Quake Watch 2015

originally posted by: dreamfox1
I post this because were it happened.

earthquake.usgs.gov...

M4.4 - 247km W of Crescent City, California

Time
2015-08-14 06:41:32 (UTC)
2015-08-13 23:41:32 (UTC-07:00) in your timezone
Times in other timezones
Nearby Cities
247km (153mi) W of Crescent City, California
253km (157mi) WNW of Eureka, California
255km (158mi) W of McKinleyville, California
258km (160mi) WNW of Arcata, California
522km (324mi) SW of Salem, Oregon


Fears grow as seismologists warn massive earthquake could hit US northwest coast within 50 years

www.news.com.au... 6frflp0-1227444075836


7.9 Earthquake in California predicted by proven and validated SOURCE * lead-in to volcanic activity

www.abovetopsecret.com...


What are the odds a giant earthquake will devastate Seattle? Experts weigh in.

www.vox.com...


ENVIRONMENT
An Epic Earthquake Is Predicted to Hit the Pacific Northwest — and It’s Totally Terrifying

www.alternet.org...


Is West Coast ready for next big quake?

www.cnn.com...


FEMA official warns: “[…] everything west of Interstate 5 will be toast”, massive natural disaster coming


www.intellihub.com...

Man, I don't know... All of the recent significant quakes were between 6.0-7.2 (and some of them myseriously downgraded rarely you see an upgrade).

I think people tend to forget that the strongest Earthquake this year so far was a 8.5 and it came out of nowhere. They were very lucky that it was very deep.

No doubt this could happen again at a more shallow level in my opinion when people least expect it.

another off QLD, AU. www.abc.net.au...

Offshore E of Fraser Island, QLD.
Magnitude: 4.0 (ML)
Depth: 10 km
Tsunamigenic: No

Date and Time
UTC: 14 August 2015 @ 01:06:55
Sydney Time: 14 August 2015 @ 11:06:55 (AEST)

Location
Coordinates: -25.431, 154.309
www.ga.gov.au...

originally posted by: Eagleyedobserver

I think people tend to forget that the strongest Earthquake this year so far was a 8.5 and it came out of nowhere. They were very lucky that it was very deep.

Oh yeah? where was that?
The largest quake this year (or even in the last 12 months) was a 7.9 at the Bonin Islands
significantearthquakes.blogspot.co.nz...

a reply to: muzzy

I think thats the one I'm talking about. It was initially 8.5 on multiple sites and then 'Downgraded' and it was very deep.

The problem we have we'll never find out what quakes are downgraded for a reason. Measurements can be inaccurate. OK.
But why is it only rarely the other way around? It makes no sense at all unless the sensors are somehow calibrated in a comically over sensitive way which would make even less sense because their goal is to receive accurate measurements. no?

it's really worth it to be sceptical about certain things. So here's your answer...

Edit: I'm not saying it was 8.5 (i'm not god sorry about that) but thats the number that sticks in my brain.

It's not that they upgrade or downgrade, it is that they change the magnitude type.
Initially when USGS post a quake it is usually mb, and you will find that the mb never changes.
They try to end up with a Mw, there are 4 types of Mw; Mww, Mwp, Mwc, Mwb
types of magnitude
That Bonin Is. quake had a Me reading of;
Me_hf (high frequency) of 8.66 or Me_bb (broadband) 8.28
ds.iris.edu...
Me is the measurement of radiated energy released, and is almost always higher than any of the other readings, but not always.

But the whole point is you have to try and standardize things so that you can compare apples with apples, quakes with quakes, there is no use comparing that Bonin as 8.28Me_bb to say the next biggest quake in the last 12 months, the Nepal quake, at 7.8Mww type. You need to compare it at Me for both (Nepal 7.68Me_bb) or Mww for both. (Bonin 7.8Mww, Nepal, 7.8Mww).
Doing otherwise is selective cherry picking to suit an agenda.
It appears the two quakes chosen have the same magnitude in Mww, but when you look closer the Bonin Is. quake released a lot more energy.
I know its complicated, I drives me crazy when I am processing the data for my maps, that is why I try and show the Me if it is available. Back in the 80's Me was the main magnitude type used for larger quakes.
The biggest contributors to the confusion is the MSM, journalists not doing their research, how many times do you hear on TV News "blah blah blah a quake measuring 7.8 on the Richter Scale hit Nepal today ......". It wouldn't have been The Richter scale which is only useful for quakes below 5 and has slowly been phased out since the 1970's, although the places that have the most quakes such as Japan, California, New Zealand, Greece, Turkey and China still use it.
There is a big gap in the education of the general public in regards to earthquake sizes.

