Recent activities

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Recent activities

2015: September 28-30. Advanced Monitoring of Active Volcanoes Workshop. Observatorio Vesuviano, INGV, Naples,

The goal of the International meeting was to gather some experts in diferent fields of the volcanology in order to contribute to make a break point of Campi Flegrei activity and Vesuvio volcanic activity.
AMAV_International_meeting_2015.pdf

J. Zlotnicki gave and invited talk on:
Taal volcano in The Philippines: Understanding and monitoring.

2015: September 8-19. Visit to Lanzhou and Beijing (China).

The objectives were:
- To prepare the 2016 International EMSEV Workshop in Lanzhou and Beijing, to answer to the invitation of the Seismological Institute of Lanzhou and the Laboratory of Geophysics of Pekin University.
A memorandum of agreement was signed in Lanzhou Institute, and the first circular was edited

- To present two conference talks on EM phenomena

- To upgrade and update our joint bilateral EM network along Altyn Tag fault

2015: June 22 - July 1st. IUGG General Conference, Praques, Czech Republich.

Two joint sessions were organized by EMSEV
• JA5: Physical Processes Prior to and During Earthquakes, Reliability of Precursors (IAGA, IASPEI, IAVCEI)
Lead Convener: Elvira Astafyeva, Paris, France (IAGA), Co-conveners: Jacques Zlotnicki, Clermont Ferrand, France (IAVCEI), George Balasis, Athens, Greece (IAGA); Jan Blecki, Warsaw, Polad (IAGA); Malcolm Johnston, Menlo Park, USA (IASPEI); Valerio Tramutoli, Potenza, Italy (IASPEI); Takeshi Hashimoto, Sapporo, Japan (IAVCEI)
• JV3: Geophysical Imaging and Monitoring of Volcanoes (IAVCEI, IASPEI, IAGA)
Lead Convener: Jacques Zlotnicki, Clermont Ferrand, France (IAVCEI), Co-conveners: Yoichi Sasai, Shizuoka, Japan (IAGA); Malcolm Johnston, Menlo Park, USA (IASPEI); Gilda

J. Zlotnicki also presented several talks and was involved in some others:

J. Zlotnicki, 2015. Chair of IUGG session on volcanoes JV3. Geophysical Imaging and Monitoring of Volcanoes (IAVCEI, IASPEI, IAGA). Prague, Czech republic, June 22-July 2, 2015.
J. Zlotnicki, 2015. Co-Chair of IUGG session on volcanoes JA5. Physical Processes Prior to and During Earthquakes, Reliability of Precursors (IAGA, IASPEI, IAVCEI). Prague, Czech republic, June 22- July 2, 2015.
J. Zlotnicki, Y. Sasai, M. J. S. Johnston, 2015. The 2010 Seismovolcanic Crisis at Taal Volcano (Philippines). IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
B. Ladanivskyy, J. Zlotnicki, and V.Korepanov, 2015. Analyzing temporal changes by electromagnetic transfer functions at active volcanoes. IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
J. Zlotnicki, M. Uyeshima, Y. Sasai , 2015. Autopsy of the signatures of the electric field related to July 8, 2000 Miyakejima eruption (Japan). IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
T. Nagao, J. Zlotnicki, N. Sarlis, V. Bragin, E. Vorontsova, A. Rybin, P. Varotsos and S. Uyeda, 2015. EMSEV - RAS Bishkek Research Station cooperation on electrical and seismic phenomena in Kyrgyzstan: 2011-2014. IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
N.V. Sarlis, E.S. Skordas, P.A. Varotsos, T. Nagao, J. Zlotnicki, V. Bragin, E. Vorontsova, S. Uyeda, 2015. Towards the identification of pre-seismic electric signals of the VAN method in the geoelectric data collected by the joint EMSEV-Bishkek RS-RAS Cooperation. IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
J. Zlotnicki, G. Vargemezis, E. Strand, B. Hauge, A.L. Kjøniksen, P Yvetot, 2015. Geophysical surveys in Hessdalen valley (Norway): New light on Hessdalen lights. IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
E. Strand, B.G. Hauge, A.L. Kjøniksen ,J. Zlotnicki, G. Vargemezis, P. Yvetot, 2015. Overview of the transient luminous events in Hessdalen, Norway. IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
G. Currenti, J. Zlotnicki, R. Napoli, 2015. Magnetic signals related to volcanic activity: Application to March 1998 eruption at La Fournaise and to 2001 eruption at Mount Etna. IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.
J. Zlotnicki, J.L. Le Mouël, P. Morat, 2015. Electric and magnetic signatures associated with cylces of loading and unloading of a deep cavity. IUGG 2015, Prague, Czech republic, June 22-July 2, 2015.

