The Working Group Induced Polarization aims at sharing general information, practical experiences, data, literature and measuring devices, at developing standards, reference materials, as well as joint projects. The working group welcomes all individuals, who are interested in IP in frequency and time domain!

german version


  • 10/14/2021 National Workshop on Induced Polarisation 2021
    On October 11/12, 2021 the National Workshop on Induced Polarisation – hosted by the working group at TU Braunschweig – was held as an online conference. Up to 35 IP enthusiasts were participating in the conference program, during which 18 talks and 10 discussion contributions inspired many interesting discussions. On October 13, right after the conference and for the very first time, a networking event brought together early career scientists, who used this opportunity to further exchange new ideas. This networking event was a great success and will definitely be repeated. We thank Andreas Hördt, Jan Mudler, Jonas Limbrock and Valentin Michels for the great organisation of these two events!
  • 10/11/2021 Matthias Halisch (LIAG) and Matthias Bücker (TUBS) elected as AKIP speakersDuring the National Workshop on Induced Polarisation 2021, Matthias Halisch (LIAG) was elected as speaker and Matthias Bücker (TU Braunschweig) as deputy speaker of the AKIP. The AKIP acknowledges the two former speakers Tina Martin and Sabine Kruschwitz for their great commitment during the last seven years. Many thanks, Tina und Sabine!

  • 03/23/2021 6th International Workshop on Induced Polarization in Annecy postponed to 2022
    Due to the still complicated pandemic, the International IP Workshop in Annecy, France was again postponed and will now hopefully take place from June 27 through 30, 2022. More detailed information is available on the IP workshop website : https://sites.google.com/view/ipworkshop6/home

  • 01/20/2021 Website updated
    After a period of inactivity, this website was updated and rearranged.
  • 11/23/2020 Prize of the Wolfgang-Helms Foundation awarded to Sarah Hupfer
    For her dissertation thesis on solution processes on carbonates AKIP member Sarah Hupfer was awarded the Prize of the Wolfgang-Helms Foundation of TU Clausthal! The award-winning thesis substantially improves our understanding of subrosion-related processes, such as sinkholes and the related risk assessment. The thesis was supervised by Matthias Halisch (LIAG), Andreas Weller (TU Clausthal), and Sabine Kruschwitz (TU Berlin). More detailed information can be found here. Congratulations Sarah!
  • 09/16/2020 AKIP on ResearchGate
    The working group has initiated the project „German Geophysical Society (DGG) Working Group IP (AK IP)“ on ResearchGate. All members of the IP community, who are active on ResearchGate, can now easily attribute their own IP-related contributions to this new project. If you are interested in joining the project, please contact Matthias Halisch (LIAG), who will add you as a “collaborator”. In this way, the working group will generate a wonderful and always-up-to-date literature list including journal articles, conference abstracts and proceedings, as well as other non-peer-reviewed contributions.
  • 09/09/2020 Updated measuring devices list
    An updated version of the list of IP measuring devices available at participating institutions can be downloaded here (last update Sep. 2020). For requests or questions, please reach out to the corresponding contact person.
  • 04/07/2020 A logo for the working group
    Thanks to Matthias Halisch (LIAG) the working group IP is proud to announce the establishment of their own logo (right hand side). From now on, the logo can be used for all kinds of publication with general topical relationship to research within our group (e.g., posters, presentations, articles if applicable, etc.). The full package can be downloaded here.

Member institutions and companies with contact persons

Current topics of the working group

  • Development and maintenance of a (S)IP data base (M. Halisch)
  • List of existing IP instruments in Germany (T. Martin)
  • Publications list including grey literature (T. Radic)
  • Overview of measuring cell systems for laboratory SIP measurements (M. Münch, state of 2006)
  • Development of a reference test network to test measurement devices (M. Münch, S. Kruschwitz, T. Radic, E. Zimmermann)
  • List of accessible and well-known test fields (E. Lück, A. Kemna, A. Weller)
  • Collection of SIP models (N. Klitzsch)
  • Comparison of IP software abilities (A. Kemna)
  • Database of samples with literature references (M. Halisch, A. Weller, E. Niederleithinger)
  • Information on (AK) (S)IP: Wikipedia entry
  • Collaborations with international IP working groups (France, USA, England, Sweden, Denmark, Russia, South Africa)


ResearchGate literature project

IP related publications are listed in our ResearchGate project „German Geophysical Society (DGG) Working Group IP (AK IP)“. Individuals who want to join this project are invited to contact Matthias Halisch (LIAG) to be added as collaborator of the project.

Literature list including non peer-reviewed literature

A collection of IP related literature up to 2015, including non peer-reviewed literature, is available on Tino Radics website (here).

DGG Colloquium proceedings 2019

During the DGG annual conference 2019 in Braunschweig, the DGG colloquium on Induced Polarization took place. The speakers shed light on practical applications and the current state-of-the art in IP research. Contributions included an introduction to the history and theoretical background of the method (Weller), the application of the method in reactive systems under reservoir conditions (Börner et al.), remediation problems (Flores Orozco et al.), ore exploration (Tauchnitz et al.), archeological applications (Ullrich et al.), as well as biogeophysics (Martin et al.).

The colloquium proceedings of all contributions can be downloaded here.

Special Issues of past International IP Workshops


Since 2004, there has been an intense cooperation of various German research institutions working on induced polarization (IP) and, particularly, on spectral induced polarization (SIP). At this time, there was an enormous demand for a forum to discuss a broad range of topics related to laboratory and field measurements, models, measuring devices, etc. During the DGG annual conference in Berlin (March 8-12, 2004), the SIP user  group was founded. In order to facilitate the cooperation within the group, e.g., by means of a joint website, during a follow-up meeting in October of the same year hosted by the University of Leipzig (Seminar „Hochauflösende Geoelektrik“, Kloster Nimbschen), the SIP user group decided to apply for the status of a DGG working group. Since December 2005, the former SIP user group has become an official working group of the DGG.

Since its foundation, the working group organizes its own workshops and meets during the DGG annual conferences to share and discuss experiences, research results, and new developments. In 2009, the German IP community initiated the international workshop on induced polarization held for the first time in Bonn. From that time on, an international exchange is organized biennially (2009 – Bonn, 2011 – Denver/USA, 2014 – Ile d’Oleron/France, 2016 – Aarhus/Denmark, 2018 – New Jersey/USA).

Mailing list

The working group maintains a news mailing list to inform all interested researchers. This list is used to distribute information on the activities of the working group, calls for open positions, and other news of general interest. The list is being maintained by the speakers of the working group. Individuals, who are interested in becoming part of the list, are kindly asked to contact the speakers.


The speakers represent the interests of the working group vis-á-vis the DGG. The speakers hold contact to the DGG board and inform the DGG general assembly about the activities of the working group, convene meetings and coordinate all other activities of the working group. The working group is chaired by Matthias Halisch and Matthias Bücker since October 2021.