My question was not a personal attack on what you said, I just wondered if I missed something since I posted the data for the earlier part of 2015, I usually give it a week to ensure any adjustments have been made (more magnitude types added) by the networks, and rarely go back later to re-check. When I got back past 1900 it was interesting to see how the magnitude types had been changed recently to Mw, as old data is usually in Ms, the people at the GEM Foundation have been doing a lot of cold case work.

Magnitude 5.6
Region NORTHERN MID-ATLANTIC RIDGE
Date time 2015-08-14 18:03:02.9 UTC
Location 21.14 N ; 45.93 W
Depth 10 km

a reply to: muzzy

Didn't feel like a personal attack but could've been the way you wrote it Everythings fine

Seeing a unstable Pacific ocean near Australia ,New Zeland , Philippines and Japan. Expect a very large quake to occur in this area from now till the end of Saturday.



Also Sun shockwave due to arrive on earth this saturday !!!!!!

a reply to: dreamfox1

I concur !!'

Magnitude Mw 6.6
Region SOLOMON ISLANDS
Date time 2015-08-15 07:47:09.7 UTC
Location 10.92 S ; 163.78 E
Depth 30 km
Distances 451 km E of Honiara, Solomon Islands / pop: 56,298 / local time: 18:47:09.7 2015-08-15
210 km E of Kirakira, Solomon Islands / pop: 1,122 / local time: 18:47:09.7 2015-08-15

EMSC

USGS 6.6

Magnitude 5.2
Region KERMADEC ISLANDS REGION
Date time 2015-08-15 17:29:21.1 UTC
Location 27.03 S ; 176.30 W
Depth 10 km

interesting one. Huge differences in depth in that region. one day it's 10 km the other day it's something like '450'

a reply to: Eagleyedobserver

Its a subduction zone, dipping east to west, trenches, ridges, islands, troughs, more ridges, basins, in that order
this is the region in white(the clear section inside the box is "Kermadec Islands", thats another area.)

this cross section of that map with some earthquakes plotted by depth, shows the slope of the plate subduction, most of the quakes are on the underside of the Australian Plate on the west side.

Thought this might be of interest, seeing as there is so much activity lately at the Solomon Islands
SOLOMON ISLANDS BIGGEST200 2007-2015 data from EMSC, map by Bing, sorted biggest first. 200 is the limit of icons Bing can show.

Also
the last 200 , latest first. That map includes part of the April 2014 SOLOMON-BOUGAINVILLE PING-PONG MATCH SERIES. Politically Bougainville Is. is part of PNG, but geologically it is part of the Solomon Islands.

and the April 2014 SOLOMON-BOUGAINVILLE PING-PONG MATCH SERIES itself, also last first.

Magnitude 5.3
Region NEW IRELAND REGION, P.N.G.
Date time 2015-08-16 21:05:12.3 UTC
Location 5.84 S ; 153.96 E
Depth 73 km

a reply to: muzzy

Hi muzzy,

I love that earthquake depth plot.

Did you create that? If it's not super hard, could you teach me how to do that?

Magnitude M 4.8
Region KEPULAUAN OBI, INDONESIA
Date time 2015-08-16 21:39:42.5 UTC
Location 1.61 S ; 127.49 E
Depth 46 km
Lot of movement around those islands.

and another one on the western side of previous 2 quakes.

Magnitude 4.6
Region ANDAMAN ISLANDS, INDIA REGION
Date time 2015-08-16 21:35:26.9 UTC
Location 13.55 N ; 93.97 E
Depth 60 km

a reply to: crappiekat
Done with the help of IRIS
if you go here and look down in the right hand menu, you will see 3D viewer.
To start you click on the "select region" button on the left hand side and select a box area, then click on "3D viewer", and then use "view" to tilt and rotate.
its a great tool.

a reply to: muzzy

Thanks muzzy.

Cool, cool, cool. Now I go play.

What do you make of this? I don't recall Nebraska having earthquakes.

M 3.6 - 35km SE of Thedford, Nebraska

Time 2015-08-19 06:48:38 UTC
Location 41.779°N 100.249°W
Depth 5.0 km

Bishop

a reply to: Bishop2199

When I saw that, I too went Hmmm...

So I went here.

earthquake.usgs.gov...

So they do have a history. That plate is being pushed and is scrunching up.

LOL! Sorry for the Non Technical terms.