Depth
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During recreational underwater activities such as snorkeling, underwater pool swims, and shallow free-diving, the Depth app can show the time, depth, water temperature, and the session's maximum depth while you've been underwater.
Underwater activities are risky. The Depth app isn't a dive computer and doesn't provide decompression stop information, gas analysis, or other recreational scuba diving functionality. If you're using Apple Watch Ultra where the failure of the device could lead to death, personal injury, or severe environmental damage, always use a secondary depth gauge and timer/watch. Before going on a dive, be sure that your Apple Watch Ultra is free of cracks or other damage.
The Depth app opens and begins a session when your Apple Watch Ultra is submerged to a depth of 1 meter or more. If you don't have the app set to open automatically, tap the Depth app, or press the Action button if you've configured it to open the Depth app, to start a session.
Your Apple Watch Ultra is designed to comply with EN13319. The Depth app works to a maximum depth of 130 feet (40 meters). If you go below this depth, the screen turns yellow, and some functions of your Apple Watch Ultra might stop working or might work intermittently. The depth sensor on Apple Watch Ultra is accurate to plus or minus 1 meter.
The strength of shaking from an earthquake diminishes with increasing distance from the earthquake's source, so the strength of shaking at the surface from an earthquake that occurs at 500 km deep is considerably less than if the same earthquake had occurred at 20 km depth.
Also, the depths of earthquakes gives us important information about the Earth's structure and the tectonic setting where the earthquakes are occurring. The most prominent example of this is in subduction zones, where plates are colliding and one plate is being subducted beneath another. By carefully plotting the location and depth of earthquakes associated with a subduction zone, we can see details of the zone's structure, such as how steeply it is dipping, and if the down-going plate is planar or is bending. These details are important because they give us insight into the mechanics and characteristics of the deformation in the subduction zone.
The deepest earthquakes occur within the core of subducting slabs - oceanic plates that descend into the Earth's mantle from convergent plate boundaries, where a dense oceanic plate collides with a less dense continental plate and the former sinks beneath the latter. The plate boundary contact between two such plates generate very large, shallow subduction zone earthquakes such as the Sumatra 2004 M9.1 event, and the 2011 M9.0 Japan earthquake, and is only active to relatively shallow depths - approximately 60 km. However, because oceanic slabs are relatively cold with respect to the surrounding mantle in deeper subduction zone environments, faults within the core of these slab remain brittle and can generate earthquakes to depths of as much as 700 km (e.g., Pacific Plate beneath Japan and Kamchatka, and beneath Tonga).
Accurately determining the depth of an earthquake is typically more challenging than determining its location, unless there happens to be a seismic station close and above the epicenter. So generally, errors on depth determinations are somewhat greater than on location determinations.
An earthquake cannot physically occur at a depth of 0 km or -1km (above the surface of the earth). In order for an earthquake to occur, two blocks of crust must slip past one another, and it is impossible for this to happen at or above the surface of the earth. So why do we report that the earthquake occurred at a depth of 0 km or event as a negative depth sometimes? First of all, the depth of an...
Ten kilometers is a "fixed depth". Sometimes data are too poor to compute a reliable depth for an earthquake. In such cases, the depth is assigned to be 10 km. Why that number? In many areas around the world, reliable depths tend to average 10 km or close to it. For example, if we made a histogram of the reliable depths in such an area, we'd expect to see a peak around 10 km. So if we don't know...
Two to three C2C in-depth partnerships will focus on clean energy topics. There will also be two Energyshed in-depth partnerships: one focused on a rural community and one focused on a metropolitan community.
The RFPs for in-depth technical partnerships became available Feb. 15, 2023. Questions about the partnerships and application process can be submitted directly through the RFP links, and answers will be made publicly available during the RFP period:
Proposal submissions are due by May 17. An initial webinar (recording below) offered information about the C2C program and in-depth partnership support. A second webinar is being held on April 5 from 1 to 2 p.m. MT to answer additional questions before the RFPs close. Register to attend the webinar on April 5, 2023.
C2C worked with Golden Valley Electric Association in Fairbanks, Alaska, to evaluate and de-risk its transition to clean energy options in a partnership that helped shape the current in-depth partnership offering.
Both vertical and horizontal scroll depth values may be used in the same trigger. Set scroll depths as either Percentages of the page height and width, or as Pixels. Enter one or more positive integers separated by commas, representing percentage or pixel values.
The U.S. Army Corps of Engineers is responsible for reporting the conditions of Federally maintained navigation channels. The New York District performs periodic surveys throughout our geographic area of responsibility to determine channel conditions. This information is then reported to the U.S. Coast Guard (USCG), National Oceanic and Atmospheric Administration (NOAA) and other government offices. The minimum controlling depths are shown by channel segments on standard forms, along with notes on the location of shoals and other critical information. Waterway users interested in channel conditions may refer to the most recent Reports of Channel Conditions provided below. The New York District is in the process of converting vertical datums used on its Controlling Depth Reports and Surveys from a local datum to the current epoch of MLLW (1983-2001). This process will take several years to complete. Mariners and other users of this information are advised to pay particular attention to the referenced datum.
The Depth API can power object occlusion, improved immersion, and novel interactions that enhance the realism of AR experiences. The following are some ways you can use it in your own projects. For examples of Depth in action, explore the sample scenes in the ARCore Depth Lab, which demonstrates different ways to access depth data. This Unity app is open-source on Github.
Occlusion, or accurately rendering a virtual object behind real-world objects, is paramount to an immersive AR experience. Consider a virtual Andy that a user may want to place in a scene containing a trunk beside a door. Rendered without occlusion, the Andy will unrealistically overlap with the edge of the trunk. If you use the depth of a scene and understand how far away the virtual Andy is relative to surroundings like the wooden trunk, you can accurately render the Andy with occlusion, making it appear much more realistic in its surroundings.
Depth can be used to improve hit-test results. Plane hit-tests only work on planar surfaces with texture, whereas depth hit-tests are more detailed and work even on non-planar and low-texture areas. This is because depth hit-tests use depth information from the scene to determine the correct depth and orientation of a point. 59ce067264
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