The Kaverina diagram used to display different tectonic regimes as defined by different styles of faulting has been modified by the addition of focal mechanism ‘beach-balls’. How helpful is that?
The last twelve months have not been kind to Croatia, thanks to the jostling of crustal blocks for space as the northern edge of Africa advances relentlessly towards Europe.
In May 2018, something very curious happened. The marine area immediately to the east of Mayotte, the easternmost major island in the Comoros chain, became seismically active.
The leading article in the November 19 issue of Eos was entitled “By Land or Sea: How Did Mammals Get to the Caribbean Islands?” Could gravity maps have anything to tell us about the possibilities?
In an ideal world, there would be a continuous dialogue between geologists and geophysicists. Sadly, there seems to have been little progress in that direction in the last fifty years.
Gravity units are a mess. About half of all surveys have their results reported in the c,g,s unit, the mGal, and half in the S.I unit, which differs by a factor of ten. And very few people have any idea of why the Eötvös unit is defined in the way that it is.