J. Zlotnicki was re-elected as EMSEV Chairperson.
EMSEV is well recognized and supported by IUGG

Conférence Ecologie d'Avenir, Paris, 18 juin 2015. Conférence invitée.
Le thème développé s'intitulait:
Méthodes électriques à électromagnétiques: Comprendre pour prévoir.
(http://fondationecologiedavenir.org/Colloque_vegetal_planete/Jacques_Zlotnicki.htm).

2015: March 29 - April 2. EMSEV-BISHKEK RAS Workshop in Athens.

The workshop was focused on data processing and analyzing related to Fundamental problems on the earthquake generation processes and the way to monitor them for hazard mitigation.
The meeting was hosted by the Solid Earth Physics Institute, National and Kapodistrian University of Athens, Greece, March 29- April 2, 2015.

Circular_EMSEV_BishkekRAS_Athens_2015 _f.pdf

2015: March 25-29. Workshop on Hessdalen Luminous phenomena, University of Athens (Greece)

The workshop was devoted to the analysis and the understanding of the genesis of the transient luminous phenomena occurring in Hessdalen Valley in Norway.

Geophysical surveys in Hessdalen valley (Norway): New light on Hessdalen lights
J. Zlotnicki, G. Vargemezis, E. Strand, B. Hauge, A.L. Kjøniksen, P Yvetot

Hessdalen valley, in Norway, is a NS elongated valley (20 km x 10 km, 62°50’N, 11°12’E) in which a hundred of inhabitants are living. Since several decades, Østfold University College (http://www.hessdalen.org/) have inventoried transient luminous lights, called Hessdalen phenomena (‘HP’). They can appear in the low atmosphere, remain quite fixed, suddenly move up for suddenly disappearing. HP can be of different colours.
In Sept. 2014, first geophysical surveys were performed for rapidly detecting some electrical features. Due to the huge surface to cover (> 200 km2), the hardness of field, and the numerous lakes, Total Magnetic Field (TMF), Very Low Frequency (VLF), and Self-Potential (SP) surveys were first performed. About 28 km of profiles were measured with an interval of 10 to 50 m. First results show that:
- A large number of faults and a peculiar distribution characterizes the valley,
- Local high amplitude TMF anomalies, up to a few thousand of nT, are recognized. These anomalies may be due to lightning strikes or mineral deposits. Further experiments will clarify this,
- Most of the other anomalies do not exceed some hundred of nT,
- Where SP surveys were completed, SP anomalies can reach a few hundred of mV,
- A particular attention was done along a profile crossing the valley to the East where different mineral deposits are present. Mainly a topographic effect is recognized there,
- VLF surveys detected features of various properties. Conductive zones are attributed to possible faults filled with groundwater while intrusions of possible mineral deposits are also detected. Some VLF anomalies can be interpreted as lateral contacts between geological formations. Combined interpretation of VLF with TMF and SP clarifies the nature of the zones detected.

2014: Novembre. Obtention du Prix de Cartographie à l'Académie des Sciences de Paris

October 2014. Visit of Drs Sasai (Japan) and M.J.S. Johnston (USA).

The objective of the visit was to process data obtained on Taal volcano and to develop an interpretation of the 2010 seismo-volcanic crisis which lasted 9 months and has required to evacuated temporarily the volcanic Island during some weeks.

Summary

The study presents the observations made between 2007 and March 2011 of the electric and magnetic fields, ground temperature, seismicity and ground deformation. While the 2010 seismovolcanic crisis was preceded by unusual changes of several months duration in the electric and magnetic fields, the major signals were concomitant with the evolution of the crisis. Three periods of seismic activity from April 19 to August 4-8, August 4-8 to November 18, and November 18 to March, 2011, each followed by quiescence, modulate the crisis. Although only a single tiltmeter was in operation, it recorded three phases of deformation similar to those recognized in the seismic activity. Transient signals of some hours duration occur when activity changes abruptly, indicating the interconnectivity and communication of the fluids and sources in the hydrothermal system where phreatic explosions may be initiated. The results show that the activity on Taal can raise within a few weeks and induces deep and superficial sources of deformation, and consequently be at the origin of violent phreatic explosions.