Do Earthquakes cause Propagation dropouts? Can the RF-Seismograph see earthqakes?

Discussion in 'Amateur Radio News' started by VE7DXW, Feb 6, 2019.

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  1. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    Hi Everyone;

    Evidence has been mounting that it might be possible to detect earthquakes by measuring the changes in the ionosphere.

    The RF-Seismograph team has been collaborating with Earthquakes Canada to find a correlation between HF propagation and earthquakes. There were two distinct events that occurred on Nov 1st (M5.0 off the coast of Vancouver Island) and a M6.3 event on Nov 11. in the Atlantic.

    RF-Seismograph Plot displaying the time of the quake M5.0 event below
    The time is PST – 8h (4PM = 000UTC). The earthquake occurred on Oct 31 20:23PST (0423UT)

    Interesting are two things on this plot:
    a.) The rise of the 80m noise level starting at about 0100UTC (red)
    b.) The dropout of communications at about the same time (20m - mag, 30m – yel, 40m – grn)
    The buildup of the energy and the change can be seen about 1 to 2h in advance on the red plot, which measures 80m. After the quake the 80m stays disturbed for another 2h. After that the band recovers.

    The quake in the Atlantic – M6.3

    I have plotted out the day in question for the M6.3 event and I have found the exact same phenomena the I found on the M5 event, although not as pronounced. This could be partially because it was a deep quake and it most likely effects the ionosphere differently. There is also to consider the fact of the location.

    We only have one active monitoring station for now so our data is limited.

    The 80m rumble can be seen again skirting the event for +/-2h. The time of the quake is also different. It happens in the morning. That is when we have, what we call, grey-line conditions. Gray line is the line that separates day from night and during the changeover shortwave radio activity changes from quiet night time to noisy daytime (it is the best time for making long distance contacts).

    One can see that the 20m (mag) is suppressed until after the noise event. 40m (grn) is also suppressed for most of the event, but it is still there and changing hitting a min right after the quake.

    How is this possible? We can picture field lines extruding from the earthquake zone racing up into the ionosphere. Because we have charged particles (ionosphere) and the field extended from the surface of the planet (earthquake zone), they interact strongly. As we bounce radio signals of the ionosphere any change will affect the way the waves are received on the other side.

    How far reaching is the effect on the ionosphere during such a disturbance? It might be further than we expected!
    I believe we should investigate this further and will be posting updates as they come available. Comments are also welcome!

    Please join us at:
    and help explore the possibilities of the RF-Seismograph from your station!

    All the best and 73;

    Alex - VE7DXW and the MDSR Team
    KP4JM, N2NH, WZ7U and 2 others like this.
  2. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    Hi Everybody;

    This is a compilation of Seismic and RF-Seismograph archived recordings to match them and compare for the year 2016
    QNV stands for Quake not visible
    2016-08-18T09:09,visibe,Southern East Pacific Rise,M6.0
    2016-08-18T22:32,visibe,Southern East Pacific Rise,M6.0
    2016-08-20T19:45,visibe,South Georgia Island region,M6.1
    2016-08-23T16:36,visibe,10km SE of Norcia-Italy,M6.2
    2016-08-28T19:29,visibe,North of Ascension Island,M7.1
    2016-09-01T07:37,visibe,175km NE of Gisborne New Zealand,M7.0
    2016-09-13T16:58,visibe,visibe,32km ENE of Mutata Colombia,M6.0
    2016-09-16T16:20,visibe,51km NNW of Jayapura Indonesia,M6.0
    2016-09-20T07:21,visibe,Izu Islands Japan region,M7.1
    2016-10-20T20:07,visibe,6km S of Kurayoshi Japan,M6.2
    2016-10-25T11:18,visibe,132km WNW of Hihifo Tonga,.M6.1
    2016-10-27T11:32,is time correct?
    2016-11-07T20:55PST,visibe,42km WNW of Talcahuano Chile,M6.0
    2016-11-13T03:02,is time correct?
    2016-11-13T03:32,is time correct?
    2016-11-13T03:52,is time correct?
    2016-11-13T05:31,is time correct?
    2016-11-13T16:34,visibe,41km WSW of Kaikoura New Zealand,M6.5
    2016-11-21T12:59,visibe,35km ESE of Namie Japan,M5.9
    2016-11-24T10:43,is time correct?
    2016-11-25T06:24,is time correct?
    2016-12-01T14:40,is time correct?
    2016-12-06T02:03,is time correct?
    2016-12-07T21:15,visibe,58km SSE of Shihezi China,M6.0
    2016-12-08T06:49,visibe,164km W of Ferndale California,M6.6
    2016-12-08T13:56,visibe,79km WSW of Kirakira Solomon Islands,M6.5
    2016-12-09T10:10,visibe,92km WSW of Kirakira Solomon Islands,M6.9
    2016-12-17T15:27,visibe,168km SE of Taron Papua New Guinea,M6.3
    2016-12-18T01:47,is time correct?
    2016-12-20T04:33,is time correct?

