.8202 92 -0.52 40
CH.DIX.HHZ. 2017-08-11T21:22:58.96 1.0 undecidable manual P 5 1.4227 91 -0.41 18
FR.SAOF.HHZ.00 2017-08-11T21:22:57.28 0.3 undecidable manual S 160 0.7186 92 -0.09 66
IV.MRGE.HHZ. 2017-08-11T21:22:54.13 0.3 undecidable manual P 354 1.1116 91 0.09 60
GU.GBOS.HHZ. 2017-08-11T21:22:53.99 0.6 undecidable manual S 133 0.6133 93 -0.27 44
MN.BNI.HHZ. 2017-08-11T21:22:51.86 0.3 undecidable manual S 316 0.5432 93 -0.33 66
GU.PCP.HHE. 2017-08-11T21:22:51.64 0.1 undecidable manual P 97 0.9551 92 0.28 80
GU.CANO.HHZ. 2017-08-11T21:22:50.13 0.1 undecidable manual P 122 0.8607 92 0.38 80
GU.BURY.HHN. 2017-08-11T21:22:50.70 1.0 undecidable manual P 164 0.9137 92 0.04 21
IV.QLNO.HHZ. 2017-08-11T21:22:50.38 0.3 undecidable manual P 112 0.875 92 0.38 60
GU.TRAV.HHZ. 2017-08-11T21:22:50.58 1.0 undecidable manual P 24 0.929 92 -0.34 20
GU.ROTM.HHZ. 2017-08-11T21:22:50.07 0.3 undecidable manual P 77 0.8292 92 0.85 50
GU.RSP.HHZ. 2017-08-11T21:22:50.31 0.3 undecidable manual S 4 0.4865 94 -0.18 70
GU.ENR.HHZ. 2017-08-11T21:22:49.44 0.6 undecidable manual S 161 0.4605 94 -0.29 45
GU.RORO.HHZ. 2017-08-11T21:22:49.32 0.1 positive manual P 132 0.8202 92 0.25 83
GU.LSD.HHZ. 2017-08-11T21:22:48.46 0.6 undecidable manual P 356 0.7977 92 -0.22 43
GU.STV.HHZ. 2017-08-11T21:22:48.40 0.3 undecidable manual S 169 0.4245 94 -0.28 68
FR.SAOF.HHZ.00 2017-08-11T21:22:47.25 0.3 undecidable manual P 160 0.7186 92 -0.08 67
IV.MONC.HHZ. 2017-08-11T21:22:46.78 0.3 undecidable manual P 51 0.6511 92 0.61 57
GU.GBOS.HHZ. 2017-08-11T21:22:45.67 0.1 undecidable manual P 133 0.6133 93 0.14 89
MN.BNI.HHZ. 2017-08-11T21:22:44.69 0.1 undecidable manual P 316 0.5432 93 0.35 86
GU.STV.HHZ. 2017-08-11T21:22:42.43 0.1 undecidable manual P 169 0.4245 94 0.12 93
GU.RSP.HHZ. 2017-08-11T21:22:42.80 0.1 undecidable manual P 4 0.4865 94 -0.56 86
GU.ENR.HHZ. 2017-08-11T21:22:42.82 0.1 positive manual P 161 0.4605 94 -0.09 94
GU.PZZ.HHZ. 2017-08-11T21:22:41.03 0.3 undecidable manual S 204 0.1709 109 -0.23 72
GU.BHB.HHE. 2017-08-11T21:22:40.75 0.3 undecidable manual S 11 0.1754 108 -0.64 69
GU.BHB.HHE. 2017-08-11T21:22:38.01 0.1 undecidable manual P 11 0.1754 108 -0.09 100
GU.PZZ.HHZ. 2017-08-11T21:22:38.47 0.6 undecidable manual P 204 0.1709 109 0.44 46
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PZZ.HHN. ML:2.3 0.0013908055 0.1792 AML other m 2017-08-11T21:22:42.57
GU.PZZ.HHE. ML:2.2 0.001093963 0.1664 AML other m 2017-08-11T21:22:43.51
GU.ENR.HHE. ML:1.9 0.00018210175 0.1024 AML other m 2017-08-11T21:22:49.31
GU.STV.HHN. ML:1.4 7.419107E-5 0.0896 AML other m 2017-08-11T21:22:49.50
GU.STV.HHE. ML:1.5 9.700599E-5 0.1152 AML other m 2017-08-11T21:22:50.02
GU.ENR.HHN. ML:1.8 0.0001550046 0.0768 AML other m 2017-08-11T21:22:50.50
MN.BNI.HHE. ML:1.4 5.71095E-5 0.2176 AML other m 2017-08-11T21:22:51.99
MN.BNI.HHN. ML:1.2 3.6804955E-5 0.2176 AML other m 2017-08-11T21:22:52.03
MN.BNI.HNN. ML:1.2 3.665445E-5 0.32 AML other m 2017-08-11T21:22:53.38
MN.BNI.HNE. ML:1.4 5.2725205E-5 0.384 AML other m 2017-08-11T21:22:53.20
GU.GBOS.HHN. ML:1.9 0.00012716585 0.2432 AML other m 2017-08-11T21:22:54.28
GU.GBOS.HHE. ML:1.8 9.4858045E-5 0.2432 AML other m 2017-08-11T21:22:54.34
GU.RORO.HHN. ML:2 9.8991E-5 0.3712 AML other m 2017-08-11T21:22:59.63
GU.RORO.HHE. ML:2 0.000113502235 0.1792 AML other m 2017-08-11T21:23:00.05
IV.MONC.HHN. ML:2 0.0001502986 0.3072 AML other m 2017-08-11T21:23:01.09
GU.LSD.HHE. ML:1.9 8.44061E-5 0.1792 AML other m 2017-08-11T21:23:01.68
GU.CANO.HHE. ML:2.2 0.000148263045 0.4096 AML other m 2017-08-11T21:23:02.31
IV.MONC.HHE. ML:2 0.0001375765 0.256 AML other m 2017-08-11T21:23:02.14
GU.CANO.HHN. ML:2 0.00010673756 0.3456 AML other m 2017-08-11T21:23:02.02
GU.LSD.HHN. ML:1.7 5.514925E-5 0.32 AML other m 2017-08-11T21:23:02.18
CH.DIX.HHE. ML:2 5.1544725E-5 0.32 AML other m 2017-08-11T21:23:25.06
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://cnt.rm.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download