Surveillance de trémors et glissements épisodiques (TGÉ)

Des trémors et glissements épisodiques (TGÉ) se produisent á tous les 14 á 16 mois environ dans le sud de l’île de Vancouver. Le phénomène des TGÉ est caractérisé par de subtils déplacements en surface s’accumulant sur des intervalles de quelques jours á quelques semaines et qui s’effectuent dans une direction opposée á celle des tendances de déformation á long terme. Ces déplacements transitoires s’accompagnent de trémors sismiques distincts présentant l’aspect de bruit de fond, mais qui sont enregistrés en de multiples stations.

Dans cette page, on affiche la succession chronologique des changements quotidiens de position enregistrés en des sites GPS exploités en continu choisis parmi ceux des réseaux WCDA et PBO. Les positions sont estimées au moyen du logiciel Bernese 5.0 d’après les orbites précises rapides (IGR) produites par l’International GNSS Service (IGS). Les changements sont établis d’après la position du site GPS de Penticton (OFR) que l’on suppose fixe sur la plaque nord-américaine et pour laquelle on a attribué á la moyenne des successions chronologiques affichées la valeur zéro. Les variations de position d’un jour á l’autre communes á TOUS les sites des réseaux sont des plus vraisemblablement attribuables á des changements au site de référence. Pendant l’hiver, on s’attend également á ce que l’accumulation de neige sur les antennes engendre de faux changements de position pouvant atteindre jusqu’á plusieurs centimètres (p. ex. WSLR). Les graphiques sont mis á jour quotidiennement dès que l’analyse des résultats devient disponible.

La disposition des successions chronologiques dans l’affichage ci-dessous correspond approximativement aux positions géographiques relatives des sites. ELIZ se situe sur la côte ouest de la partie nord de l’île de Vancouver et P423 á l’extrême sud-est du sous-réseau affiché. Pour une représentation plus nette des emplacements des sites, veuillez consulter la carte des sites GPS. Choisir une composante (latitude, longitude ou hauteur) et présenter ce choix pour obtenir les graphiques mis á jour pour tous les sites. En cliquant sur les graphiques pour des sites individuels on affichera pour ce site les trois composantes dans un même cadre.

NOTE: Les données sont analysées en utilisant IGR orbites d’une journée de retard, et les résultats d’analyse sont normalement mis à jour à 20:00 UT par jour.

Veuillez choisir une composante á afficher :

Passez au texte alternatif pour les graphiques des déplacements des sites GPS.

Déplacement de séries chronologiques pour Latitude