    All the best;

    Alex - VE7DXW
    KP4JM and N9JOW like this.
  3. KD7KCP

    KD7KCP Ham Member QRZ Page

  4. AA5CT

    AA5CT Ham Member QRZ Page

    KF4ZKU and VE7DXW like this.
  5. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    That is actually a great idea. Do you know anyone that can facilitate that!

    KF4ZKU likes this.
  6. KO6KL

    KO6KL XML Subscriber QRZ Page

    one time the HF band noise level went way up before an earthquake I remember back in the '90s
    ( when the noise level was lower most of the time... before everyone had switching power supplies...
    KF4ZKU, G3SEA, MW1CFN and 1 other person like this.
  7. VE7DXW

    VE7DXW XML Subscriber QRZ Page

    Hi Everybody;

    This is a compilation of Seismic and RF-Seismograph archived recordings to match them and compare for the year 2017
    QNV stands for Quake not visible

    2017-01-03T13:52,226km SW of Nadi Fiji,M6.9
    2017-01-03T14:40,195km SW of Nadi Fiji,M6.0
    2017-02-10T0603,10km N of Mabua Philippines,M6.5
    2017-03-03T18:58,115km SSE of Panguna Papua New Guinea,M6.1
    2017-03-13T17:51 DST,230km SSW of Mohean India,M6.0
    2017-03-19T06:43,70km N of Auki Solomon Islands, M6.0
    2017-03-27T01:50,is time correct?
    2017-04-04T21:09,63km W of Attu Station Alaska,M6.2
    2017-05-01T03:31,88km WNW of Skagway Alaska,M6.2
    2017-05-01T05:18,88km WNW of Skagway Alaska,M6.3
    2017-05-02T19:47,29km NNW of Karakenja Tajikistan, M6.0
    2017-05-08T08:00,34km WSW of Tanaga Volcano Alaska,M6.2
    2017-05-08T016:54,111km ESE of Hirara Japan,M6.0
    2017-05-10T14:23,95km ENE of Visokoi Island, South Georgia and the South Sandwich Islands,M6.5
    2017-05-29T05:35,28km WNW of Kasiguncu Indonesia,M6.6
    2017-06-02T13:24,200km NW of Attu Station Alaska,M6.8
    2017-06-12T03:28,is time correct?
    2017-06-25T08:42,198km W of Pangai Tonga,M6.0
    2017-06-28T09:20,is time correct?
    2017-06-30T14:29,is time correct?
    2017-07-05T11:03,35km NNW of Bahia de Caraquez Ecuador,M6.0
    2017-07-10T22:00,204km NW of Auckland Island New Zealand,M6.6
    2017-07-16T14:34,is time correct?
    2017-07-19T04:16,is time correct?
    2017-07-20T13:31,11km ENE of Kos Greece,M6.6
    2017-07-26T01:32,is time correct?
    2017-07-27T08:53,is time correct?
    2017-08-08T04:19,is time correct?
    2017-08-08T14:27,is time correct?
    2017-08-26T19:17,109km NE of Lorengau Papua New Guinea,M6.3
    2017-09-02T18:30,21km ENE of Sungjibaegam North Korea,M6.3
    2017-09-19T16:43,247km W of Auckland Island New Zealand,M6.1
    2017-09-20T07:37,280km ESE of Kamaishi Japan,M6.1
    2017-09-23T03:53,is time correct?
    2017-10-05T22:59,5km NNE of San Jeronimo Ixtepec Mexico,M6.1
    2017-10-08T05:04,156km NW of Pangai Tonga,M6.1
    2017-10-08T11:48,Balleny Islands region,M6.2
