Reviewed by USGSIndonesia22d ago
M5.2 earthquake 28 km S of Cilacap, Indonesia
Friday, September 4, 2026, 05:04:54 UTC · 7.987°S, 109.041°E
A magnitude 5.2 earthquake struck 28 km S of Cilacap, Indonesia on Friday, September 4, 2026, 05:04:54 UTC, at a depth of 10.0 km (shallow). USGS received 5 “Did You Feel It?” reports, with a maximum reported intensity of IV (light). It is the strongest earthquake within 300 km since an M5.2 on June 27, 2026.
- Magnitude
- 5.2
- Moderate · mb
- Depth
- 10 km
- Shallow
- Felt reports
- 5
- Max intensity IV
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquake
In context
How big was it, and why here?
Energy released
951 tons of TNT
That is about 1/16 of the Hiroshima bomb. It released about 2 times the energy of a magnitude 5.0.
Tectonic setting
253 km
from the nearest mapped plate boundary, between the Sunda and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
10 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
Did You Feel It?
Where it was felt
Reports sent by people to USGS, grouped by place (most reports first). Intensity uses the Modified Mercalli scale (I–X): what people felt, not the magnitude.
| Place | Intensity | Reports | Distance |
|---|---|---|---|
| Kadungora, Jawa Barat, Indonesia | IV · Light | 1 | 161 km |
| Banyumas, Jawa Tengah, Indonesia | III · Weak | 1 | 58 km |
| Purwokerto, Jawa Tengah, Indonesia | II · Weak | 1 | 66 km |
| Karawang, Jawa Barat, Indonesia | II · Weak | 1 | 269 km |
| Kebumen, Jawa Tengah, Indonesia | II · Weak | 1 | 76 km |
USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 75 km
USGS has not published any M2.5+ earthquake within 75 km since this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 466 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.7226 km SSW of Singaparna, IndonesiaJuly 17, 2006 · 229 km SW of this epicenter
- 7.6233 km S of Pundong, IndonesiaSeptember 11, 1921 · 289 km SE of this epicenter
- 7.535 km NNE of Rengasdengklok, IndonesiaAugust 8, 2007 · 297 km NW of this epicenter
- 7.487 km SSW of Srandakan, IndonesiaJuly 23, 1943 · 113 km SE of this epicenter
- 7.1138 km SSE of Pundong, IndonesiaSeptember 10, 1926 · 219 km SE of this epicenter
- 7.066 km SSW of Banjar, IndonesiaSeptember 2, 2009 · 193 km W of this epicenter
- 6.992 km S of Pundong, IndonesiaSeptember 27, 1937 · 176 km SE of this epicenter
- 6.7278 km SSW of Kawalu, IndonesiaApril 3, 2011 · 254 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 45 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 8,812 recorded deaths. The most severe:
- 2006M6.3
Java: Bantul, Yogyakarta
26 May 2006 · 155 km away
6,234 deaths$3.1 billion damage
- 2006M7.7
Java
17 Jul 2006 · 229 km away
802 deaths$55 million damagetsunami
- 1924
Java: Wonosobo
2 Dec 1924 · 122 km away · intensity IX
727 deathsSevere damage ($5–24M)
- 2022M5.6
W Java: Cianjur
21 Nov 2022 · 259 km away · intensity VIII
635 deaths$256 million damage
- 1943M8.1
Java: Jogyakarta
23 Jul 1943 · 199 km away · intensity VIII
213 deathsSevere damage ($5–24M)
- 2009M7.0
Java
2 Sep 2009 · 193 km away
81 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.