Earthquake Maps vs Antenna Reference

eQuake is a modern earthquake tracking app built to make seismic activity easier to follow, easier to understand, and more meaningful at a glance. With a live map, detailed event views, and advanced filtering tools, eQuake helps you follow recent seismic activity with greater clarity and explore events in a more informed way. It does more than display data. It turns seismic information into a cleaner, more readable, and more refined experience. Highlights - Live earthquake and seismic event map - Detailed event information - Filter by magnitude - Filter by date range - Filter by event type - Quickly center the map on your location - View your distance to an earthquake - View your distance to the nearest fault line - Instantly see last update time and event count One of eQuake's standout strengths is its multi-source data approach and advanced map visualizations. The app combines earthquake data from both USGS and EMSC, then refines it with its own merge logic to create a cleaner, more balanced, and more consistent event stream. This helps handle duplicate records more intelligently and delivers a more polished tracking experience. Advanced Map Layers - Active Fault Layer for viewing seismic activity in a richer geological context - Scatter Plot view for reading event distribution with greater clarity - Heat Map view for spotting regional intensity patterns at a glance - Mag Heat view for interpreting density and magnitude impact together eQuake presents earthquake data through a more refined visual language, making it easier to track recent seismic movement, explore events in greater depth, and follow multi-source data through a more elevated experience. Purchases are linked to your Apple Account and can be restored when eligible.

Antenna Reference App This App provides a comprehensive guide to antennas with a good selection of antennas to consider for construction. As well as the common dipole, 'V', Quad, Yagi and vertical antennas there are many others. The Discone, Windom, Zepp and J-Pole, the X-Beam and ZL Special - just to name a few. Also included are typical radiation patterns for each antenna, a wide range of impedance matching methods and a table of specifications for different coaxial cables and wire. The contents include basic antenna and propagation theory, transmission lines, and impedance matching. By providing measurements, built-in calculators take the guess-work out of antenna construction, impedance match design, and transmission line length. Pictures, either photographs or line drawings, are included for each antenna so you can see what the finished product should look like. There is a Data section which has tables of coaxial cable types, wire data for conversion between AWG and metric wire sizes as well as resistance values for ordinary copper wire. A quick explanation of the relationship between frequency and wavelength, and wiring diagrams for common connectors used in radio round out the content.