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Profil korisnika/ce mikamckinnon
Mika McKinnon
Mika McKinnon
Mika McKinnon
Ovjeren akaunt
@mikamckinnon

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Mika McKinnonOvjeren akaunt

@mikamckinnon

Field geophysicist, disaster researcher, scifi science consultant, science writer, public speaker, irrepressibly curious. #scicomm #womeninSTEM she/her 🇨🇦🇺🇸

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about.me/mikamckinnon
Vrijeme pridruživanja: lipanj 2009.

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    1. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
      • Prijavi Tweet

      Mika McKinnon je proslijedio/a tweet korisnika/ceUSGS Big Quakes

      This is big. But it’s also offshore, pretty much directly between Cuba, Jamaica, & the Cayman Islands. And it’s a strike-slip, so tsunami risk is low.https://twitter.com/USGSBigQuakes/status/1222241341188583424 …

      Mika McKinnon je dodan/na,

      USGS Big QuakesOvjeren akaunt @USGSBigQuakes
      Prelim M7.7 Earthquake Cuba region Jan-28 19:10 UTC, updates https://go.usa.gov/xdTes 
      16 replies 125 proslijeđenih tweetova 391 korisnik označava da mu se sviđa
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    2. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
      • Prijavi Tweet

      You get tsunami from any vertical displacement of the ocean fooor. That includes underwater mountains moving sideways, or submarine landslides triggered by the quake. Even “small” (cm tall) tsunami have nasty potentially-lethal currents. It’s a bad day to go to the beach.

      22 proslijeđena tweeta 56 korisnika označava da im se sviđa
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    3. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
      • Prijavi Tweet

      Mika McKinnon je proslijedio/a tweet korisnika/ceDr. Vasshe

      Panic & heart attack are VERY common after earthquakes. It’s how even not-so-damaging quakes still have fatalities. Solid generic disaster advice: Stay calm. Breathe. Force yourself to take that moment to think instead of panic. You know what to do.https://twitter.com/drvasshe/status/1222243955435196417 …

      Mika McKinnon je dodan/na,

      Dr. Vasshe @DrVasshe
      In a more serious note, she says there was small displacement of water near the coast in Cayman and at least one man was so frightened by the earthquake that she had a heart attack and had to be rushed to the hospital.
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      1 reply 21 proslijeđeni tweet 69 korisnika označava da im se sviđa
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    4. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
      • Prijavi Tweet

      If you ever feel the ground move: 1. Drop! or Lock (your mobility device)! 2. Cover! 3. Hold on! then figure out if it’s a quake or not. Don’t try to flee; you’ll just get hurt from lost balance. You’re covering to protect from falling objects (not collapsing buildings).pic.twitter.com/6T3onruXt7

      Infographic of how to shelter using a variety of mobility aids
      1 reply 45 proslijeđenih tweetova 80 korisnika označava da im se sviđa
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    5. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
      • Prijavi Tweet

      If you felt this earthquake (or were in the region and DIDN’T feel it!), please fill out a Did You Feel It? report. Getting your impressions helps us understand how local geology & buildings respond to quakes, enhancing our ability to understand risk. https://earthquake.usgs.gov/earthquakes/eventpage/us60007idc/tellus …

      24 proslijeđena tweeta 46 korisnika označava da im se sviđa
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    6. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
      • Prijavi Tweet

      Mika McKinnon je proslijedio/a tweet korisnika/ceDr. Lucy Jones

      If you’re ever at the beach & feel shaking, get to high ground as soon as shaking stops. Earthquakes are the early warning system for tsunami, faster than any emergency call or siren. A tsunami might not happen, but why chance it? I’d always rather look foolish than die.https://twitter.com/DrLucyJones/status/1222243393847169024 …

      Mika McKinnon je dodan/na,

      Dr. Lucy JonesOvjeren akaunt @DrLucyJones
      The M7.7 Jamaican quake produced sideways motion on the fault, so the tsunami risk is low. (Seafloor should move up to make tsunami.) But if I'm ever at the beach and feel strong shaking, I move to high ground. Downside is I lose a day at the beach. The upside could be my life.
      36 proslijeđenih tweetova 102 korisnika označavaju da im se sviđa
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      Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
      • Prijavi Tweet

      Current tsunami status is “We see some waves, but they might be normal waves.” Updates: https://ptwc.weather.gov/ptwc/product_listing.php?region=3 … Tsunami are characterized by their long wavelength, not their wave height. Small ones can be challenging to identify, but can still generate powerful currents.pic.twitter.com/efpFzJPcGe

