A time-lapse of Planet Earth with Electro-L Weather Satellite

Northern Hemisphere

Southern Hemisphere

From Mashable

A time-lapse of Planet Earth, created from images produced by the geostationary Electro-L Weather Satellite.
The images were obtained beginning on May 14th, and end on May 20th 2011.
Eclipsing NASA’s updated “Blue Marble” shot, which is a composite of many satellite images, this image is a single-shot taken from 22,369 miles away by Russian weather satellite Elektro-L No.1.
(see Russian Federal Space Agency)

They are taken every half hour, and have been interpolated (smoothed) to create this video.

The images are taken in four different wavelengths of light, three visible, and one infrared.

 October 2011 to March 2012

The colors are quite different from the ones on NASA’s photos of Earth.
The images are the largest whole disk images of our planet, each image is 121 megapixels, and the resolution is 1 kilometer per pixel.

To capture the image, the satellite combines visible and infrared wavelengths of light.
The infrared light is reflected by forests and vegetation, which appear orange in these images, which is why the parts of the Earth that would normally be green are seen as rusty brown.

You can explore the zoomable version of the image here.

Links :

• NTs OMZ image gallery (source)
• Gizmodo : Why do these breathtaking Russian images of Earth look so different from NASA’s?

France SHOM a new nautical chart layer (in Premium) in the Marine GeoGarage

France & other territories managed by the SHOM

SHOM (Service Hydrographique et Océanographique de la Marine) in France gives us its agreement (license no 4/2012) to display their nautical raster charts (a set of 370 charts - 692 including sub-charts-) in the Marine GeoGarage (see complete list)
Additional charts (not yet ready in Mercator/WGS84) will be ready in the next future for this layer.

France metropolitaine

Antilles - Guyane

Nouvelle Calédonie - Polynésie

Mariners should keep French nautical charts up-to-date by consulting the SHOM Notices to Mariners (Groupe hebdomadaire d'Avis aux navigateurs / online).

So today Marine GeoGarage is able right now to display 4585 charts (1993 freely) coming from 11 international Hydrographic Services.

So with the Premium Chart subscription (9.9 € / month), you have access today to :
UKHO, CHS, AHS and SHOM nautical charts private layers (2592 charts)


--- END-USER RESPONSIBILITY ----------------------

WARNINGS :
• No national hydrographic office (HO), State Authority, and their licensors have verified the information in this product or quality assured it, and none accept liability for the accuracy of reproduction or any modifications made thereafter. No national hydrographic office and their licensors makes any warranties or representations, express or implied, with respect to this product.  No national hydrographic office warrants that the product satisfies national or international regulations regarding the use of the appropriate products for navigation or that it contains the latest hydrographic information available.
• All charts are used directly from existing government and other official charts ("© SHOM - reproduced with authorization n°4/2012")  and should not be used solely for navigation. Digital charts are intended to be used as an aid to traditional navigational charts, not as a replacement. Only official government charts and notices to mariners contain all information needed for the safety of navigation, and as always, the captain is responsible for their prudent use.
M.I.S. (GeoGarage editor) and the SHOM give no warranty in relation to the data (including accuracy, reliability, completeness or suitability) and accepts no liability (including, without limitation, liability in negligence) for any loss, damage or costs relating to any use of the data.
This information may not be copied, reproduced, translated, or reduced to any medium or machine readable form, in whole or part.

---in French ---

AVERTISSEMENTS :

L'application iPhone/iPad est issue du GeoGarage, plateforme web et mobile de cartographie nautique et réalisée à partir des produits numériques provenant du SHOM.
Aucun service hydrographique officiel n'a vérifié les informations contenues dans cette réalisation et ne peut-être tenu responsable de la fidélité de leur reproduction ou de toute modification ultérieure.
L'utilisation de ce produit dérivé n'exonère pas de l'obligation d'utiliser les documents nautiques appropriés prévus par les règlements nationaux ou internationaux.
L'application est produite sous licence du Service Hydrographique et Océanographique de la Marine :
"© SHOM - reproduit avec l'autorisation n°4/2012"
Ainsi l'utilisateur convient que l'usage de cet outil cartographique en ligne n'est qu'une aide à la navigation qui ne peut en aucun cas se substituer aux cartes et documents officiels de navigation.
M.I.S. (éditeur du GeoGarage) et le SHOM se dégagent de toute responsabilité pour tout dommage relatif à l'utilisation de l'outil.
De plus son usage est strictement protégé : les informations ne peuvent pas être copiées ou reproduites sous quelque forme que ce soit, en tout ou partie.

Satellite study of tagged manta rays exposes hidden habits

From e!ScienceNews

Using the latest satellite tracking technology, conservationists from the Wildlife Conservation Society, the University of Exeter (UK), and the Government of Mexico have completed a ground-breaking study on a mysterious ocean giant: the manta ray.
The research team has produced the first published study on the use of satellite telemetry to track the open-ocean journeys of the world's largest ray, which can grow up to 25 feet in width.
Researchers say the manta ray -- listed as "Vulnerable" by the International Union for Conservation of Nature (IUCN) -- has become increasingly threatened by fishing and accidental capture and now needs more protection.

The study was published May 11 in the online journal PLoS One.

Utilization distribution of manta ray locations (a)

(quartic kernelling; grey polygons showing 25%, 50%, 75%, from darkest to lightest grey).

"Almost nothing is known about the movements and ecological needs of the manta ray, one of the ocean's largest and least-known species," said Dr. Rachel Graham, lead author on the study and director of WCS's Gulf and Caribbean Sharks and Rays Program.
"Our real-time data illuminate the previously unseen world of this mythic fish and will help to shape management and conservation strategies for this species."

