Articles tagged "research"

solar activity over the past 1000 years ethz f

Researchers reconstruct 11-year solar cycles all the way back to year 969

An international team of researchers reconstructed the Sun's 11-year cycles all the way back to year 969 using measurements of radioactive carbon in tree rings. The findings help scientists better understand the dynamics of the Sun, enabling more accurate dating...

January 22, 2021

alaska volcanoes dec 10 2020

Six Alaskan volcanoes may be part of one massive supervolcano

Six stratovolcanoes comprising the Islands of Four Mountains in Alaska's central Aleutian Islands may not be separate volcanoes, but instead a part of one enormous volcanic caldera system, according to scientists who presented the evidence at the American...

December 10, 2020

position and velocity map of the milky way galaxy

New map of Milky Way Galaxy shows Earth is 7 km/s faster and 2 000 LY closer to the galactic center

Earth just got 7 km/s faster and about 2 000 light-years closer to the hypothesized supermassive black hole in the center of the Milky Way Galaxy, according to results of a new and better model of the galaxy based on new observation data, including a catalog of...

November 28, 2020

lightning nov 26 2020

Scientists find 'superbolts' flashing 1 000 brighter than normal lightning

Two new studies show that the brightest lightning events on Earth called "superbolts" can be more than 1 000 times brighter than normal lightning flashes. The findings could help scientists understand these mysterious flashes better, improving safety...

November 27, 2020

STEVE nov 26 2020 5

Citizen scientists discover new, mysterious feature of aurora-like phenomenon STEVE

Citizen scientists have discovered that the aurora-like phenomenon called STEVE or Strong Thermal Emission Velocity Enhancement has a new feature-- small, green fence-like lights streaking through the atmosphere at 1 600 km/h (1 000 mph). STEVE is also a discovery...

November 26, 2020

mars water concept nasa

Research suggests water is naturally occurring on all rocky planets

A new study published recently in Science Advances suggests that water may be naturally occurring on planets and does not require an external source like water-rich asteroids. The study turns the current theory about the emergence of water upside down. The research...

November 11, 2020

Screenshot_ _04_11_2020_,_7_31_38_PM

New technology detects long-hidden earthquakes

Scientists at the Stanford School of Earth, Energy, and Environmental Sciences described a new method for using artificial intelligence to detect millions of long-hidden small earthquakes or microquakes, providing possible hints about how earthquakes evolve. Big...

November 04, 2020

full sequence Matuyama–Brunhes geomagnetic reversal

Most detailed and complete record yet of Earth's last magnetic reversal

A team of researchers from Japan made the most detailed and complete record to date of Earth's last magnetic reversal that took place about 773 000 years ago. Their results were published recently in the Progress in Earth and Planetary Science, a Springer...

November 02, 2020

earthquake oct 19 2020

New insights show factors that trigger earthquakes

A new study by François Xavier Passelegue, a scientist at ENAC's Laboratory of Experimental Rock Mechanics (LEMR), has provided new insights into the origins of earthquakes, showing that the speed and intensity with which seismic waves cultivate after a...

October 26, 2020

tibet oct 16 2020 2

New seismic research explains continental collision beneath Tibet

New seismic data collected by scientists at Stanford University and the Chinese Academy of Geological Sciences suggests that two competing processes are simultaneously operating beneath a collision zone in Tibet. This research contributes to an ongoing debate over...

October 17, 2020

ilopango caldera panoramic

Multifaceted study dates massive Tierra Blanca Joven eruption to 431 CE

It has been known that a major volcanic eruption shocked the Maya civilization, but the disaster's precise date and nature were unidentified. In a new study, an international team of archaeologists confirmed that the civilization was rocked by the Tierra Blanca...

October 04, 2020

9solar storms oct 1 2020 2

Solar storms more severe when two events 'slipstream' behind each other

A research team led by Imperial College London has presented in a new study that Coronal Mass Ejections (CMEs) or solar storms could be more extreme than previously believed when they "slipstream" each other or when two such events follow each other....

October 04, 2020

distribution of long period comets f

Study identifies second alignment plane of solar system

According to a new study published in The Astronomical Journal, comet motions indicate that the solar system has a second alignment plane. The discovery has significant implications for models of how comets originally formed in the solar system. The study, led by...

September 29, 2020

south pole jupiter

Researchers solve mysterious storm patterns on Jupiter's south pole

Since first spotted by NASA's Juno space probe in 2019, a collection of swirling storms arranged in an unusually geometric pattern has been a mystery to most scientists. A new study may have uncovered how the strange weather forms and why the storms behave...

