Vancouver Island – Three Magnitude > 6.5 Large Earthquakes, Reports of Damages

THREE large earthquakes have shaken the Earth offshore Vancouver Island in the past few hours October 22, 2018.  Initial damage and injury reports are fluid.

Here is what we know at 10:57 hrs UTC (05:57 am CST)…

From CBC (CANADA) – https://www.cbc.ca/news/canada/british-columbia/bc-earthquakes-1.4872470

The New York Post – https://nypost.com/2018/10/22/several-powerful-earthquakes-reported-near-canadian-coast/

Seattle – https://www.seattletimes.com/nation-world/magnitude-6-6-earthquake-strikes-near-port-hardy-canada/

 

 

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LIVE – 3 Consecutive LARGE Earthquakes Strike Off Vancouver Island

THREE large earthquakes have shaken the Earth offshore Vancouver Island in the past few hours October 22, 2018.  A magnitude M6.6 first occurred at 05:39hrs UTC, followed by a larger M6.8 quake at 06:16 hrs UTC, and finally a M6.5 event at 06:22hrs UTC.  The USGS has not issued a tsunami threat despite the shallow depth of these quakes ~ 10kms.  Initial damage and injury reports are fluid.

 

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THE REAL WORLD happening now – Guatemala’s Crisis

LET’S DISCUSS GUATEMALAN REFUGEES
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**The simple answer is – I do not know what the solution may look like or how it is to be implemented**

In the first photo, officials estimate 1000s of Guatemalans attempting to pass into Mexico – a dangerous passage given the extreme load on the bridge. Courtesy of CNN, “As night fell, thousands of migrants remained packed together and exposed to the elements on the Suchiate River bridge connecting Tecun Uman, Guatemala, and Tapachula, Mexico, according to CNN crews on the ground.” This is a humanitarian crisis on many levels and in many Countries.

From this geophysicist’s perspective, it is not hard to understand why some Guatemalan citizens are fleeing – review the pictures below. Several major earthquakes have shaken the small country over the past few months creating wide damages and fatalities; and, it is not expected to be more stable in the near (and probably far) future.

But where to run? Should they return to their home country? Guatemala lies between two tectonic plate boundaries – the Pacific and the Caribbean plates. The edges of tectonic plates are at a high risk for earthquakes, landslides, tsunamis and volcanoes. Living proximal to these high risk areas translates to a high occurrence rate of moderate to catastrophic damages to the poor Guatemalan society.

We need a solution to provide safety for this culture – solutions which address **global** concerns: political, geohazard engineering, geophysical, oceanography and economic disasters. Multiple actions cannot be undertaken by the Guatemalan government and people alone – this is a Western Hemisphere crisis – the global “we” are all affected by the dangers present.

Do we re-distribute geohazard refugees across Nations? Do global geoscience foundations and organizations provide more detailed hazard assessments and geo engineering mitigation recommendations? Does the UN partially fund living costs in the interim? Does the World forbid habitats in these type of environments? The answer must contain a facet of each of the elements noted. The simple answer is that I do not know – it is far too complicated for one person, one nation, one global body to resolve in isolation. It takes, quite simply, a village to define these goals and implement solutions.

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AMAZING Tsunami Video Footage From Sea

This video shows the FORMATION of tsunamis caused by landslides from the large magnitude M7.5 Indonesian earthquake on September 28th, 2018 at 10:02hrs UTC (05:02hrs CST).

Caution as there are some upsetting images seen in the video footage.

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TEACHING MOMENT: interpreting the weather and 2 earthquakes!

TEACHING MOMENT :  Can you find two large earthquakes and the onset of a cold front passing through Houston “hidden” in this seismogram?  

A nice REAL WORLD example of signal convolution…. take a close look at the seismogram below.  Station E1TX detected and recorded two magnitude M>6.0+ earthquakes AND a cold front weather system passing thru Houston.  Can you identify the onset of these three events?  Two views are shown of the same seismogram but with different applied filters.  What could you do with the recorded data to make the events appear more distinctly?  Is that possible? 

Filtered at Low Pass – 10 sec

16102018_scrnsht2

Filtered at Low Pass – 15 sec

16102018_scrnsht

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TEACHING MOMENT F/U: Russian example of REAL WORLD basics of wave theory

TEACHING MOMENT FOLLOW-UP:  Have you been learning throughout the summer?  What basic wave theory concept is represented in this REAL WORLD example?  

Russia, and in particular Sakhalin Island, has been shaken by two recently large M6.0+ earthquakes.  The events occurred offshore, but were spatially proximal to a large oil & gas processing field.  Safety is always everyone’s first and foremost priority.  No damages nor injuries, thank goodness, have been reported from the pre-cursor and the primary event.  Station E1TX, operated by TXESP, recorded beautiful seismograms of these events.  Shown is one interpretation of the primary event which occurred at September 13th, 2018 at 11:10hrs UTC and a shallow 10kms deep.  Station E1TX is ~78 polar degrees away from the epicenter, shown below.