    2017-10-10T09:53,Bouvet Island region,M6.7
    2017-10-18T03:00,104km SSE of Pangai Tonga,M6.1
    2017-10-31T2:50,41km WSW of Hila Indonesia,M6.1
    2017-11-01T03:09,110km E of Tadine New Caledonia,M6.1
    2017-11-04T01:00PST,93km NE of Hihifo Tonga,M6.8
    2017-11-08T11:42,165km ESE of Hachijo-jima Japan,M6.0
    2017-11-10T16:36,Ascension Island region,M6.1
    2017-11-12T10:18,29km S of Halabjah Iraq,M7.3
    2017-11-12T18:28,18km W of Parrita Costa Rica,M6.5
    2017-11-17T14:34,64km ENE of Nyingchi China,M6.4
    2017-11-19T01:25,82km E of Tadine New Caledonia,M6.3
    2017-11-19T07:09,74km E of Tadine, New Caledonia,M6.6
    2017-11-19T14:43,85km ENE of Tadine, New Caledonia,M7.0
    2017-11-19T16:09,96km E of Tadine New Caledonia,M6.0
    2017-11-20T10:51,is time correct?
    2017-11-29T22:32,Central Mid-Atlantic Ridge,M6.5
    2017-11-30T18:32,55km NNE of Kerman Iran,M6.1
    2017-12-03T03:19,18km NE of Bahia de Caraquez Ecuador,M6.1
    2017-12-07T16:22,50km NW of Fais Micronesia,M6.4
    2017-12-08T01:51,45km NW of Fais Micronesia,M6.3
    2017-12-09T07:14,50km NW of Fais Micronesia,M6.1
    2017-12-12T00:43,53km NNE of Kerman Iran,M6.0
    2017-12-12T13:41,63km NNE of Kerman Iran,M6.0
    2017-12-13T10:03,80km WNW of Bouvet Island Bouvet Island,M6.5
    KF4ZKU likes this.
  8. MW1CFN

    MW1CFN Ham Member QRZ Page

    Seismicity was one possible explanation for a very curious, highly-anomalous spot on 14MHZ WSPR in early January 2018, where two stations within 13km of one another (K6MCS and KJ6WSM) were heard at the same time when no other US station was being heard. It's very difficult to explain two spots from that close to one another when they are the only ones from hundreds of potential transmitters that were heard during night time conditions at 14MHz. The potential link from that area is, of course, the obvious seismicity of the far western US.
    Last edited: Feb 9, 2019
    N2NH and VE7DXW like this.
  9. VE7DXW

    VE7DXW XML Subscriber QRZ Page


    There is a lot happening in the lower band (<40m) that can be related to physical phenomena and I am still learning. With this new discovery I am realizing that the sun is only a small player in the whole scenario of propagation. It looks like earthquakes also have a vital role to play and if you measuring all quakes, even low ones (M2.0) the earth never stops shaking. There is a lot of noise that can be attributed to quakes and it would be interesting to see an RF-Seismograph in a active fault zone.

  10. KQ6XA

    KQ6XA Ham Member QRZ Page

    Hi Alex,
    If you really think "the sun is a small player in the whole scenario of propagation", then, indeed you do have a lot to learn.
    KE5ES, W1FVB, VE7JBX and 3 others like this.

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