As if worrying about whether or not the massive San Andreas Fault would erupt after a swarm of 200 earthquakes hit the nearby Salton Sea wasn't enough for Californians, a new fault line was discovered this week in the same area. Researchers are calling it the Salton Trough Fault (STF).
The fault, which lies along the eastern edge of the Salton Sea and runs parallel to the San Andreas Fault, had eluded seismologists up until this point because the sea's bottom has been difficult to map.
Salton Sea Trough (STF), the new fault line, runs very close to the Southern San Andreas Fault (SSAF).Sahakian et al. / Bulletin of the Seismological Society of America
"The location of the fault in the eastern Salton Sea has made imaging it difficult and there is no associated small seismic events, which is why the fault was not detected earlier," principle investigator Neal Driscoll, a geologist at the University of California San Diego, said.
To locate the STF, the research team used instruments—including multi-channel seismic data, ocean-bottom seismometers, and light detection and ranging—to precisely map the deformation within the various sediment layers in and around the sea's bottom.
Scripps geologist Neal Driscoll taking measurements of the onshore sediment layers along the eastern edge of the Salton Sea.Scripps Institution of Oceanography
Writing in the Bulletin of the Seismological Society of America, the authors say "the presence of this fault could alter the current understanding of stress transfer and rupture dynamics in the region, as well as community fault models and ground‐motion simulations on the San Andreas Fault." Meaning, seismologists will have to reassess their earthquake risk models for the greater Los Angeles area.
As the authors explain, recent research has revealed that the region has experienced magnitude-7 earthquakes roughly every 175 to 200 years for the last 1,000 years. But it's been about 320 years since the last major earthquake prompting seismologists to theorize that maybe the STF has something to do with it.
"The extended nature of time since the most recent earthquake on the Southern San Andreas has been puzzling to the earth sciences community," said Nevada State seismologist Graham Kent, a coauthor of the study and former Scripps researcher. "Based on the deformation patterns, this new fault has accommodated some of the strain from the larger San Andreas system, so without having a record of past earthquakes from this new fault, it's really difficult to determine whether this fault interacts with the southern San Andreas Fault at depth or in time."
The discovery of this new fault line will no doubt have researchers busy as they try to determine its character, the hazards it poses and how it interacts with the San Andreas Fault.
"The patterns of deformation beneath the sea suggest that the newly identified fault has been long-lived and it is important to understand its relationship to the other fault systems in this geologically complicated region," Valerie Sahakian, a Scripps alumna and lead author of the study, said.
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Is the San Andreas Fault about to unleash The Big One? Southern Californians were on heightened alert this week after a swarm of small quakes in the Salton Sea near the fault triggered officials to issue an earthquake alert for residents in the area.
Aerial photo of San Andreas Fault looking northwest onto the Carrizo Plain with Soda Lake visible at the upper left.John Wiley / User:Jw4nvc
The swarm began just after 4 a.m. on Sept. 26, starting earthquakes three to seven miles deep underneath the Salton Sea, The Los Angeles Times reported. The biggest earthquakes hit later that morning—a 4.3—and then a pair later at night, another 4.3 followed by a 4.1. There was another burst of activity the following night. The U.S. Geological Survey (USGS) said 96 earthquakes above magnitude 2 were reported by Sept. 30.
This is only the third time this area has seen a swarm like this since earthquake sensors were installed in 1932, and it had more earthquakes in it than swarms in 2001 and 2009, LiveScience said.
Earthquakes in the Brawley seismic zone as of the evening of 09/30/2016.U.S. Geological Survey
Based on this activity, on Sept. 27, the USGS said the risk of an earthquake of magnitude 7.0 or greater in Southern California increased to between 1 in 3,000 and 1 in 100 over the the next seven days. However, as of Friday, Sept. 30, the likelihood was decreasing.
"Preliminary calculations indicate that … there is 0.006% to 0.2% chance (less than 1 in 10,000 to 1 in 500) of a magnitude 7 or greater earthquake being triggered on the southern San Andreas Fault within the next seven days through Oct. 7," the updated warning said. "These revised probabilities are lower than those made earlier this week, due to decreasing swarm activity."
The average chance for such an earthquake striking on any given week is 1 in 6,000.
Groundbreaking Study Confirms Link Between#Fracking & Earthquakes: https://t.co/TMQwZD0SjW (via @EcoWatch @DeSmogBlog)— Sierra Club (@Sierra Club)1459728005.0
The risk assessment from USGS prompted California Gov. Jerry Brown to sign legislation Sept. 29 ordering the development of a statewide warning system that would inform Californians of impending earthquakes through their cellphones, radios and other devices, the Associated Press reported.
San Bernardino, which is on the San Andreas Fault, even closed down city hall through today over concerns about how the structure would fare in a big quake. A 2007 report revealed how the building, constructed in 1971, was not built to withstand a major earthquake and would cost about $20 million to get retrofitted for such an event.
