Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

In message , Warner Losh writes: >what about the effects of glacial melt? Can LOD changes be tied to that? I did some math on that long time ago, and got a negative. *) The ice is quite close to the axis of rotation

Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

On Sat, Nov 14, 2015 at 12:47 AM, Steve Allen wrote: > On Tue 2015-11-10T11:37:10 -0700, Rob Seaman hath writ: > > Major earthquakes have been reported to have a detectable effect, > > but only at the level of a microsecond glitch, right? > > The calculated changes in LOD due

Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

On Tue 2015-11-10T11:37:10 -0700, Rob Seaman hath writ: > Major earthquakes have been reported to have a detectable effect, > but only at the level of a microsecond glitch, right? The calculated changes in LOD due to earthquakes reported in the news have been smaller than the typical variations

Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

On Nov 9, 2015, at 12:18 AM, Poul-Henning Kamp wrote: > In message <20151109025137.a95a8406...@ip-64-139-1-69.sjc.megapath.net>, Hal > Murray writes: > >> Was there a geological incident that explains things? > > We don't know, but the period had other pecularities, for

Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

>> We don't know, but the period had other pecularities, for instance >>almost statistically significant level of vulcanism. >“Almost statistically significant” is like “a little bit not pregnant” ;-) Indeed. That's why I stressed the uncertainty. The original paper is here:

Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

Hi Steve, I just wanted to compliment you on the huge about of work in these pages. Its a fantastic collection of facts and your explanations and commentary are extremely helpful. Well done and thank you. -Brooks On 2015-11-08 10:15 PM, Steve Allen wrote: On Sun 2015-11-08T18:51:37 -0800,

[LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

There is a nice graph here: http://hpiers.obspm.fr/eop-pc/earthor/utc/leapsecond.html Was there a geological incident that explains things? We didn't have any leap seconds for 7 years. From the leap second file: 3124137600 32 # 1 Jan 1999 3345062400 33 # 1 Jan 2006

Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

On Sun 2015-11-08T18:51:37 -0800, Hal Murray hath writ: > Was there a geological incident that explains things? The crust of the earth has accelerated its rate of rotation during most of the past 100 years. The slowest rotation ever was around 1912, and since then it has been rotating faster.

Re: [LEAPSECS] What happened in the late 1990s to slow the rate of leap seconds?

In message <20151109025137.a95a8406...@ip-64-139-1-69.sjc.megapath.net>, Hal Murray write s: >There is a nice graph here: > http://hpiers.obspm.fr/eop-pc/earthor/utc/leapsecond.html > >Was there a geological incident that explains things? We don't know, but the period had other