TY - JOUR T1 - Changes in the ultra-low frequency wave field during the precursor phase to the Sichuan earthquake: DEMETER observations JO - Annales Geophysicae UR - http://eprints.whiterose.ac.uk/78602/ PY - 2013/01/01 AU - Walker SN AU - Kadirkamanathan V AU - Pokhotelov OA ED - DO - DOI: 10.5194/angeo-31-1597-2013 VL - 31 IS - 9 SP - 1597 EP - 1603 Y2 - 2025/07/29 ER -