      12:20 - 28. sij 2020.
      • 12 proslijeđenih tweetova
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      • Alex! Christina Chanae Ian McCombs $XVG-Socialist for Bernie Gretchen🌻 Coffee and a Phone CynicL1☮️❤️😊 JustAGuy Heather 🌊
      12 proslijeđenih tweetova 41 korisnik označava da mu se sviđa
        1. Novi razgovor
        2. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          People imagine tsunami as these giant curling waves that slam into a coast, each wave smaller than the last. 🌊 But they’re more like a rapidly-rising tide ebbing & inudating for hours, with the potential of ANY wave being the largest. They can be centimetres tall yet fierce.

          20 proslijeđenih tweetova 57 korisnika označava da im se sviđa
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        3. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          Tsunami have enormous wavelengths compared to the depth of the ocean, so mechanically they’re shallow-water waves Once we spy them, we’re very good at predicting how quickly they’ll arrive where. But measuring displacement is hard, so we don’t know height until they reach shore

          13 proslijeđenih tweetova 53 korisnika označavaju da im se sviđa
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        4. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          If you’re in the region and freaking out about this close call, I have excellent news! You’re about to have a region-wise tsunami training and drill on March 19, 2020 Register & learn more: https://www.tsunamizone.org/register/ 

          1 reply 13 proslijeđenih tweetova 30 korisnika označava da im se sviđa
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        5. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          The whole region is a bit of a complicated tectonic mess. This quake was likely on the Oriente Fault, where the North America plate moves west-southwest compared to the Caribbean plate at ~1.9 cm/yr (slow but normal). It’s had large quakes in the last century, but not this largepic.twitter.com/XwC60FePw5

          Tectonic makes of the Caribbean with plates and boundaries
          22 proslijeđena tweeta 55 korisnika označava da im se sviđa
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        6. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          Mika McKinnon je proslijedio/a tweet korisnika/ceJascha Polet

          Ah. Yeah. That’s a tsunami. Stay out of the water. It’s too small to chase you inland, but smaller tsunami than this have killed people who waded in.https://twitter.com/CPPGeophysics/status/1222258264265461761 …

          Mika McKinnon je dodan/na,

          Jascha Polet @CPPGeophysics
          Sea level monitoring station close to the Jamaica M7.7 quake is showing a significant signal of about +-0.6 m http://www.ioc-sealevelmonitoring.org/station.php?code=geor … pic.twitter.com/elHwMS19YW
          348 proslijeđenih tweetova 675 korisnika označava da im se sviđa
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        7. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          Q: How can a centimeter-tall tsunami kill anyone?! That’s so small you can’t even see it under noise of wind waves! A: Small tsunami don’t reach far inland (and may even be contained to the beach), but it’s still a LOT of water moving quickly. The currents are VERY strong.

          5 replies 27 proslijeđenih tweetova 110 korisnika označava da im se sviđa
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        8. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          If a tsunami matches resonance frequency of an inlet or habour, it builds into a seiche. When the peaks of incoming and outgoing waves align, that constructive interference amplify wave height. Think of scooting back & forth in a tub, or driving a swing to go higher & higher.pic.twitter.com/rH5P4yVsm2

          11 proslijeđenih tweetova 91 korisnik označava da mu se sviđa
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        9. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          Mika McKinnon je proslijedio/a tweet korisnika/ceBrian Terbush

          Just like how a tsunami can match resonance frequency of an inlet, sometimes an earthquake will match resonance frequency of an earthquake. We try to design buildings to NOT match expected dominant quake frequency for a region, but that’s very tricksy.https://twitter.com/theterbush/status/1222263427193683968 …

          Mika McKinnon je dodan/na,

          Brian Terbush @theterbush
          Appropriate timing for sharing this, @IRIS_EPO. Longer period earthquake waves travel farther, and also shake taller buildings more - this helps explain the shaking experienced in the tall buildings in Florida from the Caribbean #Earthquake. Remember - drop, cover, and hold on! https://twitter.com/IRIS_EPO/status/1222154833031061513 …
          1 reply 7 proslijeđenih tweetova 42 korisnika označavaju da im se sviđa
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        10. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          Q: How can such a big earthquake produce such a small tsunami?! A: Imagine you’re splashing a friend. Do you wave your arms back & forth in the water, or slam them up & down? Liquids transmit pressure waves but not shear waves. Side-to-side motion doesn’t do much.pic.twitter.com/5HygflwOeM

          20 proslijeđenih tweetova 77 korisnika označava da im se sviđa
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        11. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 28. sij
          • Prijavi Tweet

          Q: Which of these earthquakes are aftershocks? Are any foreshocks? Ahhhh! A: When a fault moves, it builds up stress on the locked ends. That stress redistributes as more earthquakes. But the Earth is Very Big. An earthquake only influences a radius of ~3x its fault length.

