EEWS

Sep 12, 2018

From Cosmos to Core: Wiring the Abyss Expedition 2018

The deep sea holds answers to many scientific questions about the origin of life on Earth, our changing ocean, and even outer space. This year, Ocean Networks Canada’s (ONC) annual Wiring the Abyss expedition expanded infrastructure to monitor both deep sea and deep space⎯from the cosmos to the core⎯reaching new milestones for our offshore observatory in the northeast Pacific Ocean.

ONC’s annual maintenance expeditions allow for instrumentation to be added, maintained, and recovered, live streaming these deep sea operations in real time so everyone can #knowtheocean. Wiring the Abyss Leg 1, aboard Canadian Coast Guard ship John P. Tully,...

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Wiring the Abyss | neutrinos | hydrothermal vent | endeavour | cascadia | EEWS

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Wiring the Abyss Leg 2: 23 July – 3 August 2018

In July 2018, a team of 48 scientists, engineers, communicators, and crew aboard the exploration vessel Nautilus conducted around-the-clock operations to maintain and expand instrumentation on Ocean Networks Canada’s cabled observing systems off Canada’s west coast.

Highlights include an exciting new neutrino experiment at Cascadia Basin to determine whether this location can support a large-scale neutrino detector array in the future; expanded instrumentation at Endeavour, including new sensors and cameras to improve our understanding of this dynamic hydrothermal vent ecosystem; installation of the final earthquake early warning seafloor sensors at Cascadia Basin, Barkley Canyon, and Clayoquot...

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Wiring the Abyss | Leg 2 | neutrinos | endeavour | cascadia basin | sensors | EEWS

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Data from Alaska’s Magnitude 7.9 Earthquake and Tsunami

On 23 January 2018, a magnitude 7.9 earthquake occurred in the Gulf of Alaska at 1:35 am PT. A tsunami warning was issued for the west coast of Canada and the United States. The tsunami warning was cancelled at 4:40 am PT.

Ocean Networks Canada’s (ONC) real-time sensors detected the earthquake and the subsequent small tsunami that rippled out across the northeast Pacific (Figure 1).

magnitude 7.9 Alaskan earthquake

Figure 1. The relative timing of the magnitude 7.9 Alaskan earthquake and the subsequent small tsunami as detected by ONC real-time sensors.

The resulting tsunami wave was relatively small because this was a strike-slip...

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tsunami | earthquake | earthquake early warning | EEWS | Vancouver Island | alaska

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Earthquakes shed light on British Columbia’s early warning system

In September 2017, Ocean Networks Canada's (ONC) seismic sensors collected real-time information on two recent and very different earthquakes: one distant quake off Mexico’s west coast and a much smaller regional event near Ucluelet, British Columbia. Both seismic events provide insight into British Columbia’s earthquake early warning system, currently in development.

Early warning for Mexico’s magnitude 8.1 earthquake

On 7 September, a magnitude 8.1 earthquake struck off Mexico’s southwest coast near the Guatemalan border. ONC’s sensors detected the seismic waves over 4,700 kilometres away (Figure 1).

...
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EEWS | earthquake early warning | sensors | Mexico City | SASMEX | Nanometrics

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Deployed: the first spike for British Columbia's earthquake early warning system

In June 2016, Ocean Networks Canada (ONC) successfully deployed and connected the first of several earthquake early warning sensors on the Cascadia subduction zone. It will be part of a network of seismic sensors that ONC will install underwater and on land as part of an earthquake early warning system funded by Emergency Management British Columbia (EMBC).

The first EEWS sensor being deployed on the Cascadia Subduction Zone.

The first EEWS sensor being deployed on the Cascadia subduction zone.

In February...

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earthquake early warning | EEWS | Cascadia subduction zone | accelerometer | barkley canyon

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ONC detects M6.1 earthquake near Haida Gwaii

Seismic sensors on Ocean Networks Canada’s seafloor observatory installed offshore Vancouver Island detected an earthquake in the Northeast Pacific Ocean on the morning of 24 April 13:56:16 UTC (7:00 a.m. PDT) 

The magnitude 6.1 earthquake struck offshore the Haida Gwaii Region, with its epicentre about 280 kilometres south west of Prince Rupert, British Columbia.

Figure1:  ONC Earthquake Sensors and 24 April earthquake epicentre  ...

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earthquake | EEWS | earthquake early warning | Haida Gwaii

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