Log of Detected Earthquakes 
Citizen Weather Observer Program (CWOP)
National Weather Service
Weather UndergroundRaspberryShake-4D RD29A Earthquake Log Summary
(RD29A) in Chino Hills | This is a summary of the earthquakes that have been detected by RaspberryShake-4D RD29A located in Chino Hills, Ca. (Full log here). Rows with bold lettering triggered the alarm on the live stream. If the Ratio (Current signal level/Average signal level for the past 20 seconds) is more than 4 for more than 1.5 seconds, the alarm is triggered. The larger the Ratio, the larger the seismic signal that first arrived at the seismograph. Rows in non-bold italics did not trigger the alarm, but were recorded by the RaspberryShake. I have only started to log non-alarm quakes since 7/21/20. So, the log before this date is incomplete (My RaspberryShake 4D came online in October 2017). Additions to the logs are not automated. So, new quakes will be posted as soon as possible. |
| Data from USGS |  Local Chino Hills Seismograph RasberryShake 4D RD29A |
| Earthquakes within 200mi of Chino Hills, Ca | Recent Chino Hills Seismic Activity |
| Southern California Daily Earthquake Count | Log of Detected Earthquakes |
| Worldwide Mag 5+ Current & Historical Values | Map of Detected Earthquakes |
| Log Summary of Detected Quakes | |
| Graph of Magnitude vs Distance |
RaspberryShake-4D RD29A Log Summary for August 2026
Select Month and Year to view a monthly summary. Select only a Year to view a yearly summary.
View the full log hereNumber of Earthquakes Detected by Magnitude
| 0.0 - 0.9 | 1.0 - 1.9 | 2.0 - 2.9 | 3.0 - 3.9 | 4.0 - 4.9 | 5.0 - 5.9 | 6.0 - 6.9 | 7.0 - 7.9 | 8.0+ | Total |
|---|---|---|---|---|---|---|---|---|---|
| 0 | 3 | 4 | 1 | 0 | 1 | 1 | 0 | 0 | 10 |
Top 5 Largest Magnitudes Detected
| Date | Time | Ratio | Event | Depth Km | Dist Mi | Dist Km | Images |
|---|---|---|---|---|---|---|---|
| 08-05-2026 | 00:56:01 | M 6.3 - south of the Kermadec Islands | 226.1 | 6,202 | 9,982 |  |
|
| 08-02-2026 | 06:13:04 | M 5.1 - 60 km W of Bahía de Lobos, Mexico | 10.0 | 601 | 968 |  |
|
| 08-01-2026 | 09:51:29 | 16.36 | M 3.3 - 17 km E of Desert Hot Springs, CA | 7.3 | 79 | 127 | |
| 08-02-2026 | 20:51:09 | M 2.5 - 3 km N of Gardena, CA | 11.2 | 35 | 57 |  |
|
| 08-01-2026 | 00:24:05 | M 2.4 - 3 km NNW of Frazier Park, CA | 11.8 | 95 | 153 |  |
Top 5 Smallest Magnitudes Detected
| Date | Time | Ratio | Event | Depth Km | Dist Mi | Dist Km | Images |
|---|---|---|---|---|---|---|---|
| 08-01-2026 | 16:16:26 | M 1.3 - 10 km E of Yorba Linda, CA | 10.3 | 4.3 | 6.9 |  |
|
| 08-07-2026 | 02:31:46 | 14.34 | M 1.5 - 5 km SE of Ontario, CA | 5.5 | 7.8 | 12.5 |  |
| 08-09-2026 | 04:44:36 | M 1.7 - 5 km WSW of Devore, CA | 10.3 | 22 | 36 |  |
|
| 08-02-2026 | 03:45:39 | M 2.1 - 8 km WNW of Camp Pendleton South, CA | 16.0 | 50 | 81 |  |
|
| 08-02-2026 | 02:32:00 | M 2.2 - 7 km SW of Idyllwild, CA | 16.2 | 55 | 89 |  |
Top 5 Farthest Detected
| Date | Time | Ratio | Event | Depth Km | Dist Mi | Dist Km | Images |
|---|---|---|---|---|---|---|---|
| 08-05-2026 | 00:56:01 | M 6.3 - south of the Kermadec Islands | 226.1 | 6,202 | 9,982 | |
|
| 08-02-2026 | 06:13:04 | M 5.1 - 60 km W of Bahía de Lobos, Mexico | 10.0 | 601 | 968 | |
|
| 08-01-2026 | 00:24:05 | M 2.4 - 3 km NNW of Frazier Park, CA | 11.8 | 95 | 153 | |
|
| 08-01-2026 | 09:51:29 | 16.36 | M 3.3 - 17 km E of Desert Hot Springs, CA | 7.3 | 79 | 127 | |
| 08-02-2026 | 02:32:00 | M 2.2 - 7 km SW of Idyllwild, CA | 16.2 | 55 | 89 | |
Top 5 Closest Detected
| Date | Time | Ratio | Event | Depth Km | Dist Mi | Dist Km | Images |
|---|---|---|---|---|---|---|---|
| 08-01-2026 | 16:16:26 | M 1.3 - 10 km E of Yorba Linda, CA | 10.3 | 4.3 | 6.9 | |
|
| 08-07-2026 | 02:31:46 | 14.34 | M 1.5 - 5 km SE of Ontario, CA | 5.5 | 7.8 | 12.5 | |
| 08-09-2026 | 04:44:36 | M 1.7 - 5 km WSW of Devore, CA | 10.3 | 22 | 36 | |
|
| 08-02-2026 | 20:51:09 | M 2.5 - 3 km N of Gardena, CA | 11.2 | 35 | 57 | |
|
| 08-02-2026 | 03:45:39 | M 2.1 - 8 km WNW of Camp Pendleton South, CA | 16.0 | 50 | 81 | |