ELIZ: Latitude WOST: Latitude BCOV: Latitude
NTKA: Latitude QUAD: Latitude WSLR: Latitude
UCLU: Latitude PTAL: Latitude NANO: Latitude
BAMF: Latitude CLRS: Latitude SC04: Latitude
PTRF: Latitude PGC5: Latitude P439: Latitude
NEAH: Latitude ALBH: Latitude SC02: Latitude
P401: Latitude P436: Latitude SEDR: Latitude
PABH: Latitude P418: Latitude P423: Latitude
Déplacements (mm) des sites GPS: Latitude
Date \ SiteELIZWOSTBCOVNTKAQUADWSLRUCLUPTALNANOBAMFCLRSSC04PTRFPGC5P439NEAHALBHSC02P401P436SEDRPABHP418P423
Date / SiteELIZWOSTBCOVNTKAQUADWSLRUCLUPTALNANOBAMFCLRSSC04PTRFPGC5P439NEAHALBHSC02P401P436SEDRPABHP418P423
2017-06-01-0.77-2.35-0.320.16-0.06-1.25-0.820.79-0.033.360.310.160.672.57-0.65-0.11-0.600.19-0.99-0.76-1.15-0.07
2017-06-02-1.17-2.95-0.321.660.14-0.551.18-0.81-1.63-0.341.211.160.873.570.350.89-0.10-1.110.21-0.560.150.63
2017-06-03-4.47-4.85-2.92-2.54-2.06-2.35-1.32-2.21-2.03-3.04-2.29-2.64-2.23-2.33-2.85-1.91-2.70-2.51-1.89-2.96-3.15-2.47
2017-06-04-1.170.55-1.020.46-0.660.85-0.02-0.61-0.63-0.24-0.190.460.67-1.730.25-0.21-1.20-0.311.41-1.06-0.35-0.57
2017-06-05-1.27-1.85-1.120.36-0.460.750.080.890.270.06-0.390.260.27-1.93-0.95-0.41-0.50-0.210.11-0.260.25-0.47
2017-06-06-1.07-0.25-0.72-0.54-2.26-0.35-0.52-0.41-1.33-1.04-1.390.56-1.23-2.93-0.55-1.31-1.10-1.41-1.09-1.56-1.35-1.77
2017-06-07-1.27-0.15-0.32-0.34-0.66-0.15-0.02-1.81-1.330.46-0.691.06-0.33-2.23-0.750.29-0.70-0.910.01-0.260.25-0.77
2017-06-082.332.351.682.360.442.651.881.491.072.662.112.362.174.271.151.891.103.192.811.342.551.53
2017-06-09-1.770.65-1.12-0.74-0.960.850.080.99-0.03-0.44-0.390.460.372.27-1.050.29-0.70-0.71-0.09-0.76-0.35-0.57
2017-06-10-2.37-0.55-1.52-0.64-1.16-0.25-0.92-1.41-1.43-1.04-0.39-0.54-0.23-0.53-1.75-0.31-1.50-0.51-0.79-1.56-1.45-2.27
2017-06-11-1.770.45-0.320.56-1.060.65-0.02-0.41-0.73-0.640.210.460.77-1.53-0.450.89-0.80-0.710.11-0.56-0.850.13
2017-06-12-0.770.75-0.720.96-0.560.750.480.99-0.03-0.34-0.190.260.47-1.13-0.35-0.31-0.30-0.510.71-0.16-0.05-0.57
2017-06-13-0.471.45-0.220.46-0.060.55-0.52-0.31-0.43-0.940.21-0.540.070.37-0.25-0.610.30-0.810.51-0.96-0.75-0.87
2017-06-14-0.87-0.85-1.02-0.14-0.66-0.45-0.62-0.11-0.93-0.54-0.39-0.44-0.530.27-0.95-0.41-0.30-0.71-0.19-1.26-0.85-1.17
2017-06-150.33-1.05-1.421.06-1.26-1.45-1.02-1.51-1.33-0.74-0.39-1.24-1.031.87-0.75-0.81-0.90-0.810.61-0.26-0.85-1.27
2017-06-160.232.750.181.360.54-0.750.781.390.472.661.711.961.775.671.450.390.200.490.210.440.251.23
2017-06-17-0.070.950.280.961.140.450.68-0.210.270.860.911.760.770.170.851.690.600.690.91-0.060.35-0.07
2017-06-181.532.251.082.161.442.651.382.090.871.361.912.161.874.370.951.792.001.292.411.440.851.13
