Unexpected Southern Hemisphere ionospheric response to geomagnetic storm of 15 August 2015

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F18%3A00486122" target="_blank" >RIV/68378289:_____/18:00486122 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.5194/angeo-36-71-2018" target="_blank" >http://dx.doi.org/10.5194/angeo-36-71-2018</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/angeo-36-71-2018" target="_blank" >10.5194/angeo-36-71-2018</a>

Result language

angličtina

Original language name

Unexpected Southern Hemisphere ionospheric response to geomagnetic storm of 15 August 2015

Original language description

Geomagnetic storms are the most pronounced phenomenon of space weather. When studying ionospheric response to a storm of 15 August 2015, an unexpected phenomenon was observed at higher middle latitudes of the Southern Hemisphere. This phenomenon was a localized total electron content (TEC) enhancement (LTE) in the form of two separated plumes, which peaked southward of South Africa. The plumes were first observed at 05:00UT near the southwestern coast of Australia. The southern plume was associated with local time slightly after noontime (1- 2h after local noon). The plumes moved with the Sun. They peaked near 13:00 UT southward of South Africa. The southern plume kept constant geomagnetic latitude (63-64oS), it persisted for about 10h, whereas the northern plume persisted for about 2h more. Both plumes disappeared over the South Atlantic Ocean. No similar LTE event was observed during the prolonged solar activity minimum period of 2006-2009. In 2012-2016 we detected altogether 26 LTEs and all of them were associated with the southward excursion of Bz. The negative Bz excursion is a necessary but not sufficient condition for the LTE occurrence as during some geomagnetic storms associated with negative Bz excursions the LTE events did not appear.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10509 - Meteorology and atmospheric sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Annales Geophysicae

ISSN

0992-7689

e-ISSN

—

Volume of the periodical

36

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

71-79

UT code for WoS article

000423022100001

EID of the result in the Scopus database

2-s2.0-85040924059