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Sea ice levels in Antarctica dropped to a record low this year, but experts say there is not a clear link to climate change.
More than 60 meteorologists and scientists from around the world are holding a week-long meeting in Hobart, Tasmania, to better understand sea ice changes on the frozen continent.
Dr Jan Lieser from the Antarctic Climate and Ecosystems Cooperative Research Centre said sea ice levels had experienced a “massive increase” in variability over the past few years.
Sea ice coverage fell to 2.075m sq km in March, the lowest since satellite observations began in 1979. But just three years earlier it hit a record high of more than 20m sq km.
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Increased geothermal activity heating the oceans could account for the unusually strong hurricane activity. Very interesting thread. Thank you.
originally posted by: ElectricUniverse
Sea ice levels in Antarctica dropped to a record low this year, but experts say there is not a clear link to climate change.
More than 60 meteorologists and scientists from around the world are holding a week-long meeting in Hobart, Tasmania, to better understand sea ice changes on the frozen continent.
Dr Jan Lieser from the Antarctic Climate and Ecosystems Cooperative Research Centre said sea ice levels had experienced a “massive increase” in variability over the past few years.
Sea ice coverage fell to 2.075m sq km in March, the lowest since satellite observations began in 1979. But just three years earlier it hit a record high of more than 20m sq km.
...
www.theguardian.com...
So, more evidence is coming up that "Climate Change/AGW" is not to be blamed for Antarctic sea ice reaching low levels. One of the possible causes for this low sea ice levels is an increase in geothermal activity which would be melting sea ice and glaciers from below.
So, are the changes the Earth is undergoing "settled science?... Or do we still have questions about what is happening to the Earth?...
www.nasa.gov...
Antarctic Sea Ice Reaches New Record Maximum
All of these events, the increase in seismic activity, the increase volcanic activity, etc,
“A rare combination of a remote influence from the tropical Pacific and an unusual position of the jet stream in the southern hemisphere conspired to cause this event,” University of Washington’s Malte Stuecker said.
The 2010–2014.3 global earthquake rate increase
Tom Parsons 1 and Eric L. Geist 1
1 U. S. Geological Survey, Menlo Park, California, USA
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1. Introduction
Obvious increases in the global rate of large (M ≥ 7.0) earthquakes happened after 1992, 2010, and especially during the first quarter of 2014 (Table 1 and Figure 1). Given these high rates, along with suggestions that damaging earthquakes may be causatively linked at global distance [e.g., Gomberg and Bodin, 1994; Pollitz et al., 1998; Tzanis and Makropoulos, 2002; Bufe and Perkins, 2005; Gonzalez-Huizar et al., 2012; Pollitz et al., 2012, 2014], we investigate whether there is a significant departure from a random process underlying these rate changes. Recent studies have demonstrated that M ≥ 7.0 earthquakes (and also tsunamis) that occurred since 1900 follow a Poisson process [e.g., Michael, 2011; Geist and Parsons, 2011; Daub et al., 2012; Shearer and Stark, 2012; Parsons and Geist, 2012; Ben-Naim et al., 2013]. Here we focus on the period since 2010, which has M ≥ 7.0 rates increased by 65% and M ≥ 5.0 rates up 32% compared with the 1979 – present average. The first quarter of 2014 experienced more than double the average M ≥ 7.0 rate, enough to intrigue the news media [e.g., www.nbcnews.com...]. We extend our analysis to M ≥ 5.0 levels, as many of these lower magnitude events convey significant hazard, and global catalogs have not generally been tested down to these thresholds.
2. Methods and Data
We work with the Advanced National Seismic System (ANSS) catalog of M≥ 5.0 global earthquakes for the period between 1979 and 2014.3 with a primary focus on the recent interval between 2010 and 2014.3 that shows the highest earthquake rates (Table 1 and Figure 1). A variety of tests suggest that the catalog is complete down to magnitudes between M=4.6 and M=5.2, depending on the method used to assess it (see supporting information). We examine a range of lower magnitude thresholds above M =5.0 to account for this uncertainty.
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Yeah. We've been a through that. About how that data was cherry picked. About the limits of the ANSS catalog. Remember?
As for the claim from a "certain person" that there is no such increase activity...