2017-06-190.33-0.850.380.560.140.45-0.12-0.41-0.830.160.810.760.671.77-0.95-0.41-0.10-0.210.01-1.06-0.55-0.77
2017-06-20-1.670.55-1.020.360.04-0.75-0.82-0.51-1.031.66-0.59-0.54-0.43-0.230.35-1.41-1.40-0.71-0.59-1.56-0.750.03
2017-06-21-2.170.95-0.520.86-0.360.050.18-0.110.07-0.540.110.660.67-1.33-0.55-0.31-0.60-0.41-1.09-0.76-0.35-0.07
2017-06-220.530.850.082.460.541.350.380.390.271.760.911.161.17-0.531.551.090.700.491.510.640.350.93
2017-06-230.530.35-0.121.96-0.660.450.381.19-0.730.060.510.56-0.03-1.53-0.150.590.20-0.110.810.240.55-1.17
2017-06-27-4.270.35-1.22-1.24-1.76-0.25-1.32-2.91-1.63-0.94-1.09-1.04-1.23-3.13-1.25-1.11-1.50-1.11-1.29-0.86-0.65-1.97
2017-06-28-2.470.65-0.82-0.04-0.160.550.08-0.61-0.73-0.340.110.060.27-2.23-0.35-0.11-1.00-0.110.61-0.56-0.55-1.07
2017-06-29-3.07-0.85-1.92-1.84-2.06-1.35-1.72-2.11-1.73-1.54-1.59-1.94-1.43-3.43-2.25-1.51-2.50-2.11-1.19-2.16-2.25-2.17
2017-06-300.030.151.080.260.541.950.88-0.010.171.161.010.160.77-0.730.750.791.100.391.610.240.150.33
2017-07-01-1.07-0.35-1.62-1.24-0.56-0.15-0.32-2.11-1.330.86-1.09-0.84-1.43-2.03-0.75-0.11-0.900.390.31-0.76-1.35-1.87
2017-07-02-1.77-1.05-1.120.36-1.260.15-0.62-1.01-0.83-0.94-0.39-1.14-1.23-1.73-1.45-0.71-0.80-0.81-0.29-1.36-1.95-0.37
2017-07-03-1.072.350.281.560.240.751.280.191.07-0.141.010.260.070.470.350.29-0.200.691.61-0.06-0.350.23
2017-07-04-0.97-0.15-1.22-0.74-0.960.45-0.52-1.61-1.73-0.94-0.89-0.64-1.03-2.43-1.25-0.51-1.10-0.31-0.19-0.96-0.45-1.67
2017-07-05-1.07-1.45-0.82-0.24-1.36-1.05-1.62-1.51-1.63-1.14-1.69-0.84-1.03-2.53-0.55-1.31-1.90-0.81-0.39-1.36-0.75-1.37
2017-07-06-1.07-0.15-1.22-0.54-1.16-1.25-0.02-0.01-0.93-0.84-1.39-0.44-1.03-2.63-0.85-0.21-1.30-1.61-0.49-1.36-1.15-0.97
2017-07-070.030.55-0.120.16-0.160.750.38-0.21-0.330.06-0.991.360.17-1.730.450.69-0.200.592.41-0.361.250.33
2017-07-08-0.670.15-0.92-0.940.640.75-0.32-1.51-1.23-0.14-0.19-0.140.07-1.73-0.35-0.11-0.700.290.61-0.26-0.25-0.97
2017-07-09-1.67-4.55-0.92-0.94-1.86-0.75-2.12-1.51-1.53-1.64-1.29-2.24-1.13-2.43-1.35-2.11-1.60-2.11-0.49-0.86-1.35-2.47
2017-07-10-0.870.75-0.620.960.04-1.95-0.92-0.11-1.23-0.54-0.69-1.240.07-1.73-1.05-0.41-1.10-0.810.11-0.66-0.45-0.87
2017-07-11-0.270.55-0.12-0.140.440.35-0.12-0.010.07-0.440.210.16-0.13-1.930.15-0.010.100.190.31-0.260.55-0.37
2017-07-12-0.970.950.180.260.340.45-0.120.39-0.03-0.040.210.960.67-0.73-0.650.290.200.491.010.140.450.23
2017-07-13-0.270.85-0.52-0.74-0.26-0.65-0.021.19-0.430.360.510.060.17-0.93-0.150.29-0.50-0.210.61-0.460.05-0.27
2017-07-14-1.47-0.55-1.02-0.24-0.260.25-0.820.59-1.63-0.540.11-0.14-0.43-1.530.05-0.31-1.00-0.210.01-0.26-0.45-0.67