13102018_1110_screensht_RussiaPPT

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girlstart’s Houston Conference – Having Fun Learning Wave Theory!

“It was such a fun event and girls left feeling inspired and in awe of all of the awesome workshops they attended as well as all of the great role models they met. ” – Sharlym Gil, girlstart, Austin

It was an amazing experience for TXESP too!  The girls learned the basic characteristics of waves and the concept of wave attenuation.  We used rulers, maps of real world earthquake epicenters and a collection of seismograms to demonstrate this concept.  We reviewed seismic wave amplitude and wave frequencies.  You can see all photos from the day as well as a highlight video HERE

 

and TXESP’s curriculum….

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Haiti’s Recovery From 2 Earthquakes in Less Than 24 Hours – Damages and Losses

Within the past 24 hours, the devastatingly poor Caribbean country, Haiti, has experienced 2 moderate earthquakes.  The primary quake, a magnitude M5.9 event and 12kms deep, occurred at 00:11hrs UTC; a strong aftershock with a magnitude M5.2 occurred at 22:00hrs UTC.

The Washington Post and Reuters are both covering this human tragedy.  Damages are expected to be wide-spread in the poor country; 11 fatalities are known at this time.  Click below to read more about how strong and devastating Nature can be.

From Station E1TX, Operated by Texas Educational Seismic Project

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Damage and Fatality Reporting from:

Reuters and the Washington Post

 

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Join the Great American Shake Out: Texas

Are you prepared for an earthquake disaster? What would you do?  Where would you go?  >>>>  Join TXESP for ‘The Great American Shakeout: Texas (https://www.shakeout.org/texas/) on October 18th, 2018!

Millions of people worldwide will practice how to Drop, Cover, and Hold On
at 10:18 a.m. on October 18* during Great ShakeOut Earthquake Drills!

Texans can join them today by registering for the 2018 Great Texas ShakeOut. Participating is a great way for your family or organization to be prepared to survive and recover quickly from big earthquakes– wherever you live, work, or travel.

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Accepting Applications: Texas High School Aerospace Scholars

From Texas’ Girls Collaborative Project, please see the call for applications below:

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Dear High School Educators,

High School Aerospace Scholars (HAS) applications are now open! HAS is a once-in-a-lifetime experience for Texas high school juniors to explore careers at NASA, learn about what they might want to study in college, and unite with like-minded students across the state. Following a series of online lessons, the highest achieving students will be invited to an all-expenses-paid, week-long visit to NASA’s Johnson Space Center in Houston during the summer. Selected participants will plan a mission to Mars while receiving guidance from NASA scientists and engineers. Both the online and onsite portions are free to participants. 

How can you help?

  • Please encourage students at your school to apply for the program by visiting www.has.aerospacescholars.org. The website includes detailed program information, the student application, important dates, and a downloadable poster to spread the word to classrooms about this unique opportunity!
  • You can also learn more about the program by viewing the two available videos on our homepage:

o   What Can You See

o   A Journey of Discovery

  • Get the word out to students on the morning announcements, in parent newsletters, in the school newspaper, and on your school’s social media channels using the hashtag #NASAHAS!
  • Spread the word to fellow math, science, and technology teachers to recommend it to their students.

 If you have any questions, please contact us at jsc-aeroscho@mail.nasa.gov or you may contact me directly atJessica.A.Cordero@NASA.gov.

Cordially,
Thanks,
Jessica Cordero

Texas High School Aerospace Scholars
HAS Activity Manager

281-483-8252

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TEACHING MOMENT F/U: Real World Example of the P-wave Shadow Zone

TEACHING MOMENT FOLLOW-UP:  Have you steadily been learning over the summer and now Fall?  How closely have your observations compared to our interpretations? Our living planet has given us another real world moment ….   What basic solid earth principle is observable on this seismogram recorded at Station E1TX?

 

30092018_1052_extractRS_COMPAREppt_Fiji

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Indonesian Tsunami Video Footage

A MAJOR M7.5 earthquake, a tsunami, and ensuing moderate aftershocks, have hit Indonesia this morning at 10:02hrs UTC (05:02hrs CST).  While Americans slept or started their day, the dynamic and relentless Earth has shown Nature’s force.  Caution as there are some upsetting images seen in the video footage.

VIDEO FOOTAGE:

AND

https://www.mirror.co.uk/news/world-news/indonesia-earthquake-sulawesi-tsunami-video-13325140

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