scholarly journals The strength of the Earth’s magnetic field from Pre-Pottery to Pottery Neolithic, Jordan

2021 ◽  
Vol 118 (34) ◽  
pp. e2100995118
Author(s):  
Anita Di Chiara ◽  
Lisa Tauxe ◽  
Thomas E. Levy ◽  
Mohammad Najjar ◽  
Fabio Florindo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dipole Moments ◽  
Ancient Egypt ◽  
Archaeological Sites ◽  
Reference Curve ◽  
Earth’S Magnetic Field ◽  
Short Term ◽  
The Past ◽  
Earth's Magnetic Field ◽  
Geological Formations

Constraining secular variation of the Earth’s magnetic field strength in the past is fundamental to understanding short-term processes of the geodynamo. Such records also constitute a powerful and independent dating tool for archaeological sites and geological formations. In this study, we present 11 robust archaeointensity results from Pre-Pottery to Pottery Neolithic Jordan that are based on both clay and flint (chert) artifacts. Two of these results constitute the oldest archaeointensity data for the entire Levant, ancient Egypt, Turkey, and Mesopotamia, extending the archaeomagnetic reference curve for the Holocene. Virtual Axial Dipole Moments (VADMs) show that the Earth’s magnetic field in the Southern Levant was weak (about two-thirds the present field) at around 7600 BCE, recovering its strength to greater than the present field around 7000 BCE, and gradually weakening again around 5200 BCE. In addition, successful results obtained from burnt flint demonstrate the potential of this very common, and yet rarely used, material in archaeomagnetic research, in particular for prehistoric periods from the first use of fire to the invention of pottery.

The strength of the Earth’s magnetic field from Pre-Pottery to Pottery Neolithic, Jordan

2021 ◽  
Author(s):  
Anita Di Chiara ◽  
Lisa Tauxe ◽  
Thomas Levy ◽  
Mohammand Najjar ◽  
Fabio Florindo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dipole Moments ◽  
Ancient Egypt ◽  
Archaeological Sites ◽  
Southern Levant ◽  
Short Term ◽  
The Past ◽  
The Earth ◽  
Secular Variations ◽  
Geological Formations

<p>Constraining the secular variations of the Earth’s magnetic field strength in the past is fundamental to understanding short term processes of the geodynamo. Such records constitute a powerful and independent dating tool for archaeological sites and geological formations. In this study, we present 10 new and robust archaeointensity results from Pre-Pottery to Pottery Neolithic and, for one of the first times, flint (burnt chert) from Jordan. Two of these results constitute the oldest archaeointensity data for the entire Levant, ancient Egypt and Mesopotamia extending the archaeomagnetic dating reference for the Holocene. Virtual Axial Dipole Moments (VADM)s show that the Earth’s magnetic field in the Southern Levant was weak (about half the present field) at around 7,600 years BCE, recovering its strength to greater than the present field around 7,100 BCE and gradually weakening again around 5,200 years BCE. In addition, successful results obtained from burnt flint demonstrate the potential of this rarely used material in archaeomagnetic research, in particular for prehistoric periods from the first use of fire to the invention of pottery.</p>

An analysis of rock magnetic data

1960 ◽  
Vol 256 (1286) ◽  
pp. 291-322 ◽  
Keyword(s):  
Magnetic Field ◽  
Continental Drift ◽  
Magnetic Data ◽  
Rotational Axis ◽  
Earth’S Magnetic Field ◽  
Geological Time ◽  
The Past ◽  
Geological Processes ◽  
Minimum Number ◽  
Earth's Magnetic Field

The data obtained from numerous palaeomagnetic measurements made during the past decade have shown that while the geologically younger rock formations are magnetized in directions close to that of the present earth’s magnetic field, the remanent magnetic polarizations of older rocks depart markedly from this pattern. These observations are widely held by many workers to suggest that the main continental land masses have undergone movements relative to one another during the past. The present paper gives an account of a new analysis of the available data, making a minimum number of theoretical assumptions about the ways in which the rocks became magnetized and about the origin of the geomagnetic field. The results of this analysis strongly support the supposition that the observed wide divergence between the directions of the remanent magnetic vectors of older rocks and that of the present earth’s field is systematic, and not a result of purely random processes occurring throughout geological time. The most reasonable explanations of the phenomenon appear to be that ( a ) the directions of magnetization of the earlier rocks have been changed by some widespread physical or geological processes since the time of their formation, ( b ) the earth’s magnetic field has had strong multipolar components in past geological ages, ( c ) a relative drift of the continents across the earth’s mantle has occurred. Of these hypotheses, ( c ) appears to be the most plausible. On the tentative assumption that the rock magnetic results can be explained by continental drift, it is possible to estimate the ancient latitude and the orientation relative to the earth’s rotational axis, of each continent, although by palaeomagnetic measurements alone changes in relative longitude cannot be revealed.

The intensity of the Earth's magnetic field over the past 160 million years

Nature ◽  
10.1038/29746 ◽  
1998 ◽  
Vol 394 (6696) ◽  
pp. 878-881 ◽  
Author(s):  
M. T. Juárez ◽  
L. Tauxe ◽  
J. S. Gee ◽  
T. Pick
Keyword(s):  
Magnetic Field ◽  
Earth’S Magnetic Field ◽  
The Past ◽  
Earth's Magnetic Field

scholarly journals NEW INTERPRETATION OF THE EARTH’S MAGNETIC FIELD EFFECTS’ ON LIFE

2020 ◽  
Vol 53 (2C) ◽  
pp. 13-25
Author(s):  
Basim Hijab
Keyword(s):  
Magnetic Field ◽  
Influenza Pandemic ◽  
Magnetic Anomalies ◽  
Magnetic Field Effects ◽  
Earth’S Magnetic Field ◽  
The Past ◽  
Earth's Magnetic Field ◽  
New Interpretation ◽  
Influenza Outbreaks ◽  
Clear Relation

The relationships of the Earth’s magnetic field intensity and time (the past 320 years) for many locations around the world are obtained, based on the IGRF-13 mathematical model. The results showed that each location on the earth surface has its magnetic intensity relation with time that reflects local variations. The sudden changes (magnetic anomalies) in the Earth’s magnetic field with time are natural phenomena, which are different from place to another. These magnetic anomalies are investigated for possible relationship to the historical records of the influenza pandemic outbreaks. The results showed clear congruences between the Earth’s magnetic anomalies and influenza outbreaks times. The congruences become clearer when comparing the highest magnetic anomaly intensity and the first outbreak location of the influenza pandemic. This is true for the recorded historical data since 1890 AD. It is not known how the changes in Earth’s magnetic field affect the virus’s outbreaks or evolution, but there is a clear relation that needs detailed studies.

The intensity of the earth's magnetic field in the past derived from the archaeomagnetic data

1972 ◽  
Vol 16 (4) ◽  
pp. 407-410
Author(s):  
S. P. Burlatskaya ◽  
Václav Bucha ◽  
A. Janáčková
Keyword(s):  
Magnetic Field ◽  
Earth’S Magnetic Field ◽  
The Past ◽  
Earth's Magnetic Field
Sign in / Sign up

Export Citation Format

Share Document