Tsunamis are accompanied by variations of magnetic fields of the sea.

http://physicsworld.com/cws/article/news/2013/jun/28/tsunamis-could-be-spotted-from-magnetic-anomalies

Frantisek Nemec et al. have investigated radio wave signals

that can be observed when quakes take place.

https://www.researchgate.net/publication/238621640_Spacecraft_observations_of_electromagnetic_perturbations_connected_with_seismic_activity

Other literature:

http://www.youtube.com/watch?v=KKMTSDzU1Z4

http://www.technologyreview.com/view/424033/atmosphere-above-japan-heated-rapidly-before-m9-earthquake/

http://arxiv.org/abs/1105.2841

http://www.technologyreview.com/view/421958/spacecraft-saw-ulf-radio-emissions-over-haiti-before-january-quake/

http://arxiv.org/abs/1012.1533

http://engineering.illinois.edu/news/article/2011-07-13-tsunami-airglow-signature-could-lead-early-detection-system

http://spectrum.ieee.org/tech-talk/energy/environment/mystery-of-earthquake-lights-traced-to-electrical-charges-in-rocks

http://srl.geoscienceworld.org/content/85/1/159

http://news.stanford.edu/news/2013/june/quake-acoustics-tsunami-060413.html

http://www.eurekalert.org/pub_releases/2012-08/ssoa-hio073112.php

Regards,

Joachim

Article Spacecraft observations of electromagnetic perturbations con...

Look for the results of DEMETER and COMPASS-2 satellite missions, aiming at electromagnetic precursor signals of earthquakes, e.g.:

http://link.springer.com/chapter/10.1007/978-90-481-3212-6_4

Hello!

I am trying to convince the world, that not all, that You can measure with magnetometer, is really magnetic field. Not big success.

Any link for magnetic field measurements data, relative to the above question?

Thanks.

https://www.researchgate.net/publication/249529737_Ultra_low-frequency_electromagnetic_disturbances_appearing_before_strong_seismic_events?ev=prf_pub

Article Ultra low-frequency electromagnetic disturbances appearing b...

Fregoso-Becerra, E., and Garcia-Abdeslem, J., 2011, A possible seismomagnetic precursor of the El Mayor-Cucapah earthquake (Mw 7.2) of April 4, 2010, Baja California, México: Geofísica internacional, v. 50, no. 2, p. 211–225.

While satellite data such as those acquired by DEMETER are extremely valuable, they naturally suffer from the fact that the satellite-borne sensor is far above the source, typically about 700 km. Much better are ground station data. Pre-earthquake fluctuations in the total magnetic field intensity and in the horizontal and vertical components have been observed many many times. The 8-station network in Taiwan, which started to operate around 1988, recorded total field variations up to 250 nT in amplitude weeks before the M=7.6 Chi-Chi earthquake of 1999. There are numerous high-quality papers out. We looked that these B field variations with the idea in mind that they must arise from large telluric currents that are a part of the pre-earthquake conditions: Freund, F., and S. Pilorz (2012), Electric Currents in the Earth Crust and the Generation of Pre-Earthquake ULF Signals, in Frontier of Earthquake Prediction Studies, edited by M. Hayakawa, pp. 464-508, Nippon Shuppan, Tokyo.

Another source: QuakeFinder's worldwide 150+ station network of ULF triaxial search coil magnetometers has measured the intensity of pre-earthquake ULF waves many times. An excellent example was the M=5.6 Alum Rock in California, where by chance the ULF station was almost exactly above the hypocenter. From the ULF amplitudes, about 20-30 nT, we calculated a horizontal telluric current at 10 km depth of more than 10,000 amps but less than 100,000 amps. See: Bortnik, J., T. E. Bleier, C. Dunson, and F. Freund (2010), Estimating the seismotelluric current required for observable electromagnetic ground signals, Ann. Geophys., 28, 1615–1624.

Fantastic information, thank you very much.