"We haven't had an alert like this," Mark Scott, San Bernardino's city manager, told the Los Angeles Times. "We're not trying to suggest that the alert is an impending catastrophe. We're just trying to use an abundance of caution. We care about the safety of the public and our employees."
The city already has plans to vacate the building within the next few months.
Scientists estimate that the last time the San Andreas Fault's southernmost stretch ruptured was in 1680—more than 330 years ago. A big earthquake happens on average in this area once every 150 or 200 years, making the region long overdue for a major quake. The largest historical earthquakes that occurred along the fault were those in 1857 and 1906.
The general location of the San Andreas fault and several other major faults in California.U.S. Geological Survey
The area where this recent swarm occurred was near a set of north-northeast trending cross-faults beneath the Salton Sea, some which are oriented as such that they would add stress to the San Andreas Fault and the San Jacinto Fault system, according to USGS. However, the agency said swarm-like activity in this region has occurred in the past, so this week's activity, in and of itself, is not necessarily cause for alarm.
While this news is somewhat reassuring, residents in Southern California shouldn't breathe too big a sigh of relief, Morgan Page, a research geophysicist with the USGS in Pasadena, told LiveScience.
"We live in earthquake country and we should be prepared for an earthquake at any time," Page said. "Events like this can change the probabilities from week to week but it never goes to zero."
For many people, the holidays are rich with time-honored traditions like decorating the Christmas tree, lighting the menorah, caroling, cookie baking, and sipping from the unity cup. But there's another unofficial, official holiday tradition that spans all ages and beliefs and gives people across the world hope for a better tomorrow: the New Year's resolution.
Benefits of Chamomile Tea<p><strong>Sleep More Soundly</strong></p><p>Pick your grandmother's brain about the best way to fall asleep, and she might tell you to down a nice glass of warm milk. But if you consult with science, research shows that chamomile might be a better option. That's because it contains an antioxidant called apigenin, which can <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2995283/" target="_blank" rel="noopener noreferrer">promote sleepiness and reduce insomnia and other sleep problems</a>.</p><p>Two research studies even confirmed the power of chamomile throughout the day and before bed. In one of those studies, postpartum women who drank chamomile for two weeks <a href="https://www.ncbi.nlm.nih.gov/pubmed/26483209" target="_blank" rel="noopener noreferrer">experienced better sleep quality than the control group who didn't</a>. Another research effort measured how fast people could fall asleep. Those results illustrated that participants who consumed 270 milligrams of chamomile extract twice daily for 28 days <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3198755/" target="_blank" rel="noopener noreferrer">fell asleep 15 minutes faster than the control</a>. The chamomile group also had considerably fewer sleep disruptions. </p><p><strong>May Be Able to Keep Your Gut Healthy</strong></p><p>Though the following studies used rats as the subjects, research shows that chamomile can potentially play a beneficial role in digestive health. According to that research, the anti-inflammatory properties in <a href="https://www.ncbi.nlm.nih.gov/pubmed/24463157" target="_blank" rel="noopener noreferrer">chamomile extract may be able to protect against diarrhea</a>. Additionally, chamomile may be an effective way to <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4177631/" target="_blank" rel="noopener noreferrer">stop the growth of bacteria in our stomachs that contribute to ulcers</a>.</p><p><strong>Reduces Stress and Anxiety</strong></p><p>Few things are more relaxing than curling up with a good cup of tea, so it's logical that chamomile tea can serve a stress reducer. While it lacks the potency of a pharmaceutical drug, long-term use of chamomile has been shown to <a href="https://www.ncbi.nlm.nih.gov/pubmed/27912875" target="_blank" rel="noopener noreferrer">"significantly" reduce general anxiety disorders</a>. In general, chamomile can act almost like a sedative, and many people enjoy the tea because it puts them in a calm and relaxed state almost immediately. </p><p><strong>Boosts Immune Health</strong></p><p>Vitamin C and zinc are common over-the-counter supplements that people often turn to when they're hoping to avoid becoming sick. While scientists admit that more research must take place to prove chamomile's impact on preventing ailments like the common cold, the existing studies do show promise in this area. </p><p>One study had 14 participants drink five cups of the tea every day for two consecutive weeks. Throughout the study, researchers collected daily urine samples and tested the contents before and after the consumption of the tea. Drinking chamomile resulted in a significant increase in the levels of hippurate and glycine, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2995283/" target="_blank" rel="noopener noreferrer">both of which are known to increase antibacterial activity</a>. Inhaling steam from a pot of freshly brewed chamomile tea may also ease the symptoms of nasal congestion.</p><p><strong>Minimizes Menstrual Cramps</strong></p><p>This one may come as a surprise, particularly to readers who have tried every possible over-the-counter treatment to reduce period pain. Several research studies have proven that chamomile tea may be able to minimize the pain and cramps that occur during menstruation. Women in that same study also dealt with lower levels of anxiety that they typically felt because of menstrual cramps.