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


  • 05/12/2023 Invitation to the first IP Summer School from 4 to 8 September in Grubenhagen

    We invite all interested students and PhD students to participate in the first Summer School on Induced Polarization. The Summer School will take place from September 4 to 8, 2023 at the LIAG facilities in Grubenhagen near Einbeck. Detailed and up-to-date information about the workshop is available upon request to the two speakers of the working group.

  • 01/05/2032 Next international IP workshop 2024 in Sweden

    The next international IP workshop will take place in 2024 in Lund, Sweden. This was the result of a vote within the international community after the last workshop in Annecy. The exact date will be announced here as soon as it is fixed.

  • 11/17/2022 Next national IP workshop in Kassel

    The next national IP workshop will take place on October 4 and 5, 2023 in Kassel – organized by Adrian Mellage’s working group. Directly afterwards, on October 5 and 6, a networking meeting for young IP enthusiasts will take place.

  • 10/10/2022 New international women’s network within the IP community

    After the IP workshop in Annecy, an initiative started for a women’s network within the IP community. The founders want to give room for conversation about topics related to being a woman within the IP community, to learn from each other, and strengthen networks. A kick-off meeting took place on October 24, 2022. The network is open to all women from students to professors. If you’re interested to join, please contact Cora Strobel (cora.strobel@uni-tuebingen.de).

  • 30/06/2022 6th International Workshop on Induced Polarization in Annecy

    The International IP Workshop 2022 took place in Annecy, France from June 27 through 30. With 29 talks and 25 poster contributions, a total of 78 participants from 13 countries started an intensive exchange. A group photo and information on the contributions can be found on the workshop website : https://sites.google.com/view/ipworkshop6/home
    Andreas Weller (TU Clausthal) was honored on the occasion of his imminent retirement. The international community acknowledges his pioneering work in the field of induced polarization.


  • Development and maintenance of a (S)IP data base (M. Halisch)
  • The working group logo package can be downloaded here.
  • List of existing IP instruments in Germany (M. Halisch)
  • 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).

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.