EQTrace - An Interactive Worldwide Earthquake Atlas
EQTrace displays selected earthquake events from the publicly-available Earthquake Catalog portal of the United States Geological Survey (USGS) website, which contains quake records from January, 1900 to the present. Enter a date range, or specify all quakes within the previous week, day, or hour, select a magnitude and depth range, and optionally limit the search to a selected quadrangular geographic region. The app retrieves the desired set of quakes from the USGS database, and displays them on a 2-dimensional map or a 3-dimensional globe using colored markers that indicate quake location, magnitude and depth. You can view either a static display or run a simulation to show quake events as they occurred in chronological order.
This app is in production; Version 1.1 is available in the Microsoft Store. It is a Progressive Web Application (PWA) and can be downloaded in all browsers that support PWA technology. It runs on mobile devices as well.
EuroWarsAtlas - An Atlas of Conflicts in Europe and the Middle East, 1000 A.D. - 1700 A.D.
EuroWarsAtlas is an interactive map and database of major Conflicts occurring in Europe, the Middle East and western Asia between the years 1000 A.D. and 1700 A.D. Choose from a number of different Conflicts (for example, Hundred Years War, Italian Wars, Reconquista, etc), or specify a Date Range, or search for events containing a Keyword string in the title or description. The resulting battle events are represented on a 2-D map using markers to define the location. Click a marker to view details on the battle, and to access links to relevant imagery and Wikipedia articles. The Eurowars database contains over 1400 battle events and 388 digitized colored maps.
This app is in development; there is still much work to do in synthesizing descriptive historical information, and there are a few minor bugs. It is best suited for desktop displays, running the app in full screen mode in your favorite browser.
Time2Time - An Event Time Difference Calculator
Time2Time calculates the elapsed time between two Events (points in time). Once both the Start Event and End Event times are specified, the Calculator displays the time difference in years, months, days, hours, minutes and seconds. You specify Event date/time in any of three ways: Manual Entry Mode sets an Event through manual selection of the month, day, and year, and optionally the Event hour, minute and second; Current Time Mode sets an Event to the current local date and time, and Select Event mode allows you to choose from a list of existing Events. You can save any Event in Manual Entry mode for use in another session (for example, birthdays, major life events, etc). All dates between 1700 A.D. and 2200 A.D. are supported. You can specify an Event as occurring in any of the 37 internationally recognized Time Zones. The app also supports Daylight Savings Time (refer to the Documentation for details as well as caveats for all of these features).
The app is implemented for desktop browsers, tablets, and mobile devices. Enhancements for global clock corrections, (such as leap seconds and other anomalous conditions), is under development. The app currently assumes that all Event dates are with respect to the modern (Gregorian) Calendar.