Ok. How many are active? What evidence is there that there is more activity now than there was 100 years ago?
There are an estimated 3 million underwater volcanos, and most of them are bigger than the majority of the land volcanos.
Obvious increases in the global rate of large (M ≥ 7.0) earthquakes happened after 1992, 2010, and especially during the first quarter of 2014 (Table 1 and Figure 1).
...
Here we focus on the period since 2010, which has M ≥ 7.0 rates increased by 65% and M ≥ 5.0 rates up 32% compared with the 1979 – present average. The first quarter of 2014 experienced more than double the average M ≥ 7.0 rate, enough to intrigue the news media
...
A strong increase in the number of global earthquakes is noted since 2010 that appears to have accelerated during the first quarter of 2014. However, there is no evidence that this increase represents a departure from temporally independent earthquake occurrence, as many of these earthquakes are local aftershocks of prior events.
June 2, 2014. 7:42 P M
No, it's not your imagination: The Los Angeles area is feeling more earthquakes this year.
After a relatively quiet period of seismic activity in the Los Angeles area, the last five months have been marked by five earthquakes larger than 4.0. That hasn't occurred since 1994, the year of the destructive Northridge earthquake that produced 53 such temblors.
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Tuesday, September 26, 2017
The Costa Rica News (TCRN) – If it seems like earthquakes and erupting volcanoes are happening more frequently, that’s because they are. Looking at global magnitude six (M6) or greater from 1980 to 1989 there was an average of 108.5 earthquakes per year, from 2000 to 2009 the planet averaged 160.9 earthquakes per year: that is a 38.9% increase of M6+ earthquakes in recent years.
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Is the Recent Increase in Felt Earthquakes in the Central US Natural or Manmade?
By David J. Hayes
By David J. Hayes, Deputy Secretary, U.S. Department of the Interior
Last week, following the publication of an abstract intended to preview an upcoming talk by a U.S. Geological Survey (USGS) scientist, a number of news articles started popping up about new scientific evidence of a link between unconventional oil and gas production here in the United States, and seismic activity (earthquakes).
Unfortunately – although not surprisingly given the limited information available in the abstract – the accuracy of these media reports varied greatly. With this blog post, I want to clarify a few points about USGS's important and ongoing work to study induced seismicity.
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Background
As part of its ongoing effort to study a variety of potential impacts of U.S. energy production, USGS scientists have been investigating the recent increase in the number of magnitude 3 and greater earthquakes in the midcontinent of the United States. Beginning in 2001, the average number of earthquakes occurring per year of magnitude 3 or greater increased significantly, culminating in a six-fold increase in 2011 over 20th century levels.
These earthquakes are fairly small – large enough to have been felt by many people, yet small enough to rarely have caused damage.
An increase in earthquakes such as this prompts an important question: are they natural, or man-made? To address this question, a team of USGS scientists led by Bill Ellsworth of the Earthquake Science Center analyzed changes in the rate of earthquake occurrence in the midcontinent using large USGS databases of earthquakes recorded since 1970.
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Preliminary Findings
USGS's studies do not suggest that hydraulic fracturing, commonly known as “fracking,” causes the increased rate of earthquakes. USGS's scientists have found, however, that at some locations the increase in seismicity coincides with the injection of wastewater in deep disposal wells.
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What happened before 1980? And what about 1990 to 2000?
rom 1980 to 1989 there was an average of 108.5 earthquakes per year, from 2000 to 2009 the planet averaged 160.9 earthquakes per year:
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Preliminary Findings
USGS's studies do not suggest that hydraulic fracturing, commonly known as “fracking,” causes the increased rate of earthquakes. USGS's scientists have found, however, that at some locations the increase in seismicity coincides with the injection of wastewater in deep disposal wells.
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originally posted by: Phage
a reply to: ElectricUniverse
Yes. Fluid injection is known to cause earthquakes.
What's your point? Does it also heat up the ocean?
However, it all seems to be tied since other planets in the Solar System have also been under such changes, yet you have been one of the people claiming "there is no link".
originally posted by: Phage
a reply to: ElectricUniverse
However, it all seems to be tied since other planets in the Solar System have also been under such changes, yet you have been one of the people claiming "there is no link".
Other planets have increased volcanic and earthquake activity? Tell me more.