Tuesday, December 8, 2009
Thousands of spectators and surfers are flocking to Hawaii's beaches to see the biggest waves in years crash ashore.
Heavy traffic backed up for miles yesterday along roads leading to Oahu's North Shore. Some of the world's most daring surfers took on the powerful and dangerous waves, which forecasters say could reach heights of 50ft (15 metres) by tomorrow.
The surf grew so large that a few beaches on Oahu and Maui were closed because lifeguards feared inexperienced sightseers could drown, according to state officials.
Surf's up as biggest waves in five years come to Hawaii after North Pacific storm
In a news report just received, they say:
Despite deniers in the USA, it has been confirmed that Wednesday 9 December is the last day that the ICOM plant in Wakayama, Japan will produce the IC-706MKIIG transceiver.
ICOM Australia said it has checked with Japan and been reassured that the earlier advice received that the popular transceiver has been discontinued is correct.
The reason is that some components used in the IC-706MKIIG are no longer available and the model had to cease production.
For more on this story see the news section of the Amateur Radio Victoria website
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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