</p><p><strong>Help Diabetes and Lower Blood Sugar</strong></p><p>For people with diabetes, regulating blood sugar levels can be a matter of life or death. And while chamomile will never replace prescription-strength drugs, it's believed that it can prevent an increase in blood sugar. A 2008 study on rats showed that chamomile could have a <a href="https://pubs.acs.org/doi/abs/10.1021/jf8014365" target="_blank" rel="noopener noreferrer">moderate impact on the long-term risk of diabetes</a>.</p><p><strong>Might Improve Your Skin</strong></p><p>Ever wondered why there's been an influx of chamomile-infused cosmetic products? The reason why so many manufacturers now include chamomile in their lotions, soaps, and creams is because it <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5074766/" target="_blank" rel="noopener noreferrer">acts as an anti-inflammatory on our skin</a>. That means it may be able to soothe the puffiness that plagues us as we age. Those same anti-inflammatory properties can be vital in restoring skin health after we've received a sunburn. </p><p>Before discarding your used chamomile tea bags, try chilling them and placing them over your eyes. Not only will this help with the puffiness, but it can drastically light the skin color around the eye.</p><p><strong>Help With Heart Health</strong></p><p>Some of the most beneficial antioxidants we put into our bodies are what are known as flavones, and chamomile tea is chock full of them. Flavones have the potential to lower both blood pressure and cholesterol levels, which, when elevated, <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4814348/" target="_blank" rel="noopener noreferrer">can lead to heart disease</a>.</p>
Why Everyone Is Drinking Chamomile Tea<p>Now that you know so much about the wonders of chamomile, it shouldn't come as a surprise why the tea is so popular with people of all ages. In addition to tasting great, chamomile offers up benefits that boost the health of body parts both inside and out. As you ponder your own New Year's resolutions, think about how healthy and natural vitamins, supplements, plants, and oils can help guide you on your own personal path to improvement. Happy New Year!</p>
President Obama made a historic announcement Wednesday, saying that the federal government is considering investing in the geothermal power in the rock formations under the Salton Sea in Southern California. Considered to be "the most powerful geothermal reservoirs in the world," the Salton Sea announcement could play a critical role in the future management of the Colorado River.
Mud flies as carbon dioxide gas from deep underground fissures escapes through geothermal mudpots or mud volcanoes, over the southern San Andreas earthquake fault near the Salton Sea National Wildlife Refuge near Calipatria, California. David McNew
Fifty years ago, Glen Canyon Dam was built above the Grand Canyon, and the Colorado River was enslaved to generate electricity to feed the hunger of the booming southwestern cities and suburbs. The Colorado's pulsing flows had carved and nourished the Grand Canyon for millennium, but that came to a crashing halt when the gates were closed and the water was ponded in Lake Powell. The environmental damage and steady decline of one of our nation's crown jewels has led to many calls for restoration of the natural system through the removal of Glen Canyon Dam.
The dam's ability to provide power has shielded it from any serious attempt to bring it down. Times change though and, over the last 16 years, the historic drought in the Southwest U.S. has drained Lake Powell to historic lows, severely diminishing the potential to generate hydroelectricity from the massive turbines encased in Glen Canyon Dam. Water and electricity managers are scrambling to come up with a plan to prop up the lake above what's called "power pool" so they can continue to generate and sell power. Any such solution is, however, clearly a stop-gap measure to keep the dam operational and is doomed to fail when confronted by the realities of climate change.
Lake Powell: Going, Going, Gone? - EcoWatch https://t.co/qu3xLvqQc7 @ClimateDesk @CeresNews— EcoWatch (@EcoWatch)1471384872.0
Fortunately, Obama's announcement offers a true path to the future.
The Salton Sea announcement could create an opportunity to replace the hydroelectric power generated at Glen Canyon Dam and a path forward to restoring the Grand Canyon. The geothermal reservoirs under the Salton Sea are an untapped resource that could add power to the grid as Lake Powell is slowly drained and Glen Canyon Dam is removed. Lake Powell's water could be put into Lake Mead, its downstream sister, thus keeping one fully functioning hydroelectric facility on the grid. Further, this "geo-hydro power trade" could keep the federal government solvent in its current financial contracts to provide electricity to the Southwest U.S.
The idea has already generated a bit of a buzz when Geothermal Resources retweeted this tweet:
Salton Sea Geothermal power could be used replace Glen Canyon hydropower as #climatechange drains Powell. #CORiver https://t.co/Mk9mtkDffQ— SaveTheColoradoRiver (@SaveTheColoradoRiver)1472665768.0
Climate change scientists have painted a bullseye on the Southwest U.S. and the Colorado River, indicating the area will become warmer and dryer with even less flow in the Colorado River. Hydroelectricity is threatened at both Lakes Powell and Mead, as well as reservoirs in California. Salton Sea geothermal power could be a breakthrough in building a climate change-resistant Southwest while also preserving and restoring the lifeblood of the region—the Colorado River.