September 29, 2020

ef4 alabama tornado damage featured image

Migrating tornadoes found to be more dangerous and deadlier in the Southeast, U.S.

Migrating tornadoes that are increasingly occurring in the southeastern United States have been found to be more dangerous and twice as deadly as twisters elsewhere in the country, according to an analysis by the Environment & Energy Publishing (E&E News). A...

September 29, 2020

cyclone fani 2019 3

Increase in frequency of severe cyclones over the North Indian Ocean

From 1981 to 2017, statistics show that an average of five cyclones developed over the North Indian Ocean per year. However, recent studies indicate that there has been an increase in the frequency of cyclone formation from 2017 to 2019. As a result, there was also...

September 29, 2020

comet with own aurora sept 23 2020 2

Unusual ultraviolet aurora spotted around a comet for the first time

ESA's Rosetta mission has revealed that its target comet, Comet 67P/Churyumov-Gerasimenko, has its own far-ultraviolet aurora. This is the first time such electromagnetic emissions in the far-ultraviolet have been detected on a celestial object, aside from any...

September 23, 2020

dawn of dinosaurs sept 17 2020

Newly identified mass extinction triggered dawn of dinosaurs 233 million years ago

A new study has identified a major mass extinction 233 million years ago, which triggered the dawn of dinosaurs-- the event has been called the Carnian Pluvial Episode. During this era, huge volcanic eruptions emitted carbon dioxide, methane, and water vapor into...

September 18, 2020

san andreas fault ca us

San Andreas Fault earthquakes caused by deep underground forces

Scientists at the University of South California (USC) have detected that the earthquakes registered alongside California’s San Andreas Fault occur much deeper than previously understood. The previous knowledge of the fault indicated that earthquakes are...

September 09, 2020

solar system shape aug 19 2020

Research suggests our solar system is shaped like a 'deflated croissant'

Scientists have developed a new prediction about the shape of the bubble surrounding our solar system and have revealed that it is actually shaped like a "deflated croissant." Using data from the space agency's missions, the scientists came up with the...

September 05, 2020

taiwan landslide 2009 2

Taiwan's deadliest typhoon caused a spike in earthquakes in the years following the storm, new study shows

2009 Typhoon Morakot caused a spike in earthquakes in Taiwan in the years following the storm, a new study reveals. The storm triggered extensive flooding, huge landslides, and left almost 700 fatalities, making it the deadliest typhoon to impact the country in...

September 05, 2020

sunset over phoenix arizona by alexander nie f

Study: Modern Grand Solar Minimum (2020 - 2053) leads to cooling, important implications for entire planet

In a new study published recently in the journal Temperature, Prof. Valentina Zharkova demonstrates that the Sun has entered into the modern Grand Solar Minimum (2020 - 2053) that will lead to a significant reduction of the solar magnetic field and activity like...

September 02, 2020

lidar shooting into antarctic night sky aug 20 2020 2

New equatorial wind patterns observed in Antarctica, revealing new connections in global circulation

A team of researchers found evidence of a new equatorial wind pattern at Antarctica, unveiling a crucial connection between winds at the Earth's equator and atmospheric waves about 10 000 km (6 000 miles) away at the South Pole. The findings highlight how winds...

August 29, 2020

Moon crater aug 28 2020 2

Eruptive origins of pyroclastic deposits on the Moon

A new study by researchers from Arizona State University (ASU) suggests that the early Moon may have been more volatile-rich than previously believed. Previous studies concluded that lunar volcanoes had exploded primarily cold bedrock, but the ASU team said there...

August 29, 2020

9c

Earth moving through radioactive remnants of supernovae for the past 33 000 years

A new study suggests that the Earth has been moving through the remnants of an ancient exploded star for at least the past 33 000 years. The research team extracted a special isotope of iron called iron-60 from sea sediment samples and found that the isotope is...

August 27, 2020

martian nightglow aug 26 2020 4

Mysterious, spiral-shaped ultraviolet light pulses over Mars

New images from NASA's MAVEN spacecraft reveal wide areas of Mars' night sky pulsing in ultraviolet light. While researchers understand the light's source, its mysterious spiral shape left them puzzled. "There is a vast spiral of ultraviolet light...

August 26, 2020

jerusalem magnetic field aug 18 2020

Researchers measure Earth's magnetic field in Jerusalem in 586 BCE

Researchers from Tel Aviv University, the Hebrew University of Jerusalem, and the Israel Antiquities Authority were able to measure the Earth's magnetic field in Jerusalem in 586 BCE-- the time when the city was destroyed by the Babylonians. The groundbreaking...

