Document Version: 1.0
Date: 2025
Author: Product Team
Status: Proposal
This PRD outlines the proposed enhancements and new features for Version 2.0 of the Vulcão de Santa Barbara Shake application. The focus is on improving user experience, adding advanced filtering and analysis capabilities, and enhancing accessibility and mobile usability.
- Improve user experience and interface usability
- Add advanced filtering and search capabilities
- Enhance mobile and tablet experience
- Provide statistical insights and data export
- Implement push notifications for significant events
- Improve accessibility and internationalization
- 40% increase in user engagement (time spent on app)
- 60% improvement in mobile user satisfaction
- 30% increase in return users
- 50% reduction in user-reported usability issues
- Clean, intuitive 3D visualization
- Real-time data from IPMA
- Interactive timeline animation
- PWA support for offline access
- Mobile Experience: Fixed sidebar width (300px) doesn't work well on mobile devices
- Limited Filtering: No way to filter by magnitude, depth, or date range
- No Search: Cannot search for specific earthquakes
- Statistics Missing: No summary statistics or trends
- No Export: Cannot export data for analysis
- Accessibility: Limited keyboard navigation and screen reader support
- No Notifications: Users must manually check for new earthquakes
- Limited Context: No comparison with historical data
- No Settings: Cannot customize view preferences
- Language: Only Portuguese, limiting international use
- Name: Dr. Maria Silva
- Role: Seismologist/Geologist
- Needs: Detailed data, export capabilities, statistical analysis
- Goals: Analyze patterns, export data for research, compare time periods
- Name: João Santos
- Role: Local resident
- Needs: Easy-to-understand information, notifications for significant events
- Goals: Stay informed about seismic activity, understand risk levels
- Name: Ana Costa
- Role: Teacher/Educator
- Needs: Clear visualizations, educational content, shareable links
- Goals: Teach students about seismology, share visualizations
Priority: High
Effort: Medium
Requirements:
- Implement responsive sidebar that:
- Collapses to icon-only mode on mobile (< 768px)
- Becomes a bottom sheet/drawer on mobile
- Maintains full functionality in all modes
- Add hamburger menu for mobile navigation
- Implement touch-friendly controls (larger tap targets, swipe gestures)
- Optimize 3D plot for smaller screens (adjustable camera presets)
Acceptance Criteria:
- Sidebar is fully functional on screens as small as 320px width
- 3D plot remains interactive and readable on mobile devices
- All controls are accessible with touch input
- No horizontal scrolling on any device
Priority: High
Effort: Medium
Requirements:
- Add collapsible sections:
- Filters panel (collapsible)
- Statistics panel (collapsible)
- Settings panel (collapsible)
- Implement sticky header with key information
- Add "Clear filters" button
- Show active filter count badge
Acceptance Criteria:
- Sidebar can be collapsed/expanded
- All panels can be toggled independently
- Active filters are clearly indicated
- Sidebar state persists across sessions
Priority: Medium
Effort: Low
Requirements:
- Add skeleton loading states for list items
- Implement progress indicator during data fetch
- Show friendly error messages with retry option
- Add offline indicator when API is unavailable
- Display last successful update timestamp
Acceptance Criteria:
- Users see loading indicators during data fetch
- Errors are clearly communicated with actionable steps
- Offline state is clearly indicated
- Users can manually refresh data
Priority: High
Effort: Medium
Requirements:
- Full keyboard navigation support:
- Tab through all interactive elements
- Arrow keys to navigate earthquake list
- Enter/Space to select items
- Escape to close modals/panels
- ARIA labels for all interactive elements
- Screen reader announcements for:
- New earthquakes detected
- Filter changes
- Animation state changes
- High contrast mode option
- Focus indicators for all interactive elements
Acceptance Criteria:
- Application is fully navigable with keyboard only
- Screen reader users can access all functionality
- WCAG 2.1 AA compliance achieved
- Focus indicators are visible and clear
Priority: High
Effort: High
Requirements:
- Magnitude Filter:
- Range slider (0.0 to 6.0+)
- Quick filter buttons (2.0+, 3.0+, 4.0+, 5.0+)
- Show count of filtered results
- Depth Filter:
- Range slider (0 to 30+ km)
- Quick filter buttons (Surface, Shallow <5km, Medium 5-15km, Deep >15km)
- Date Range Filter:
- Preset options: Last 7 days, 14 days, 30 days, 60 days, 90 days
- Custom date range picker
- Show data availability indicator
- Distance Filter:
- Adjustable radius (5km to 50km)
- Visual indicator on map
- Combined Filters:
- All filters work together (AND logic)
- Show active filter summary
- Save filter presets
Acceptance Criteria:
- All filters update visualization in real-time
- Filter combinations work correctly
- Filter state persists in URL (shareable links)
- Performance remains smooth with filters applied
Priority: Medium
Effort: Low
Requirements:
- Search bar in sidebar header
- Search by:
- Date/time (e.g., "2025-01-15", "yesterday")
- Magnitude (e.g., ">3.0", "4.5")
- Depth (e.g., "<5km")
- Region keywords
- Highlight search results in list
- Auto-focus first result
- Clear search button
Acceptance Criteria:
- Search is fast and responsive
- Results are highlighted
- Search works with active filters
- Search history (optional)
Priority: High
Effort: Medium
Requirements:
- Summary Cards:
- Total earthquakes in current view
- Average magnitude
- Strongest earthquake (magnitude, date, depth)
- Deepest earthquake
- Shallowest earthquake
- Most recent earthquake
- Charts:
- Magnitude distribution (histogram)
- Depth distribution (histogram)
- Timeline chart (earthquakes per day)
- Magnitude vs Depth scatter plot
- Trends:
- Compare with previous period (e.g., last 30 days vs previous 30 days)
- Show increase/decrease percentages
- Export Statistics:
- Download statistics as CSV/JSON
Acceptance Criteria:
- Statistics update in real-time with filters
- Charts are interactive (click to filter)
- Statistics panel is collapsible
- Data is accurate and formatted correctly
Priority: Medium
Effort: Low
Requirements:
- Export filtered/visible earthquakes to:
- CSV format (with all metadata)
- JSON format (full data structure)
- GeoJSON format (for GIS applications)
- Export options:
- Current filtered view
- All data in time range
- Selected earthquakes only
- Include metadata in export:
- Export timestamp
- Applied filters
- Data source attribution
Acceptance Criteria:
- Exports are correctly formatted
- All relevant data is included
- File downloads work on all browsers
- Large datasets export without performance issues
Priority: Medium
Effort: High
Requirements:
- Notification Settings:
- Enable/disable notifications
- Magnitude threshold (default: 3.0)
- Notification frequency (immediate, hourly digest, daily digest)
- Sound preferences
- Notification Types:
- New earthquake above threshold
- Significant earthquake detected (4.0+)
- Multiple earthquakes in short period (swarm detection)
- Notification Content:
- Magnitude, depth, time
- Distance from center
- Link to view in app
- Background Sync:
- Service worker checks for new data periodically
- Only when app is installed as PWA
- Respects user's notification preferences
Acceptance Criteria:
- Notifications work when app is closed (PWA)
- Users can customize notification preferences
- Notifications are accurate and timely
- Battery usage is optimized
Priority: Low
Effort: Medium
Requirements:
- Compare current period with:
- Previous period (e.g., last 30 days vs previous 30 days)
- Same period last year
- Custom date range
- Visual comparison:
- Side-by-side statistics
- Overlay mode in 3D plot (different colors)
- Timeline comparison chart
- Show differences:
- Count difference
- Average magnitude difference
- Activity pattern changes
Acceptance Criteria:
- Comparison data loads efficiently
- Visual comparison is clear and understandable
- Historical data is clearly labeled
- Performance remains good with comparison enabled
Priority: Medium
Effort: Low
Requirements:
- Share Options:
- Share current view (with filters applied)
- Share specific earthquake
- Share statistics snapshot
- Share Methods:
- Copy link to clipboard
- Share via native share API (mobile)
- Generate QR code
- Export as image (screenshot of 3D plot)
- Shareable Links:
- Include filter state in URL
- Include selected earthquake in URL
- Include view settings (camera angle, etc.)
