Infrasound Pulsations in the Panama Canal
Smithsonian Tropical Research Institute
June 3, 2011
Equipment designed to detect tsunamis and earthquakes also detects background sounds including cars and the hum of the earth.
An unusual signal detected by the seismic monitoring station at the Smithsonian Tropical Research Institute's research facility on Barro Colorado Island results from waves in Lake Gatun, the reservoir that forms the Panama Canal channel, scientists report. Understanding seismic background signals leads to improved earthquake and tsunami detection in the Caribbean region where 100 tsunamis have been reported in the past 500 years.
Ultra-sensitive devices at the station pick up a large range of ground motion from felt earthquakes to nanometer-scale seismic background noise. The instruments at the station include very sensitive broadband seismometers used to detect distant earthquakes and low-gain accelerometers that measure ground movement and withstand violent local earthquakes and explosions.
The sensors detect signals from many different sources that include cars, boats and machinery operating up to several kilometers away. They also pick up the background "hum of the Earth" caused by ocean waves breaking on continental shelves around the world.
Scientists noticed that sensors on Barro Colorado recorded an intriguing wave pattern at an intermediate frequency. They suspected that this pattern could be caused by standing waves in Lake Gatun. Standing waves, also known as "seiches," are common in enclosed bodies of water like lakes and harbors where waves moving in opposite directions interact. By installing a water-level detection meter along the shoreline, researchers confirmed that changes in the water level of the lake correspond to the unusual seismic signal.
This is not the first report of seiches in Lake Gatun. Earlier reports correlated the release of methane gasses in the sediments below the canal to seiches and bottom currents in the lake. The Panama Canal Authority provided data about the depth of the Canal channel and of Lake Gatun that the authors used to model wave patterns in the lake.
Boat traffic and wind speed correlate with the unusual wave pattern, which was more common during the day than it was at night, but more information is needed to confirm what is actually causing the waves.
This report, published in the Journal of Geophysical Research, provides a new method to quantify the impact of water movements as recorded by land-based seismometers. A more exact understanding of the seismic signals resulting from water movements will improve estimates of other phenomena like tsunami impacts...
The standing wave resonance recorded as background data by the seismic monitors is directly induced by solar flare activity that becomes ambiently transduced by the Orion pyramids of Giza, Egypt, which accumulate all cosmic and terrestrial electromagnetic energy for the redistribution in a global pattern of resonance defined by the mandalas mapped throughout this site.
The Panama Canal (9.00N° 79.60°W) is 7,124 miles from Giza, or 28.6% of the Earth's mean circumference distance (of 24,892 miles). The infrasound resonance in this area will build erratically with solar flare activity as we approach the onset of magnetic reversal, to culminate in the dramatic events of December 22, 2012.
This website has covered many major stories involving infrasound resonance convergence points, including Llanidloes, Mawnan, Hull, Saffron Walden, Bridlington, Woodland, Bolton, Malta, Goa, Klai, Auckland, Sydney, Ontario, White Rock, Ranchlands, and in the US in Newport, Anderson, Kimberley, Rochester, Menomonee Falls, Pelham, Richmond, Wilmington, Virginia Beach, Nashville, Knoxville, Mobile, McCalla, northern Florida, Knob Noster, Denver, Seattle, Novato, Arroyo Grande and Atwater.
The cases have become so severe that spontaneous combustion of objects by piezoelectric induction has been recurring in spates - in areas such as Tenerife, Babura, Abuja, Bauchi, Lalapansi, Mapuve, Bodibe, Hopewell, Landovica, Longford, Hull, Egham, Wisbech, Glasgow, Messina, Peschici, Berici, across northern Greece, Ratria, Kakori, Mumbai, Kishtwar, Rangrik, Kota Baru, Kuala Lumpur, Santo Tomas, Adelaide, Sydney, Georgetown, La Pampa, Melipilla, and in the US in Seattle, Soudan SP, Minneapolis, Colorado Springs, Pueblo, Anderson, San Mateo, Vallejo, San Francisco, Santa Barbara, Clovis, Haverhill, Peabody, Brentwood and New York City.