[Rockhounds] Earthquake Swarm Hits World’s Largest Volcano

[Doug Bank]

Having only gone partway up that mountain, I think they probably would be more worried about wind than tremors. As a photographer, though, you certainly would prefer that everything is super steady. 

I do appreciate your point about a few seconds of vibration during a lengthly exposure. I kind of assume the same thing when I take a 30 second exposure of fluorescent rocks, but it can affect the sharpness of the image.

Doug

> On Apr 3, 2021, at 5:12 PM, Axel Emmermann <axel.emmermann at telenet.be> wrote:
> 
> If I was asked to design a telescope on a place like that, it would float on oil, and have tremor-proof  dampeners.
> I don't know how they actually did it but I think they probably have that covered, Linda 😉
> 
> Cheers
> Axel
> 
> 
> -----Oorspronkelijk bericht-----
> Van: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> Namens linda at middleearthminerals.com
> Verzonden: zaterdag 3 april 2021 21:39
> Aan: 'Rockhounds at drizzle.com: A mailing list for rock and gem collectors' <rockhounds at rockhounds.drizzle.com>
> Onderwerp: Re: [Rockhounds] Earthquake Swarm Hits World’s Largest Volcano
> 
> I wonder if those long-exposure photos made through the telescopes are messed up when an earthquake rumbles through?  Perhaps not, because by definition, the long exposure means they're only gathering a few photons at a time, and if the earthquake moves the telescopes for a few seconds out of many minutes, a few stray photons might not matter?  Obviously, just guessing, so if someone else knows, please enlighten (yes, pun intended) me!
> 
> -----Original Message-----
> From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> On Behalf Of Kreigh Tomaszewski
> Sent: Saturday, April 3, 2021 12:33 PM
> To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors <rockhounds at rockhounds.drizzle.com>
> Subject: Re: [Rockhounds] Earthquake Swarm Hits World’s Largest Volcano
> 
> Mauna Kea is about 35 miles from Mauna Loa, with a big valley between them.
> 
> On Sat, Apr 3, 2021 at 2:07 PM Tim Fisher <nospam at orerockon.com> wrote:
> 
>> Isn't that dangerously close to the Mauna Kea telescopes? I don't see 
>> anything mentioning them.
>> 
>> Tim Fisher
>> Http://OreRockOn.com
>> Email nospam at orerockon.com
>> 
>> 
>> 
>> -----Original Message-----
>> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On 
>> Behalf Of Kreigh Tomaszewski
>> Sent: Wednesday, March 31, 2021 6:41 PM
>> To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
>> Subject: [Rockhounds] Earthquake Swarm Hits World’s Largest Volcano
>> 
>> An earthquake swarm continues on Mauna Loa, known as the world’s 
>> largest active volcano. While nearby smaller Kilauea Volcano is 
>> erupting, Mauna Loa is not yet at this time. But that could change with time.
>> 
>> Beginning at 2:30 am HT on March 29, 2021, the U.S. Geological 
>> Survey’s
>> (USGS)  Hawaiian Volcano Observatory (HVO)  recorded over 130 
>> earthquakes beneath the northwest side of Mauna Loa’s summit, about  26 miles west
>> northwest of the town of Volcano, Hawaii.   According to HVO, most of these
>> earthquakes are occurring in a cluster about  1 mile  wide and  3.5–5 
>> miles below the surface.
>> 
>> The swarm continues this morning, with a 2.6 earthquake recorded in 
>> Pahala at 2:03 am HT.
>> 
>> The largest event in the sequence, so far, was a magnitude-2.7 
>> earthquake, with the bulk of the events being less than magnitude-2.
>> Only one event was reported felt by a resident and was described as 
>> weak shaking with a maximum Intensity of II on the Modified Mercalli 
>> Intensity Scale.
>> 
>> https://weatherboy.com/earthquake-swarm-hits-worlds-largest-volcano/