Posts treating: "rift zone"
Sunday, 05 July 2015
After leaving a foggy Svalbard, we headed south towards Iceland. I've been there many times before and have enjoyed the liquid love (rain) more than I care to remember. So it was with great excitement that we entered Icelandic airspace with a view that lasted three days!Annotated map of Iceland showing our route into the Keflavik Airport (red line). This is useful to show locations for the first three photos in this post (red circles with numbers).Iceland's north coast looking east over a [...]
At the moment everything is quiet in Iceland. This happens and is the normal state in Iceland, even if Iceland is on top of hot spot and a rift zone. No earthquakes swarms are taking place, at least … Continue reading
During the past couple weeks, Mauna Loa, Hawaii's largest and historically most active volcano, has been exhibiting more quake activity at its summit, and SW rift zone. HVO is monitoring the situation. Inflation restarted in the volcano in 2010, and a slow but gradual inflation is taking place. This is a bit unusual, as Kilauea is still pumping plenty of lava out and consistently creating new land. Typically, Mauna Loa only inflates when Kilauea is not active. It would be highly unusual, [...]
Hekla volcano in Iceland is not known for giving much advance warning, but this time it may be. Scientists in the area have been monitoring the notorious volcano for signs that it may erupt, as it is "overdue" for a show. Hekla is one of Iceland's most active volcanoes, and also one of its most disruptive. Typically this volcano does not give much warning in the way of tremor or earthquakes, indeed the earthquakes seem to precede an eruption only by hours... yet Hekla has been rumbling now for [...]
Here is a picture of what remains of Snæfellsnes – Húnaþing Rift zone. But this rift zone was activity about 4 million years ago. I do not know why this part of the rift zone is visible. But it seems … Continue reading
Here are two pictures of an old rift zone in Iceland. This rift zone was active until about 7 million years ago or so. This cliffs that I show here on this picture are from this old rift zone. It … Continue reading
Since last week I have been trying to figure out just where a mysterious new volcano eruption in the red Sea had taken place. A satellite image has now stilled my curiosity.Last week fishermen reported that they had seen lava fountains rising 20-30 meter near the Zubair islands about 50 km west of Salif, in Yemen. The exact location was however unclear. The eruption apparently lead to the birth of a new island, which can be seen on this satellite image fro NASA Earth Observatory. The activity [...]
There are currently two active lava lakes at Kilauea volcano on Hawaii, one at the summit in Halema’uma’u Crater and one on the floor of Pu’u O’o Crater in the East Rift Zone of the volcano, about 25 km ESE of the summit. The Halema’uma’u lava lake has been particularly active since late May, with
A earthquake swarm of 70 something earthquakes have been taking place close to Presthnjúkar volcano in Iceland. This activity is tectonic in nature and is because of the rift zone. This volcano is located close to south end of Langjökull … Continue reading
Today being Christmas (not my own religious cup of tea), I thought I'd post on earthquakes in the "Holy Land."The USGS has a page on earthquakes in Israel, as it does for many other regions of the world.A sesimicity map from recent years shows the location of a number of small quakes along the Dead Sea Rift zone.Israel actually seems to have little of the way of online resources, at least in English, about their earthquake situation, either through the Israel Geological Survey, or the [...]
Around Nandurbar in northern Maharashtra are spectacular outcrops of a dyke swarm intruding the Deccan volcanics.
Source: IRS-Resourcesat-1
Models of Deccan volcanism envision that most the lava came out of vents and fissures localized along two major rift zones, the roughly east-west trending Narmada Tapi Satpura rift zone along which today the Narmada and Tapi rivers flow westwards
Uff... mein letzter Eintrag liegt ja schon wieder ein Weile zurück. Zeit für ein kleines Update und eine Übersicht, woran ich eigentlich zur Zeit forsche.Mofetten sind ein wunderbares geologisches Phänomen - kalte Gasquellen aus nahezu purem CO2, ein untrügliches Zeichen für einen alten Magmenkörper in der Erdkruste. Sie sind so selten, dass der englischsprachige Wikipedia-Artikel über sie gerade einmal 206 Wörter umfasst. Mofetten gibt es auch in Deutschland, am Laacher See in der [...]
Links from del.icio.us, tagged with geology for September 7th, 2010: Permafrost USGS Maps Booklet MSR Maps U.S. Geological Survey Earthquake Hazards Program http://quest.arc.nasa.gov/projects/astrobiology/astroventure/index.html ??????????????? | WIRED VISION Observe an animation of volcanic islands forming over a hot spot. Permafrost Map of Canada Observe an animation of volcanism along a rift zone. Observe an animation of
The Icelandic coast of Reykjanes where the Mid-Atlantic Ridge comes above sea level.
A number of Eruptions readers have noticed that seismicity along the Reykjanes Ridge that runs to the southwest of Iceland onto the island has increased over the last few days. Sure enough, checking the Icelandic Met Office page on seismicity on the island finds a lot of earthquakes on the southwest peninsula that is the manifestation of the Mid-Atlantic Ridge hitting the hotspot-related Icelandic landmass. [...]
I am moving on thin ice. The Baikal rift is probably the most debated of all rifts in terms of its origin, and it is still discussed whether an Amurian plate exists or not. The Amurian Plate is by the way also known as the Amur Plate or the China Plate/Chinese Plate.The rift has indeed been extensively studied during the last decades, but no simple scenario explains its origin and development, partly because the style of rifting has changed throughout its 30 million years history.Continental [...]
Pu'u O'o is a vent on the eastern rift zone of Kilauea volcano on the Big Island of Hawai'i. It is, and has been the focus of most of the volcanic activity of the last 24 years. I've been on the big island three times now, and until the other day I had never seen the source of all the lavas that have brought great interest and great misery to the region. The problem is that being a shield