- Links are readable and shareable
Acceptance Criteria:
- Shared links restore exact view state
- Share works on all platforms
- Links are short and user-friendly
- Image exports are high quality
Priority: Medium
Effort: Medium
Requirements:
- Visualization Settings:
- Color scheme options (default, high contrast, colorblind-friendly)
- Point size multiplier
- Show/hide volcano cone
- Show/hide compass
- Show/hide surface plane
- Animation speed
- Data Settings:
- Auto-refresh interval (off, 1min, 5min, 15min, 30min)
- Default time range
- Default radius
- Default magnitude filter
- UI Settings:
- Language (Portuguese, English, Spanish)
- Sidebar position (left, right, bottom on mobile)
- Theme (dark, light, auto)
- Font size
- Accessibility Settings:
- High contrast mode
- Reduced motion
- Screen reader optimizations
Acceptance Criteria:
- All settings persist across sessions
- Settings apply immediately
- Settings are clearly organized
- Default settings work well for new users
Priority: Low
Effort: Low
Requirements:
- Interactive Legend:
- Click legend items to filter
- Show/hide elements
- Color scale explanation
- Help System:
- Tooltips on hover for all controls
- "Getting Started" tour (first-time users)
- Help panel with:
- How to use filters
- How to interpret colors
- How to read the 3D plot
- Keyboard shortcuts
- FAQ section
- Contextual Help:
- "?" icons next to complex features
- Inline explanations for technical terms
Acceptance Criteria:
- Help is easily accessible
- Content is clear and non-technical
- Tour can be skipped and restarted
- Help content is searchable
Priority: Low
Effort: Medium
Requirements:
- Support for languages:
- Portuguese (current)
- English
- Spanish (for broader Azores audience)
- Localized content:
- All UI text
- Date/time formats
- Number formats
- Error messages
- Language selector in settings
- Detect browser language on first visit
Acceptance Criteria:
- All text is translated
- Date/time formats match locale
- Language preference persists
- No untranslated strings visible
- Initial load time: < 2 seconds
- Filter application: < 100ms
- 3D plot rendering: 60 FPS
- Data fetch: < 1 second
- Export generation: < 2 seconds for 1000 earthquakes
- Chrome/Edge: Latest 2 versions
- Firefox: Latest 2 versions
- Safari: Latest 2 versions (iOS 14+)
- Mobile browsers: Chrome, Safari, Firefox
- Cache API responses for 5 minutes
- Implement request debouncing for filters
- Lazy load historical comparison data
- Optimize 3D plot rendering for large datasets
- No user data collection
- No analytics without consent
- Secure API connections (HTTPS)
- Service worker security best practices
- Mobile: < 768px (sidebar becomes drawer)
- Tablet: 768px - 1024px (collapsible sidebar)
- Desktop: > 1024px (full sidebar)
- Filter Active: #4ea3ff (blue)
- Success/Positive: #4caf50 (green)
- Warning: #ff9800 (orange)
- Error: #f44336 (red)
- Info: #2196f3 (light blue)
- Consistent button styles
- Form input components
- Modal/dialog components
- Toast notification system
- Loading spinner variants
- Responsive design overhaul
- Enhanced sidebar with collapsible panels
- Loading states and error handling
- Basic accessibility improvements
- Advanced filtering system
- Search functionality
- Statistics dashboard
- Settings panel
- Data export functionality
- Share functionality
- Enhanced legend and help system
- Internationalization
- Push notifications
- Historical comparison
- Performance optimization
- Testing and bug fixes
- Mobile usability score > 90/100
- Accessibility score (Lighthouse) > 95/100
- User satisfaction rating > 4.5/5
- Task completion rate > 90%
- Lighthouse Performance score > 90/100
- All interactions respond in < 100ms
- No memory leaks during extended use
- Works offline (PWA) for 24+ hours
- All high-priority features implemented
- All medium-priority features implemented
- At least 50% of low-priority features implemented
- Zero critical bugs
- Risk: Performance degradation with large datasets
- Mitigation: Implement virtualization, data pagination, progressive loading
- Risk: Browser compatibility issues
- Mitigation: Extensive testing, polyfills where needed
- Risk: API rate limiting
- Mitigation: Implement caching, request throttling
- Risk: Feature overload confusing users
- Mitigation: Progressive disclosure, good defaults, help system
- Risk: Mobile performance issues
- Mitigation: Optimize 3D rendering, lazy load, reduce initial payload
- Multi-volcano support (other Azores volcanoes)
- Real-time data streaming (WebSocket)
- Community features (user annotations, reports)
- Machine learning predictions
- Integration with other data sources (weather, tides)
- Advanced 3D visualizations (fault lines, tectonic plates)
As a researcher, I want to:
- Export filtered earthquake data so I can analyze it in external tools
- Compare current activity with historical periods so I can identify patterns
- Filter by multiple criteria simultaneously so I can focus on specific event types
As a concerned citizen, I want to:
- Receive notifications for significant earthquakes so I can stay informed
- Understand what the data means so I can assess risk appropriately
- Share specific earthquakes with others so I can discuss events
As an educator, I want to:
- Export visualizations as images so I can use them in presentations
- Access help content so I can explain features to students
- Use the app in multiple languages so I can reach diverse audiences
- Plotly.js (existing, may need update)
- Service Worker API (existing)
- Web Notifications API (new)
- Web Share API (new)
- IndexedDB (for local data caching, new)
- URL SearchParams API (for shareable links, new)
- Should notifications require user authentication?
- What is the maximum dataset size we should support?
- Should we implement user accounts for saved preferences?
- Do we need a backend for notification delivery?
Document End
This PRD is a living document and should be updated as requirements evolve.