2017-07-150.13-4.250.680.460.04-0.15-0.420.391.470.960.610.36-0.13-2.13-0.65-0.610.000.990.61-0.26-0.15-0.57
2017-07-162.434.052.883.463.544.853.082.092.873.863.412.362.471.671.953.393.403.292.912.242.452.73
2017-07-17-0.47-0.65-0.42-0.74-0.26-0.55-1.32-1.11-2.53-0.74-0.890.16-0.43-2.230.250.59-0.500.69-0.390.340.55-0.17
2017-07-18-0.57-0.050.48-0.24-0.160.250.080.090.17-0.240.31-0.04-0.33-1.130.050.19-0.400.190.010.340.150.23
2017-07-19-0.47-0.25-0.82-1.64-0.36-2.15-0.520.29-1.630.06-0.59-0.140.17-1.830.15-0.41-0.500.49-0.490.24-1.65-0.57
2017-07-200.231.050.98-0.54-1.36-0.350.48-0.21-0.73-2.040.61-0.040.370.67-0.85-0.51-0.400.090.11-0.360.15-0.97
2017-07-21-0.67-0.05-0.52-1.54-0.96-0.25-0.82-0.51-1.03-0.340.11-0.04-1.53-1.23-0.75-1.01-0.60-0.11-0.09-0.660.05-0.77
2017-07-22-0.37-1.35-1.92-1.14-0.76-0.45-0.82-0.41-2.33-1.44-0.39-1.64-1.630.47-0.85-1.21-0.50-0.91-0.59-1.46-0.85-1.17
2017-07-23-1.77-0.75-1.22-1.44-0.76-1.35-0.82-1.11-1.93-0.84-0.89-1.64-1.43-1.93-0.65-0.71-1.50-0.91-1.29-1.56-2.15-1.37
2017-07-24-0.071.65-0.02-0.14-0.060.25-0.021.09-0.63-0.140.010.36-0.53-0.93-0.150.290.00-0.310.910.241.151.03
2017-07-250.33-0.65-0.32-0.740.740.75-0.32-0.11-0.43-0.34-0.490.06-1.13-1.23-0.15-0.710.30-0.110.010.440.551.33
2017-07-260.830.750.58-0.140.441.250.880.190.270.060.210.760.871.270.150.290.301.191.310.540.450.93
2017-07-27-0.270.35-0.12-0.340.540.35-0.220.49-0.630.060.610.66-0.43-0.030.850.69-0.100.590.210.54-0.15-0.27
2017-07-28-0.17-0.65-1.32-1.340.14-2.45-0.72-0.91-2.43-0.34-0.99-0.64-0.73-1.73-0.25-0.91-1.10-0.610.01-0.76-0.95-0.67
2017-07-29-0.370.250.18-1.74-0.06-0.55-0.12-0.51-1.43-0.74-0.49-0.04-0.53-1.03-0.05-0.81-0.70-0.01-0.49-0.56-0.45-0.47
2017-07-30-1.07-1.35-2.12-2.54-1.86-1.75-1.52-2.31-1.73-2.04-1.89-2.74-1.53-1.63-1.05-1.11-0.30-1.01-1.39-1.96-1.45-1.87
2017-07-31-2.57-2.35-2.62-2.04-2.16-1.65-3.42-2.51-5.33-2.24-2.29-2.24-2.63-4.23-1.05-1.91-2.30-3.41-3.09-2.86-1.55-3.97
2017-08-01-1.97-0.85-2.12-0.94-1.66-1.25-2.02-1.81-3.23-0.94-1.69-2.24-1.83-2.83-2.55-1.31-1.40-1.41-1.09-1.06-1.15-1.17
2017-08-02-3.07-2.15-3.320.06-1.86-1.35-1.82-1.91-2.93-1.94-2.49-1.34-2.73-3.93-1.55-2.41-2.30-1.91-1.79-1.66-1.25-1.17
2017-08-030.33-0.15-0.121.06-0.06-0.25-0.12-0.11-0.53-0.74-1.09-1.04-0.73-2.13-0.35-0.01-0.40-0.210.81-0.060.05-0.47
2017-08-04-1.77-1.55-1.72-0.74-0.96-0.35-0.82-0.41-1.63-0.34-1.59-1.44-1.13-2.53-0.95-0.11-1.20-1.11-0.99-0.76-0.75-1.07
2017-08-05-0.57-0.85-1.22-2.44-1.36-1.05-2.12-1.31-1.93-1.54-1.79-1.24-1.33-1.93-0.85-1.41-1.30-1.31-1.09-1.26-0.95-0.47
