EveryQuake

Earthquakes in Olongapo

246 earthquakes catalogued in and around Olongapo between 1919 and 2025. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
No records in the last 30 days.
246
recorded earthquakes
M7.7
largest
1919–2025
record span
4.66
mean magnitude
10
epicentre inside the border

By year

Stacked by magnitude; one column per year.

026521919: 1 (M5+)19191927: 1 (M5+)19271928: 1 (M5+)1932: 1 (M5+)1933: 2 (M5+)1934: 2 (M5+)19351937: 1 (M5+)1941: 1 (M5+)194319511956: 1 (M5+)195919671968: 2 (M5+)1969: 1 (M5+)1970: 2 (M4–5)1970: 1 (M5+)1971: 1 (M5+)1973: 1 (M4–5)1973: 1 (M5+)19751976: 1 (M4–5)1976: 1 (M5+)1977: 2 (M5+)1978: 1 (M4–5)1978: 1 (M5+)1981: 2 (M4–5)1981: 1 (M5+)1982: 1 (M4–5)1982: 2 (M5+)1983: 2 (M5+)19831984: 1 (M4–5)1985: 1 (M5+)1986: 1 (M5+)1987: 1 (M4–5)1988: 3 (M4–5)1988: 2 (M5+)1990: 3 (M4–5)1990: 1 (M5+)1991: 42 (M4–5)1991: 10 (M5+)19911992: 4 (M4–5)1993: 5 (M4–5)1993: 1 (M5+)1995: 2 (M4–5)1996: 1 (M3–4)1996: 2 (M4–5)1996: 1 (M5+)1997: 1 (M3–4)1997: 1 (M4–5)1997: 2 (M5+)1998: 3 (M4–5)1998: 2 (M5+)1999: 2 (M5+)19992000: 2 (M4–5)2001: 4 (M4–5)2002: 3 (M4–5)2003: 1 (M<3)2003: 1 (M3–4)2003: 2 (M4–5)2004: 1 (M3–4)2004: 3 (M4–5)2005: 1 (M4–5)2006: 6 (M4–5)2007: 1 (M3–4)2007: 2 (M4–5)20072008: 4 (M4–5)2008: 2 (M5+)2009: 3 (M4–5)2009: 1 (M5+)2010: 6 (M4–5)2010: 1 (M5+)2011: 1 (M3–4)2011: 2 (M4–5)2011: 1 (M5+)2012: 1 (M5+)2013: 3 (M4–5)2014: 8 (M4–5)2015: 12 (M4–5)2015: 1 (M5+)20152016: 15 (M4–5)2017: 3 (M4–5)2017: 2 (M5+)2018: 1 (M4–5)2018: 1 (M5+)2019: 3 (M4–5)2019: 1 (M5+)2020: 1 (M3–4)2020: 5 (M4–5)2021: 2 (M3–4)2021: 1 (M4–5)2022: 1 (M5+)2023: 1 (M3–4)2023: 1 (M5+)20232024: 2 (M3–4)2024: 2 (M4–5)2025: 1 (M3–4)2025: 3 (M4–5)2025: 1 (M5+)
M<3M3–4M4–5M5+

Read this chart carefully. Rising columns do not mean earthquakes are becoming more frequent. The monitoring network improved over time: the smallest detectable earthquake in Türkiye was about M5.0 in 1966 and is M1.5 today. Earlier years look quiet because small events were not heard, not because they did not happen.

Largest earthquakes

Inclusion rule: the radius widens with magnitude (15 km up to M4, 150 km at M7 and above). This is not a measure of felt shaking or intensity.

MagnitudeDateDepthDistance
7.716.07.1990 07:2623.9 km129 km
7.320.08.1937 11:5915 km149 km
7.211.12.1999 18:0352.1 km124 km
6.823.04.1985 16:15185.3 km70 km
6.721.03.1919 01:0235 km68 km
6.503.03.1933 02:19120 km79 km
6.311.08.2017 05:28185.6 km107 km
6.206.06.1933 02:2835 km103 km
6.226.11.1934 12:0935 km103 km
6.121.05.1977 05:35196.7 km103 km
6.113.02.1976 10:3328.4 km98 km
6.122.04.2019 09:1121.9 km16 km
6.018.07.1932 05:02100 km103 km
6.030.07.1996 17:3848.3 km50 km
6.023.08.1998 05:3665 km37 km

