Marine magnetic anomalies are continuous records of the history of geomagnetic field reversals preserved in oceanic crust over the past ~160 Myr. In addition, the shape of the magnetic anomalies depends on the effective inclinations of the external magnetic field vector I′0 and the remanent magnetization vector I′r can be numerically expressed by the skewness parameter θ=I′r+I′0−π . By determining the values of theta from magnetic profiles the inclination of the remanent magnetization can be found which leads to estimates of the contribution of the averaged non-dipole field. We investigated a series of closely spaced magnetic profiles intersecting the axis of the Carlsberg Ridge near the equator, and intersecting the axial anomaly region (Brunhes normal polarity chron C1n) and adjacent anomalies (subchron C2, Matuyama chron). The observed inclination anomaly near the equator can be viewed as an evidence of presence of the quadrupole component in the averaged non-dipole field.
Original languageEnglish
Title of host publicationProblems of Geocosmos–2018
Subtitle of host publicationProceedings of the XII International Conference and School
EditorsTB Yanovskaya, A Kosterov, NY Bobrov, AV Divin, AK Saraev, NV Zolotova
Place of PublicationCham
PublisherSpringer Nature
Pages165-177
Number of pages13
ISBN (Electronic)9783030217884
ISBN (Print)978-3-030-21787-7
DOIs
StatePublished - 2020
EventInternational Conference and School "Problems of Geocosmos" - St. Petersburg State University, Petergof, Russian Federation
Duration: 8 Oct 201812 Oct 2018
http://geo.phys.spbu.ru/geocosmos/

Publication series

NameSpringer Proceedings in Earth and Environmental Sciences
PublisherSPRINGER INTERNATIONAL PUBLISHING AG
ISSN (Print)2524-342X

Conference

ConferenceInternational Conference and School "Problems of Geocosmos"
Country/TerritoryRussian Federation
CityPetergof
Period8/10/1812/10/18
Internet address

    Research areas

  • Geomagnetic field, Marine magnetic anomalies, Non-dipole part, Paleomagnetism, SKEWNESS

ID: 51779972