2017-08-060.931.150.581.060.340.450.28-0.61-0.330.460.51-0.240.27-0.530.850.490.800.491.210.340.151.13
2017-08-07-0.170.55-0.320.660.340.250.480.49-1.830.460.21-0.840.07-0.63-0.250.79-0.100.190.410.14-0.250.03
2017-08-080.53-0.45-0.42-2.44-0.96-0.05-0.02-0.11-1.53-0.94-0.89-0.44-0.63-1.23-0.85-0.31-0.40-0.71-0.69-0.26-0.35-1.27
2017-08-090.030.45-0.32-1.84-0.26-0.150.380.79-0.93-0.84-0.79-0.64-0.73-0.93-0.55-0.21-0.30-0.51-0.69-1.360.350.43
2017-08-100.13-0.85-1.32-0.34-0.36-0.55-0.92-1.01-2.33-1.24-1.39-0.54-1.13-1.63-0.95-0.31-0.600.19-0.090.14-0.55-0.87
2017-08-11-0.07-0.25-0.32-0.040.140.451.080.29-1.63-1.240.61-0.740.67-0.030.750.690.600.69-0.890.041.050.43
2017-08-121.63-1.45-0.220.86-0.96-1.05-0.42-0.41-3.53-0.14-0.59-0.640.271.571.05-0.51-0.100.19-1.290.84-1.150.83
2017-08-13-1.77-2.45-2.82-2.14-2.56-2.35-4.02-1.61-2.43-2.44-3.49-2.84-1.631.17-1.95-2.31-1.90-2.11-2.29-1.36-1.65-1.07
2017-08-14-0.270.05-0.62-0.64-0.06-0.750.28-0.71-1.13-0.84-0.39-0.54-0.23-0.63-0.15-0.710.200.39-0.990.240.150.33
2017-08-150.63-0.45-0.520.66-0.060.150.380.39-1.23-0.44-0.89-1.140.17-1.23-0.45-0.21-0.100.490.01-0.260.050.93
2017-08-16-1.17-1.75-1.12-2.34-0.96-1.65-0.92-1.11-2.53-1.14-1.09-0.94-1.83-0.33-0.65-2.21-0.60-2.91-1.59-1.06-1.15-0.57
2017-08-170.43-0.25-0.92-0.94-0.36-0.25-0.62-0.41-2.23-0.74-0.79-0.64-0.431.370.25-0.51-0.30-0.01-0.79-0.16-0.650.13
2017-08-18-0.17-1.15-0.42-0.84-0.46-0.05-1.62-1.61-2.13-2.04-1.09-1.24-1.630.47-0.75-1.41-0.80-1.81-1.29-0.56-1.65-0.77
2017-08-190.931.350.880.560.040.150.18-0.61-0.53-0.740.810.660.471.271.350.290.600.190.310.740.351.13
2017-08-201.93-1.65-0.42-0.340.24-0.35-0.52-0.31-1.63-0.54-0.09-0.640.57-0.330.65-0.610.20-0.49-0.450.13
2017-08-211.03-0.650.48-0.64-0.760.350.58-0.01-1.83-0.540.010.16-0.230.770.65-0.010.200.090.510.74-0.35-0.47
2017-08-221.43-0.250.68-0.54-0.160.25-0.320.29-0.730.060.111.76-0.13-0.430.450.390.70-0.310.010.340.751.53
2017-08-23-0.27-1.85-0.62-2.34-1.66-0.25-1.02-0.71-2.83-0.64-0.89-0.94-1.53-0.731.55-1.410.600.09-1.09-0.66-0.450.83
2017-08-24-0.57-1.15-1.32-1.34-0.46-2.25-0.32-1.61-2.23-1.84-1.99-1.64-1.53-0.73-0.55-1.21-1.00-1.51-0.69-1.56-1.65-0.27
2017-08-251.130.05-0.22-0.04-0.06-0.05-0.42-0.01-0.43-0.140.21-0.04-0.33-0.230.45-0.310.700.190.110.441.250.83
2017-08-261.930.950.880.760.240.450.18-0.11-0.230.360.310.560.470.671.050.290.900.790.910.340.250.43
2017-08-271.230.850.98-0.340.44-0.45-0.120.99-0.93-0.040.310.161.07-0.331.750.89-0.100.49-0.190.940.650.73
2017-08-281.030.751.180.56-0.160.450.48-0.51-0.03-0.44-0.09-0.040.37-0.630.450.69-0.600.591.010.340.550.93
