Sunday, September 18, 2011

New Swarms of Earthquakes off the coast of Honshu Japan

I have received a message in regards to my thoughts about the current Earthquake Swarm off the East Coast of Honshu Japan.

In the last week they have had 13 earthquakes at 5.0 magnitude or larger.

I am an avid hobbyist in the Geophysics field. I have studied Climatology, Earthquakes and Earth Structure, Environmental Geophysics, Global Coastal Change, Many areas of Geology, Seismology, and Volcanology.
I do not hold a job in these fields. It is all an extensive hobby, one of many hobbies that I have.

This is my personal opinion.

So I was asked in this message if this is something to be concerned with?
In My Humble Opinion~ anytime there are swarms like this people should be concerned. Dose it mean the BIG One is going to happen again? No, not necessarily.
Earthquake Swarms are not unusual and happen all around the globe.
It is a good idea to be prepared. The March Japan Earthquake should have taught many lessons about preparedness.

By 5 September 2011, Japan had experienced over 900 aftershocks after the magnitude 9.0 (Mw) earthquake on March 11, 2011 with about 60 aftershocks being over magnitude 6.0 and three over magnitude 7.0. For conciseness, only earthquakes with magnitudes greater than 7.0 or an intensity greater than lower-6 on the shindo scale are listed here. Mw or Mw refers to the moment magnitude scale, while Mjma, Mjma, or Mj refer to the JMA magnitude scale.

On my blog before the March 11th Quake I had posted my concerns over the swarm then.
You can see my post;

Tuesday, March 8, 2011

Wednesday, March 9, 2011

Thursday, March 10, 2011

Friday, March 11, 2011
In the early morning hours of Friday, March 11, 2011, I was awake with a friend talking on the Amateur Radio when the Earthquake occurred,
I started at the moment the USGS e-mail came in, posting updates and working all my tools and resources to provide information.
That’s what we Amateur Radio Operators do in the event of a disaster.

You can see all the post in the month of March; Click Here

Here is a list of Earthquakes in the region 5.0 and larger from the dates
9/12/11 thru 9/18/11

9/12/11 -
5.0 OFF EAST COAST OF HONSHU, JAPAN
9/13/11 -
5.0 NEAR EAST COAST OF HONSHU, JAPAN
9/15/11-
6.2 NEAR EAST COAST OF HONSHU, JAPAN
9/16/11 -
5.7 OFF EAST COAST OF HONSHU, JAPAN
5.7 OFF EAST COAST OF HONSHU, JAPAN
6.0 OFF EAST COAST OF HONSHU, JAPAN
5.2 OFF EAST COAST OF HONSHU, JAPAN
5.5 OFF EAST COAST OF HONSHU, JAPAN
5.0 NEAR EAST COAST OF HONSHU, JAPAN
6.7 NEAR EAST COAST OF HONSHU, JAPAN
9/17/11 -
5.2 OFF EAST COAST OF HONSHU, JAPAN
5.6 NEAR EAST COAST OF HONSHU, JAPAN
9/18/11-
5.7 NEAR EAST COAST OF HONSHU, JAPAN

Here are some more links of the current Earthquakes;

Latest Earthquakes Magnitude 5.0 and Greater in the World - Last 7 days

Google News
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HOW TO READ PROPAGATION NUMBERS

The A index [ LOW is GOOD ]

  • 1 to 6 is BEST
  • 7 to 9 is OK
  • 11 or more is BAD

Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.

A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

SFI index [ HIGH is GOOD ]

  • 70 NOT GOOD
  • 80 GOOD
  • 90 BETTER
  • 100+ BEST

The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.

Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.

K index [ LOW is GOOD ]

  • 0 or 1 is BEST
  • 2 is OK
  • 3 or more is BAD
  • 5 is VERY VERY BAD

The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.

A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.

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