La Palma, Canary Islands - Volcano Thread

The planet rotates at a rate of 1 degree for every 4 minutes or 15 degrees for each 60 minutes.

The Canaries are almost 17 degrees West of the Greenwich meridian and therefore about 11 degrees West of Dublin corresponding to 44 minutes later for sunrise. As the Canaries rotates rapidly out of the dark hemisphere of the Earth compared to the slower latitudinal velocity of Dublin, the transition from darkness to daylight is much more rapid on the Canaries compared to the long drawn out dawn at our latitudes.

When the 17th century Royal Society academics and the experimental theorists decided to shift the rotation away from the stationary/central Sun and towards the daily change in position of the stars instead, they set in motion a divergence between cause and effect including the relationship between one rotation and one 24 hour day/night cycle-

" It is a fact not generally known that, owing to the difference between solar and sidereal time, the Earth rotates upon its axis once more often than there are [24 hour] days in the year" NASA /Harvard

It is why nobody can discuss the links between planetary motions and evolutionary geology (earthquakes, plate tectonics, volcanoes, spherical deviation), planetary motions and climate, planetary motions and differences in twilight lengths and multiple other topics of productive and creative research.

You are out of your depth so go back to your timekeeping over temperatures graph warfare (climate change modelling).

Timekeeping and that includes the Lat/Long system is based on the rotation of the Earth at a rate of 1 degrees per 4 minutes with each rotation anchored to the sunrise/noon/sunset cycle. Each degree West sees the Sun appear 4 minutes later, regardless of time zones for that, like DST, represents the flexibility of timekeeping along with the Lat/Long system.

Dublin lost its own time zone exactly 105 years ago on October 1st 1916 or the 25 minute difference representing roughly 6 degrees West of Greenwich. It is why the Canaries will always be 44 minutes later in being 11 degrees West of Dublin even when dawn/twilight lengths vary due to different rotational velocities.

For too long people rush in without the slightest regard for the physical considerations involved so if I find myself arguing with modelling enthusiasts who firmly believe the Earth doesn't turn once each day/night cycle, I prefer to ignore you and any others who can't affirm basic cause and effect.

In any case, planetary comparisons between the dynamical traits of Venus and the Earth in terms of geological evolution require accurate rotational velocities across latitudes and that involves less hysterical people who can handle the emergence of the true values. I am sure whatever petty moderator decided to block linked websites must observe with glee but I can't answer to that.

Maybe I should have stated that, based on the rotation rate of 1 degree for every 4 minutes, the Sun comes into view 44 minutes later, along the same longitude line as Dublin insofar as Dublin is 6 degrees West of Greenwich while the Canary islands are 17 degrees West.

He drew attention to a necessary correction and fair dues to him for that notwithstanding, it still requires the correct rotational velocities which connect the 24 hour system with the Lat/Long system through the Earth geography and rotational characteristics.

As for your uninteresting reaction, seen it all before.

Really lovely to see a reasonable conversation with plenty of observations and thanks.

The rotational velocity at La Palma is about 910 mph while it is 620 mph at the latitude of Dublin so that the transition from darkness to daylight is far more rapid on the Canary islands than on the island of Ireland. It explains some of the issues brought up here and although it is well two decades since I first explained it, the current expression based on the angle of the Sun still remains.

Rotation is built into many Earth sciences from biology to climate to evolutionary geology hence the importance of the topic so many here have fought against for so long.