2017-08-291.43-0.850.28-0.540.74-1.05-0.12-0.210.671.060.310.661.070.371.550.090.202.191.111.440.551.43
2017-08-301.63-3.650.38-1.540.44-1.25-0.12-1.91-1.830.060.110.161.872.170.850.290.400.290.411.040.750.33
2017-08-314.132.451.681.361.141.451.281.39-0.430.761.711.562.074.971.552.192.001.291.712.041.651.93
2017-09-014.332.352.281.862.942.751.982.291.471.562.612.061.972.272.752.092.701.492.012.942.652.53
2017-09-02-0.551.680.361.442.251.881.490.271.461.410.961.670.771.251.191.500.891.611.442.151.73
2017-09-240.550.880.461.141.051.180.593.770.560.310.060.770.070.950.790.801.490.411.040.350.83
2017-09-261.351.781.261.340.851.181.293.971.161.311.161.073.971.151.091.301.090.411.641.151.73
2017-09-270.850.98-0.040.94-0.15-0.12-0.014.770.260.61-0.240.17-0.830.450.590.500.09-0.090.640.450.73
2017-09-280.850.380.84-0.150.480.794.870.160.61-0.240.17-1.130.550.691.100.29-0.690.841.051.43
2017-09-292.051.982.14-0.95-0.221.593.373.260.910.961.774.570.751.292.701.890.111.442.250.93
2017-09-301.151.882.241.35-0.422.294.671.060.61-0.240.473.77-0.15-0.811.501.19-0.391.741.751.43
2017-10-012.35-0.021.040.950.180.894.571.360.810.260.471.670.550.191.10-0.21-1.191.541.151.73
2017-10-02-0.750.680.04-0.850.18-0.813.17-0.34-0.39-0.54-0.73-1.23-0.35-0.41-0.40-0.41-0.990.24-0.150.13
2017-10-03-0.850.480.64-0.35-0.020.092.97-0.140.51-0.24-0.530.25-0.010.50
2017-10-050.451.980.861.541.051.381.794.271.361.511.060.470.670.851.291.401.090.611.341.451.43
2017-10-060.551.680.760.740.751.180.093.770.260.911.160.372.97-1.05-1.110.900.69-0.190.840.650.53
2017-10-07-0.050.78-1.84-0.26-0.250.380.292.27-0.340.310.760.172.871.851.190.100.19-2.390.44-0.95-0.87
2017-10-080.632.552.581.461.540.35-0.021.194.570.860.010.360.370.070.550.590.600.39-0.590.640.550.13
2017-10-093.53-0.052.480.061.940.851.281.794.471.860.811.360.571.771.451.191.401.190.511.441.951.53
2017-10-101.931.452.38-0.140.840.850.880.395.171.261.311.661.171.870.351.292.300.59-0.591.741.451.13
2017-10-112.830.851.280.960.840.150.381.993.470.360.810.56-0.030.47-0.150.492.200.590.311.840.450.53
2017-10-122.731.151.581.061.340.951.382.395.171.960.410.960.672.670.250.791.700.490.011.141.251.53
2017-10-131.230.952.281.960.740.050.180.993.171.661.110.760.473.87-0.250.790.900.59-0.290.940.651.33
2017-10-154.03-0.152.983.062.540.451.882.593.871.862.111.561.274.771.051.992.201.390.312.241.651.43
2017-10-165.531.353.682.562.343.051.482.595.471.962.811.361.972.270.451.091.700.390.810.840.950.13
2017-10-183.130.552.381.861.74-0.551.681.393.872.160.71-0.340.774.670.450.791.100.190.211.04-0.050.93
2017-10-194.533.852.982.963.14-1.357.984.994.372.663.712.563.677.673.353.193.404.890.614.343.354.23