The research team attached satellite transmitters to manta rays off the coast of Mexico's Yucatan Peninsula over a 13-day period.
The tracking devices were attached to the backs of six individuals -- four females, one male, and one juvenile.

"The satellite tag data revealed that some of the rays traveled more than 1,100 kilometers during the study period," said Dr. Matthew Witt of the University of Exeter's Environment and Sustainability Institute. "
The rays spent most of their time traversing coastal areas plentiful in zooplankton and fish eggs from spawning events."

Like baleen whales and whale sharks, manta rays are filter feeders that swim through clouds of plankton with mouths agape.

Movements of manta rays in the western Caribbean and south-east Gulf of Mexico

The research team also found that the manta rays spent nearly all their time within Mexico's territorial waters (within 200 miles of the coastline), but only 11.5 percent of the locations gathered from the tagged rays occurred within marine protected areas.
And the majority of ray locations were recorded in major shipping routes in the region; manta rays could be vulnerable to ship strikes.

"Studies such as this one are critical in developing effective management of manta rays, which appear to be declining worldwide," said Dr. Howard Rosenbaum, Director of WCS's Ocean Giant Program.

In spite of its malevolent, bat-like appearance, the manta ray -- sometimes referred to as the "devilfish" -- is harmless to humans and lacks the stinger of the better-known stingray.
The manta ray possesses the highest brain to body ratio of all sharks and rays and gives birth to live young, usually one or two "pups" every one or two years.
Manta rays are apparently declining in the Caribbean and in other tropical regions of the world's oceans, in part because they are captured for shark bait and a demand for gill rakers (small, finger-like structures that filter out the ray's minute zooplankton prey) in the traditional Chinese medicinal trade.

Rise and fall of underwater volcano revealed

The Pacific ring of fire

From BBC

The violent rise and collapse of an underwater volcano in the Pacific Ocean is captured in startling clarity for the first time.

Researchers studying the Monowai volcano, near Tonga, recorded huge changes in height in just two weeks.


The images, gathered by sonar from a research ship, shed new light on the turbulent fate of submarine mountains.

AWESOME FORCES: A still from sonar images showing dramatic changes on the Monowai volcano

Published in the journal Nature Geoscience, the findings were made during a seabed survey last year.

Underwater wonder

Lead author Tony Watts of Oxford University told the BBC that the revelation was "a wake-up call that the sea-floor may be more dynamic than we previously thought."
"I've spent my career studying the seabed and have generally thought it pretty stable so it's stunning to see so much change in such a short space of time."

As many as 32,000 underwater mountains have been identified around the world and the majority are believed to be volcanic in origin.
Several thousand of these may be active but a combination of ocean depth and remoteness means that very few have been studied.

This research into the Monowai volcano provides a fascinating insight into the little-known world of submarine geology.
Monowai was first spotted from an aircraft in 1944.
Surveys over following years found evidence of significant change - with the sea discoloured and seismic activity detected.

Aerial view of the discoloured sea above Monowai submarine volcano, 27 October 2009
(photo courtesy RNZAF)

Studies between 1978 and 2007 showed the summit repeatedly rising and falling

But this latest analysis compared images gathered on May 14 and then June 1-2 last year and even in that short period the volcano had undergone a transformation.

Travelling on the research ship the R/V Sonne, the scientists first spotted that the sea above the volcano had turned a yellowy-green and gas bubbles were rising to the surface.

According to Professor Watts, ""I had butterflies. The gas was smelling awful - like rotten eggs. We saw a slick ahead of us and with something venting, there could have been a sudden shallowing of the water."

The team then left the area to carry on with planned research elsewhere but three days later were warned that seismic detectors on the Cook Islands had detected violent activity around the volcano over a five-day period.

"If we had been over the volcano during the eruption, rocks could have hit the hull of the ship - that could have been potentially dangerous."

Later the ship returned to the scene and the scientists were surprised to see how much the volcano had changed.
In the space of a fortnight, one part of the volcano's summit had collapsed by as much as 18.8m while new lava flows had raised another area by 79.1m.
Most striking was the creation of an entirely new volcanic cone.

The researchers believe the changes are larger than at most other volcanoes.
Only Vesuvius and Mount St Helens have recorded larger growth rates.

The paper says the speed of growth and change is "a reminder of how rapidly geological processes such as submarine landsliding and volcanism can occur."
Professor Watts said: "Any movement on the seabed has the potential to create a tsunami. An earthquake suddenly dislocates the seabed. Here a violent disturbance lasted five days with magma oozing out which might be too slow to trigger a tsunami - but it's unknown.
"This is a violent exchange of rock into the water - it could destabilise the cone and cause a landslide which in principle could cause a tsunami.

The same expedition's survey produced stunning images last year of a line of underwater volcanoes being carried inexorably to the chasm of a subduction zone, the Tonga Trench.

That research was investigating whether the volcanoes exacerbated or dampened the pressures on the fault line.

Links :

• HuffingtonPost : Underwater volcano Monowai erupts in pulses

I have the Marine US app for my iPhone. How do I delete tracks from the screen?

Actually, the track is just visible in LIVE when the application is ON.

So with the multitasking feature inside (iOS > 4), you need to force to really quit the application.

For that, use the Multitasking bar to close any app you want.

Here‘s how:

• Double tap the Home button to bring up the Multitasking bar
• Press and hold anywhere on the multitasking bar until the icons on it start to wiggle.
• While they are wiggling, each icon has a Minus sign symbol above it.
• Press the Minus symbol above Marine US application to close it down.

then restart Marine US as normal and it will start a new track