          7 proslijeđenih tweetova 35 korisnika označava da im se sviđa
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        12. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 29. sij
          • Prijavi Tweet

          Ready for math? The Puerto Rico earthquake swarm were happening on ~25km fault, so had an influence of ~75km. Today’s Cuba/Jamaica/Cayman Islands quake was ~1300km away. That’s Too Far. Therefore, the Puerto Rico swarm weren’t foreshocks for today’s quake. They’re unrelated.pic.twitter.com/iUUHLyZDXS

          Context map of seismic activity within the Caribbean region within the last month showing a cluster at Puerto Rico, and a cluster near the Cayman Islands
          17 proslijeđenih tweetova 57 korisnika označava da im se sviđa
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        13. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 29. sij
          • Prijavi Tweet

          But! Today’s M7.7 likely involved a 150+ km fault, giving it 450km radius for stress redistribution. The later M6.5 is ~200km away on the same fault: within ~3x the fault length. It’s related. Unfortunately, we only know foreshock vs aftershock retroactively.pic.twitter.com/RlOseTqTvI

          Close up of just today’s seismic activity around the Cayman Islands
          Map outlining the potential fault movement area of 150 km.
          15 proslijeđenih tweetova 40 korisnika označava da im se sviđa
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        14. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 29. sij
          • Prijavi Tweet

          I think of aftershocks as a pile of puppies with all of them jostling around to get comfy. The number of aftershocks decays with time, just like puppies settling down to sleep. Unless someone thwack a nose. Unlikely in this scenario, but technically possible.pic.twitter.com/V7Kpdhb9In

          5 replies 9 proslijeđenih tweetova 47 korisnika označava da im se sviđa
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        15. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 29. sij
          • Prijavi Tweet

          I’m getting pinged with mislabelled footage of prior disasters. Please be careful to assess the credibility of your sources prior to boosting sensational images or claims. Please also consider the ethics of supporting disaster porn that exploits pain.

          16 proslijeđenih tweetova 75 korisnika označava da im se sviđa
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        16. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 29. sij
          • Prijavi Tweet

          Q: Is it safe for me to go on my Caribbean vacation?! A: ...wanna give me your tickets? I’ll take your place! You need to make your own risk assessments and I haven’t seen an aftershock forecast, but in all likelihood we’ve already seen the biggest & worst of this sequence.

          1 reply 1 proslijeđeni tweet 38 korisnika označava da im se sviđa
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        17. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 29. sij
          • Prijavi Tweet

          Mika McKinnon je proslijedio/a tweet korisnika/ceIRIS Earthquake Sci

          Q: But why all these earthquakes?! A: It’s normal. You’re just paying attention this time. Every year, we get roughly 0-2 M8+, 10-20 M7, 100-200 M6, 1000-2000 M5, & even more M3 or smaller earthquakes, mostly on tectonic boundaries. Somewhere is always shaking.https://twitter.com/IRIS_EPO/status/1222319054679171077 …

          Mika McKinnon je dodan/na,

          IRIS Earthquake Sci @IRIS_EPO
          Animation showing 20 years of M4+ earthquakes in the region of the M7.7 #JamaicaEarthquake. Created using the IRIS Interactive Earthquake Browser. https://youtu.be/TYaRH37RibU  pic.twitter.com/ZvF7KDAk2v
          29 proslijeđenih tweetova 78 korisnika označava da im se sviđa
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        18. Mika McKinnon‏Ovjeren akaunt @mikamckinnon 31. sij
          • Prijavi Tweet

          Mika McKinnon je proslijedio/a tweet korisnika/ceEmily Wolin

          Here’s the Earth, ringing like a bell. A very, very quiet bell.https://twitter.com/geoginger/status/1223288869338210304 …

          Mika McKinnon je dodan/na,

          Emily Wolin @GeoGinger
          After big earthquakes, long-period surface waves keep circling the globe for DAYS. Here's a continuous wavelet transform of two days of data from GSN station IU.ANMO following Tuesday's M7.7 in the Caribbean. pic.twitter.com/tErK472C7e
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          0 replies 2 proslijeđena tweeta 21 korisnik označava da mu se sviđa
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