Table 2 The DR violation statistics for the impedance tensors from the onshore MT/BBMT database of Nord-West Ltd
From: Validity of the dispersion relations in magnetotellurics. Part II: synthetic and field data
Objects | The amount of impedance tensors examined | |||
|---|---|---|---|---|
Total number | Anomalous | Strongly anomalous | Non-causal | |
Geotraverses 1-SB, 2-DV, 2-DVa, 3-DV, 8-DV, PU (2001–2019, Russia) | 7832 (100%) | 703 (9.0%) | 212 (2.7%) | 5 (< 0.1%) |
Taymyr Super Object (2005–2019, Russia) | 20,484 (100%) | 61 (0.3%) | 8 (< 0.1%) | 0 (< 0.1%) |
Other major objects (2004–2019, Argentina, Bolivia, Brazil, Bulgaria, Colombia, India, Iran, Kazakhstan, Russia) | 31,910 (100%) | 273 (0.9%) | 35 (0.1%) | 1 (< 0.1%) |
All together | 60,226 (100%) | 1037 (1.7%) | 255 (0.4%) | 6 (< 0.1%) |