@article{fdi:010055689,
  title = {{S}elf potential signals preceding variations of fumarole activity at {M}erapi volcano, {C}entral {J}ava},
  author = {{B}yrdina, {S}vetlana and {R}ucker, {C}. and {Z}immer, {M}. and {F}riedel, {S}. and {S}erfling, {U}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his paper analyzes simultaneous self-potential and gas temperature variations recorded at {M}erapi volcano in spring 2011, the dry season shortly after the volcanic crisis 2001. {T}emporal variations of fumarole gas temperature show characteristic quasi periodic signals at scales 1-8 h and amplitudes up to ten degrees. {W}e propose a simple graphical technique combining a wavelet scalogram and a cross-correlation analysis to demonstrate that the variations of gas temperature are systematically preceded by self-potential variations at the same scales. {T}he influence of meteorological variations on these correlated signals can be ruled out. {R}ather, we suggest them to be related to the magma degassing in the upper conduits of the volcano. {W}e discuss a semi-qualitative model to explain this correlation and the observed phase shift of about two hours.},
  keywords = {{S}elf-potential monitoring ; {H}ydrothermal system ; {G}as monitoring ; {M}erapi},
  booktitle = {},
  journal = {{J}ournal of {V}olcanology and {G}eothermal {R}esearch},
  volume = {215},
  numero = {},
  pages = {40--47},
  ISSN = {0377-0273},
  year = {2012},
  DOI = {10.1016/j.jvolgeores.2011.12.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010055689},
}