Daily ULF Plots

Geomagnetic pulsations are short period (usually of the order of seconds or minutes) fluctuations of the Earth’s magnetic field. The pulsation frequencies are lower than the natural frequencies of the plasma, such as the plasma frequency, ωp, and the ion gyrofrequency, ωgi. Such waves are referred to as ultra low frequency (ULF) waves. They are transitory variations with a small amplitude and leave no permanent effects on the field. Like longer period disturbances, such as magnetic storms, the energy that drives them is of solar origin, in contrast to the Earth’s main field and secular variations which are of internal origin. UNH and its collaborators use search coil magnetometers for the study of magnetosphere-ionosphere coupling and its relationship with auroral phenomena.

The maps below show locations of search coil magnetometers. UNH hosts plots and data for the stations listed below. The interface at the top of this page can be used to navigate through daily plots. Data is available in CDF format here 

Antarctic Stations full image                                    Arctic Stations full image

NAL>Ny-Alesund lat = '78.5540 N' lon = '11.5580 E'
LYR>Longyearbyen lat = '78.0886 N' lon = '16.0242 E'
HOR>Hornsund lat = '77.0035 N' lon = '15.3277 E'
ISR>Isfjord Radio lat = '78.0366 N' lon = '13.3823 E'
SDY>Sondrestrom lat = '66.5916 N' lon = '50.568 W'
IQA>Iqaluit lat = '63.4537 N' lon = '68.3065 W'
SNK>Sanikiluaq lat = '56.3218 N' lon = '79.1387 W'
MCM>McMurdo lat = '77.85 S' lon = '166.67 E'
SPA>South Pole lat = '90.0000 S' lon = '00. W'
JBS>Jang Bogo Station lat = '76.6 S' lon = '164.2 E'
VNA>Neumayer lat = '70.67 S' lon = '8.25 W'
HAL>Halley Station lat = '75.5 S' lon = '26.6 W'
PG2>AAL-PIP PG2 lat = '84.42 S' lon = '57.96'
PG3>AAL-PIP PG3 lat = '84.81 S' lon = '37.63'
PG4>AAL-PIP PG4 lat = '83.34 S' lon = '12.25'
PG5>AAL-PIP PG5 lat = '81.96 S' lon = '5.71'

The VNA MICA-S induction coil magnetometer data is owned by a consortium of KHU, NHU, NJIT, AWI, GFZ. In the spirit of collaboration, shared research and co-authorship is strongly encouraged. The data is openly available, please acknowledge: The MICA-S induction coil magnetometer data at VNA is provided by KHU (lead institute, Korea), NHU and NJIT (USA) and AWI and GFZ (Germany) through http://mirl.unh.edu/ulf_status.html.

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Last modified: Thursday Sep 9 2019