# Alerti - Earthquake & Tsunami — Location-Based Seismic Alerts

> Location-based seismic and tsunami alerts from official monitoring agencies. (iPhone/iPad app by SyncTechno Inc..)

- Source: https://appshunter.io/ios/app/alerti-earthquake-and-tsunami/id6769612792 (this page in markdown: same URL + `.md`)
- Developer: [SyncTechno Inc.](https://appshunter.io/developer/1896673430)
- Category: Weather, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 39 MB
- Languages: American English
- Released: 2026-05-27
- Data updated: 2026-09-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/alerti-earthquake-and-tsunami/id6769612792/reviews.md

## What is Alerti?

Alerti delivers earthquake and tsunami notifications based on your location, sourced directly from official seismic and tsunami monitoring agencies across the Asia-Pacific and beyond.

DATA SOURCES

Earthquake monitoring:
• USGS (U.S. Geological Survey) — global coverage
• KMA (Korea Meteorological Administration) — South Korea
• JMA (Japan Meteorological Agency) — Japan
• CWA (Central Weather Administration) — Taiwan
• BMKG (Badan Meteorologi, Klimatologi, dan Geofisika) — Indonesia

Tsunami monitoring:
• PTWC (Pacific Tsunami Warning Center / NOAA) — Pacific Ocean
• JMA — Japan coastal regions
• KMA — Korean coastal regions

Alerti polls these official sources frequently and sends a push notification when a new event is published. Detection and delivery times depend on the originating agency.

FEATURES

Home Feed
• Live list of unconfirmed and confirmed events
• 24-hour activity timeline
• Pull-to-refresh

Interactive Map
• View epicenters, intensity, and affected regions
• Tap any event for detailed information

Event Detail
• Magnitude, depth, and distance from your location
• Seismic intensity and magnitude type
• Tsunami wave height and arrival window (when available)
• Station count, source agency, and affected regions
• Step-by-step response guidance with visual pictograms
• Localized district-zoom map of the impact area

Customizable Alerts
• Toggle earthquake and tsunami alerts independently
• Set a minimum magnitude threshold (1.0 to 6.0)
• Choose alert radius from 10 km to 1,000 km
• Configure sound and vibration
• Schedule quiet hours

Safety Reporting
• "I'm Safe" button on event detail screens

Languages
Available in English, 한국어, 日本語, Bahasa Indonesia, Tiếng Việt, Filipino, and ไทย.

Other
• Dark mode
• Severity classification (Critical / Advisory) based on your magnitude threshold; tsunami events are always Critical

LOCATION USE
Alerti requests your location only while the app is open. It is used to compute distance from epicenters and decide which alerts are relevant. Your location is never shared with third parties.

IMPORTANT
Alerti is an informational app. It is not a substitute for official emergency warning systems issued by government agencies, such as J-Alert, ShakeAlert, or national Emergency Alert broadcasts. During a disaster, always follow guidance from local authorities.

Support: alerti@synctechno.com
Website: https://www.synctechno.com

## Key features

- Location-based seismic alerts
- Tsunami notifications
- Interactive event map
- Customizable alert thresholds
- Safety reporting feature
- Multi-language support

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/alerti-earthquake-and-tsunami/id6769612792/reviews.md

### 5/5 — 유용한 재난 앱

*2026-07-29*

까마귀도 귀엽고 위치 기반으로 알려주는 지진이 좋은 거 같아요

## Frequently asked questions about Alerti

### What is Alerti?

Alerti is a free application that provides real-time earthquake and tsunami notifications based on your current location. It pulls data from official seismic and tsunami monitoring agencies to keep you informed.

### Does Alerti have ads?

No, Alerti is completely ad-free. You can receive alerts and access all features without any interruptions from advertisements.

### How often is Alerti updated?

Alerti was last updated on July 30, 2026, with version 1.1.0. The app frequently polls official sources for new event data, ensuring timely notifications.

### What devices support Alerti?

Alerti is available for iPhone and iPod devices. It is designed to provide critical safety information on the go.

### Can I customize Alerti notifications?

Yes, you can customize alerts by toggling earthquake and tsunami notifications independently, setting a minimum magnitude threshold, and defining an alert radius from 10 km to 1,000 km.

### Is Alerti suitable for children?

Alerti has an age rating of 4+, making it suitable for younger users. The app provides clear safety guidance with visual pictograms.

### What data sources does Alerti use?

Alerti uses data from official agencies like USGS, KMA, JMA, CWA, BMKG for earthquakes, and PTWC, JMA, KMA for tsunamis, ensuring reliable and accurate information.

### How does Alerti use my location?

Alerti requests your location only when the app is open to calculate your distance from epicenters and determine relevant alerts. Your location is not shared with any third parties.

## Version history (last 2 releases)

### 1.1.0 — 2026-07-30

Alerti 1.1.0 Update
View the 10 latest disaster events worldwide and receive INFO notifications regardless of your current location.
Notifications now provide clearer essential information, including the affected area, magnitude, and intensity.
When regional intensity data is available from the reporting agency, it is visualized on the map with intensity-based colors and a legend.
Available tsunami risk information, including expected wave height, is displayed on the map and event details.
Improved current-location display and location controls on the map.
Evacuation action pictograms are now available in the response plan.
Alerts and disaster information follow the app language, while event times are shown in the device’s local time.
Improved alert severity classification and notification content.
Added the custom disaster notification sound and in-app update guidance.
Improved overall security, stability, and usability.

### 1.0 — 2026-05-28

No release notes.

## Related topics

[tsunami express](https://appshunter.io/ios/topics/tsunami-express) · [tsunami alert](https://appshunter.io/ios/topics/tsunami-alert) · [bmkg](https://appshunter.io/ios/topics/bmkg)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*