August 20, 2020

binary art

Our Sun started its life with a binary companion, new study suggests

A new theory published this week in the AAS' The Astrophysical Journal Letters suggests that our Sun may once have had a binary companion of similar mass. If confirmed, the presence of an early stellar companion increases the likelihood that the Oort cloud was...

August 19, 2020

guadeloupe volcano aug 8 2020 3

First high-resolution optical seismometer survives 'hellish' peak of La Grande Soufrière

A team of scientists successfully installed an optical seismometer on La Grande Soufrière volcano's summit-- the first high-resolution instrument placed on an active volcano. The seismometer, used to monitor gas and steam eruptions, survived the...

August 15, 2020

sun aug 12 2020

Cosmic rays increase remarkably as solar activity shows persistent decline, resembles Dalton minimum of 1790 - 1830

Recent solar conditions indicate a persistent decline in solar activity‐‐‐possibly similar to the past solar grand minima, scientists reporting in AGU's Space Weather write. During such periods of low solar activity, the fluxes of galactic cosmic rays...

August 12, 2020

space debris aug 8 2020 2

Lasers detect space debris in daylight for the first time

For the first time, scientists have used lasers to detect space debris in broad daylight. Prior to this, lasers could only be used to measure the distance to space debris during a few twilights hours. A new study proved that it is possible to use lasers in full...

August 10, 2020

volcanic eruptions cooled the earth aug 7 2020

Study suggests volcanic eruptions caused global cooling 13 000 years ago, not meteors

Some scientists believe that an extraterrestrial impact, such as a meteor collision, caused global cooling around 13 000 years ago. However, a new study presents evidence left in layers of sediment showing that the event was most likely caused by volcanic eruptions....

August 09, 2020

herbivores aug 6 2020 5

Study finds herbivores at highest risk of extinction

A new study by Utah State University (USU) suggests that modern megaherbivores-- plant-eaters that weigh more than 1 000 kg (2 200 lbs)-- have the highest risk of going extinct among mammals, birds, and reptiles, just like what happened to their prehistoric...

August 06, 2020

oddball meteorite aug 5 2020 2

Scientists resolve origin of oddball meteorites with X-rays

Scientists at the Lawrence Berkeley National Laboratory conducted X-ray experiments to resolve the origin of rare, odd meteorites that have puzzled many researchers since they were discovered about 50 years ago. Also known as Type IIE iron meteorites, these objects...

August 06, 2020

arctic ocea depth map aug 1 2020 2

Most detailed seafloor depth map of Arctic Ocean released

An international team of researchers released the most detailed seafloor depth map of the Arctic Ocean. The map, which is the 4.0 version of the International Bathymetric Chart of the Arctic Ocean (IBCAO), expands up to 19.6 percent of the submarine surface mapped...

August 02, 2020

solar flare nasa aug 1 2020 2

New method helps predict big solar flares

Scientists developed a new physics-based technique that successfully predicted seven of the Sun's largest flares from the past solar cycle, out of a set of nine. With further improvement, the new model could be used to inform forecasters of these intense...

August 02, 2020

7subduction zone events aug 1 2020

Research offers new clues about where and how subduction starts on Earth

An international team of researchers published a new study providing new clues about how and where subduction begins on Earth, the process behind the deadliest volcanic eruptions. The Earth's largest earthquakes and most explosive volcanoes occur at subduction...

August 02, 2020

wild beehive july 31 2020 2

Bee population decline threatens major crop yields in U.S and global food security

Crop yields for major crops such as apples, blueberries, and cherries across the U.S. are being limited by a lack of pollinators due to the decline of the wild bee population, according to new research, which was the most comprehensive study of its kind. Researchers...

July 30, 2020

snowball earth july 29 2020 2

Snowball Earth events linked to drastic drop in Sun's radiation

Scientists from the Massachusetts Institute of Technology (MIT) suggest that Snowball Earth-- a hypothesis proposing that the planet's surface became entirely frozen at least twice 700 million years ago-- might be linked to dramatic plunges in the amount of...

July 29, 2020

hurricane lane 13 30z august 21 2018 bg ir

Hurricane "Lane" caused first known case of both heavy rainfall and multiple instances of fire simultaneously

A recent study by the University of Hawaii examined the impacts of the 2018 Hurricane "Lane" and revealed that preceding moisture conditions brought by the storm exacerbated fire hazards, and both fire and rain severity were impacted by the hurricane...

July 26, 2020