火星上正刮起一場大沙塵暴

各位，火星上正刮起一場大沙塵暴，位置在南半球的太陽湖，雖然那個經度對位於亞洲的觀測者不利，但只要入夜後即開始觀測，仍有望可以看到或拍攝到。
看marsobservers@yahoogroups.com ，任何時間也有人上載最新的火星照片，全世界也為火星沸騰起來了。

10月19日，沙塵暴仍位於極光灣(Aurorae Sinus)和水手狹谷(Valles Marineris)附近如一條小蛇，21,22日已擴散至南半球高緯度地區。見以下兩張外地天文同好拍攝的照片。

外地天文同好在10月21日世界時4至8時拍攝的一段gif動畫。
http://www.cyberus.ca/~ec088060/pages/images/dust.gif

外國火星塵暴的最新影像。
http://marswatch.amaonline.com/10-22-050325.jpg

來自CMO最新的火星通訊
Dust Strom at Solis L (CMO Notice #2)

Dear Colleagues,

There is a possibility that a great dust storm may be onset from the
Solis L area.

Last night (21 October GMT), as we first observed (here at Mt
Hamilton), the Chryse area, which was brilliant with the dust on 18
October, looked recovered since it showed a usual reddish colour and
the similar bright dust patch was no more than a roundish one found at
an area following Argyre. Just it was quite natural the dust trend
moved southward. The south circumpolar region however was
wine-coloured and so looked dust free yet. However as the area of
Solis L came into the inside, we saw the situation was not so simple
since a brilliant core was observed on the eastern part of Solis L,
the place having a considerable slope: This reminded us of the
situation in 1973 and really in October 1973 nearly in the similar
Martian season, a small core of bright dust on Solis L developed
gradually to a great dust storm. So the next morning change of the
dust core was interesting.

Tonight (22 October GMT), the area came into sight around from 6h GMT,
and the clear dust core area was looked larger and showed a shape
similar to the one we saw in 1973 in a developing stage. The dust area
on Solis L (almost covered except for the western outline) has still a
brilliant core at the lower part and so still energetic. The covering
sands of lower Thaumasia must have been blown up since M Erythraeum
looked as if moved to westward. The eastern end of weaker dust
covering was seen up to 350 degrees W in Noachis tonight. Observations
were made by the use of the 36" Lick refractor (stopped down to 50cm)
with magnification 500x, tutored by Tony MISCH. Seeing was moderate.

The trend of the present Solis L dust storm will be fixed within a few
days: The area of Solis L begins now to come into view from the
hemisphere of Oceania-Asia, and if the case is similar to the one in
1973, the following (westward) regions of Solis L are as well
important, and so we hope the observers are on the alert.

With best wishes

Masatsugu MINAMI at Mt Hamilton on 22 October at 10h GMT
CMO/OAA

太陽湖附近的原貌

火星人又要钻地了 :mrgreen: