On 8/14/2012 5:12 PM, Gary Gibson wrote:
> There were two very deep (~600km) Mw 7.7 events a few minutes apart 
> south of Fiji on 2002-08-19 at 1101 and 1108, and an Mw 7.7 in the Sea 
> of Okhotsk on 2008-07-07 at 0212. On 2005-06-13 2244 there was an Mw 
> 7.8 at depth 115 km in Northern Chile. All other events of magnitude 
> 7.7 or larger since 2000 have been shallower than 100 km.
>
> Cheers,
> Gary
>
>
> On 2012-08-15, at 05:17 , Thomas Dick  > wrote:
>
>> On 8/14/2012 11:18 AM, Dave Nelson wrote:
>>> If you look at  my force balance  instrument traces on the PSN 
>>> current seismicity web site you will see long period signals in the 
>>> few hours after the event. Theses are the whole earth or earth 
>>> normal modes which were excited by the event.
>>> The instrument long period corner is 50 seconds and the motion is at 
>>> significantly longer periods but the motion is so  large the 
>>> instrument response is sufficient to provide a nice display.  My 
>>> Trillium Compact with its 120 second corner is much better but it is 
>>> not an amateur class instrument.
>>> I have made a spectrum in Winquake and the individual modes are 
>>> quite apparent and individually identifiable.
>>> Interesting stuff !!
>> Without going back and looking, I believe this is the largest deep 
>> quake in the last ten years....anyone know better?
>
Yes, Gary, I do remember the Fiji quakes now that you mention it. I 
didn't remember the July 7, 21008 Sea of Okhotsk. And Gary, I also 
recorded waves for over two hours on all instruments.

  
    
  
  
    
On 8/14/2012 5:12 PM, Gary Gibson
      wrote:

    
    

      
      There were two very deep (~600km) Mw 7.7 events a few minutes
      apart south of Fiji on 2002-08-19 at 1101 and 1108, and an Mw 7.7
      in the Sea of Okhotsk on 2008-07-07 at 0212. On 2005-06-13 2244
      there was an Mw 7.8 at depth 115 km in Northern Chile. All other
      events of magnitude 7.7 or larger since 2000 have been shallower
      than 100 km.
      


      
      
Cheers,
      
Gary
      


      
      


        

          
On 2012-08-15, at 05:17 , Thomas Dick <dickthomas01@.............>
            wrote:
          

          

            
            

              
On 8/14/2012 11:18 AM, Dave
                Nelson wrote:

              
              

                
                
                
If you look at  my
                    force balance  instrument traces on the PSN current
                    seismicity web site you will see long period signals
                    in the few hours after the event. Theses are the
                    whole earth or earth normal modes which were excited
                    by the event.
                
 
                
The instrument long
                    period corner is 50 seconds and the motion is at
                    significantly longer periods but the motion is so
                     large the instrument response is sufficient to
                    provide a nice display.  My Trillium Compact with
                    its 120 second corner is much better but it is not
                    an amateur class instrument. 
                
 
                
I have made a spectrum
                    in Winquake and the individual modes are quite
                    apparent and individually identifiable.
                
 
                
Interesting stuff !!   
              
              Without going back and looking, I believe this is the
              largest deep quake in the last ten years....anyone know
              better?

            
          
        
        

      
    
    Yes, Gary, I do remember the Fiji quakes now that you mention it. I
    didn't remember the July 7, 21008 Sea of Okhotsk. And Gary, I also
    recorded waves for over two hours on all instruments.