If you need reprints, send me an email to [email protected]

Ok, one of the first works

Moore G.W. Magnetic Disturbances preceding the 1964 Alaska Earthquake // Nature. 1964. V. 203. Iss. 4944. P. 508 509. doi:10.1038/203508b0

http;//dx.doi.org/10.1038/203508b0

Multi-parameteric Geophysical Observatory (MPGO) Ghuttu, India is an attempt for studying earthquake precursory signatures. from the last nine year of its operation, we are sure that seismo-magnetic signatures before earthquake exist in NW Himalaya. However, detection of it is a matter of location of measuring sensors with respect to epicenter and earthquake parameters.

following are some papers we have published yet and more are in progress.

1. F Dudkin,Gautam Rawat, B.R.Arora, V. Koreponov, O. Leonteyav and A.K.Sharma (2010) Application of Polarization ellipse technique for analysis of ULF magnetic fields from two distant stations in Koyna-Warna seismoactive region, west India.

Natural Hazards and Earth System Science (NHESS) V10,1513-1522

Doi: 10.5194/nhess-10-1513-2010

2. Arora, B.R., Choubey, V.M., Naresh Kumar and Gautam Rawat. 2011. Multi-Parameter Geophysical Observatory: Initiative for Integrated Earthquake Precursory Research, Invited contributions to proceedings of National Conference on "Geosciences and Water Resources for Sustainable Development" Department of Geophysics, Andhra Univ. Feb 11-12, 2011, pp 6-16.

3. Arora, B.R., Rawat, Gautam., Mishra, S. S., "Indexing of ULF Electromagnetic Emission to Search Earthquake Precursors", in "The Frontier of Earthquake Prediction Studies", Ed. by M. Hayakawa, Nihon-senmontosho-Shuppan, Tokyo, pp346-362, 2012.

4. Rawat, Gautam., “Characteristic ULF band magnetic field variations at MPGO, Ghuttu for the 20 June 2011 earthquake in Garhwal Himalaya” , Current Science, 88-93,2014

Katsumi Hattori ULF Geomagnetic Changes Associated with Large Earthquakes, TAO, Vol. 15, No. 3, 329-360, September 2004

For Articles on Earthquakes, I look at NEW CONCEPTS IN

GLOBAL TECTONICS, found thru a GOOGLE Search.

a paper on unipolar pulses observed prior to earthquakes:

Article Pre-earthquake Magnetic Pulses

There is an article in the latest ( March 2014 ) issue of the New Concepts

In Global Tectonics that indicates that aircraft flying over a location

that will soon have an Earthquake experience the disengagements

of autopilots, and dramatic shifts in the communication frequencies

such that the aircraft can not contact the airports. The shift in frequencies

increases and peaks within days or hours of the Earthquake.

There is also some sort of atmospheric haze, or fog that can

obscure vision, and a dramatic rise in the temperature of the

land, sea, and air, as if an intense High pressure Zone is

occurring above the future epicenter.

New Concepts in Global Tectonics seems to be concentrating

on articles about Earthquakes, frequency, and Prediction based

on cyclical re-occurrences of EarthQuakes in locations that

have historically been prone to repeat earthquakes.

GOOGLE it, and click on issues.

Robin Hello

A short review of magnetic precursors before the geodynamic events at a depth and proposed methodology for unmasking the precusors is given in

Finkelstein, M., Price, C. and Eppelbaum, L., 2012. Is the geodynamic process in preparation of strong earthquakes reflected in the geomagnetic field? Journal of Geophysics and Engineering, 9, 585-594.

You can find this article in the ResearchGate.

Best

Lev

Lev,

In 1989 Professor Horng-Yuan Yen on the National Central University had installed a network of magnetometer stations across Taiwan, He was interested in the regional magnetic field and took data only every 10 min. Despite this breathtakingly slow data acquisition rate, as the Sep 21, 1999 magnitude 7.6 Chi-Chi event approached, this network recorded some amazing data. Apparently changes in the regional magnetic field started to show up three years before the event. Closer to the date the telluric currents started to fluctuate wildly with excursions up to 250 nT strong, which exhibit a remarkable pattern that can be correlated to the local strain field as reflected by the local seismicity across the island,  Though I am a novice in geomagnetism I included a rather detailed description of these data in a book chapter for one of Masashi Hayakawa's books. Attached. You'll find this towards the end of this rather lengthy text.

Best

Friedemann

Data FF & Pilorz Hayakawa book chapter 2012