Latest earthquakes

MagnitudeDateDepthDistance
5.211.10.2025 09:32125.5 km45 km
4.511.09.2025 06:0976.6 km39 km
3.225.07.2025 14:3813 km29 km
4.410.07.2025 01:3210 km21 km
4.318.04.2025 23:3379.8 km28 km
3.511.11.2024 15:25140 km7 km
4.615.10.2024 10:5469.8 km30 km
4.605.05.2024 19:0837.9 km42 km
3.505.05.2024 18:2953 km29 km
5.116.02.2023 10:3349.3 km64 km
3.029.01.2023 17:45101 km17 km
5.014.07.2022 22:4115 km66 km
4.014.10.2021 06:45114.3 km24 km
4.026.09.2021 21:0435 km7 km
3.014.04.2021 13:4825 km29 km
4.326.09.2020 03:2610 km26 km
4.312.08.2020 02:479 km10 km
3.211.08.2020 02:336 km8 km
4.411.08.2020 02:3110 km10 km
4.808.07.2020 00:28100.5 km32 km
4.519.03.2020 06:4972.5 km30 km
4.228.11.2019 23:3610 km13 km
6.122.04.2019 09:1121.9 km16 km
4.021.04.2019 06:190 km31 km
4.823.02.2019 04:1472.2 km23 km
4.203.07.2018 22:10100 km38 km
5.517.06.2018 09:4633.1 km65 km
6.311.08.2017 05:28185.6 km107 km
4.130.07.2017 10:331 km37 km
4.024.07.2017 12:4132 km43 km
4.006.06.2017 16:1433 km15 km
5.425.05.2017 14:2795.6 km18 km
4.108.12.2016 18:4532 km35 km
4.113.11.2016 17:3015 km33 km
4.420.10.2016 19:1826 km35 km
4.418.03.2016 05:1131 km36 km
4.214.03.2016 21:0770 km39 km
4.110.03.2016 23:2829 km37 km
4.110.03.2016 12:0829 km40 km
4.309.03.2016 23:5829 km43 km
4.009.03.2016 15:4848 km35 km
4.108.03.2016 22:4518 km37 km
4.201.03.2016 18:0031 km35 km
4.028.02.2016 08:1231 km34 km
4.120.02.2016 15:5521 km34 km
4.119.02.2016 20:1629 km39 km
4.402.02.2016 22:2617 km45 km
4.218.12.2015 01:0931 km23 km
4.115.12.2015 00:1243 km30 km
4.313.11.2015 00:5628 km38 km
4.224.08.2015 11:59108 km28 km
4.326.07.2015 09:4755 km13 km
4.412.07.2015 13:0029 km39 km
4.107.05.2015 08:1835 km45 km
4.220.02.2015 21:1224 km12 km
4.313.01.2015 09:4349 km34 km
4.011.01.2015 10:1228 km37 km
4.011.01.2015 07:1327 km35 km
4.010.01.2015 21:0827 km40 km
5.910.01.2015 19:3278.4 km23 km

Method and sources

What this page counts
An earthquake appears here when its epicentre is within a magnitude-dependent distance of this place's border: 15 km up to M4, 30 km to M5, 60 km to M6, 100 km to M7, and 150 km at M7 and above. The rule exists because a large earthquake concerns neighbouring provinces too — the 17 August 1999 epicentre was in the Gulf of İzmit, on no province's land at all.
Location precision
Epicentre uncertainty is typically 1–10 km, and larger for older records. That is why this site breaks data down to districts but not to neighbourhoods or villages — the data does not support that distinction.
Magnitude scales
The catalogues use more than twelve magnitude scales (Mw, ML, mb, Md…) and they are not equivalent. Values are shown on the scale the source reported; they are not converted.
Deduplication
The same earthquake is published by several catalogues. Records within 20 seconds and 100 km whose magnitudes differ by no more than 1.2 are treated as one event; the primary record is chosen by catalogue priority.
Updates
Recent earthquakes are fetched from four sources every five minutes. The historical archive is rebuilt infrequently.
Sources
USGS ComCat · ISC Bulletin · AFAD · Kandilli / KOERI · EMSC/CSEM
Reporting an error
If you spot a wrong record, write to us; we verify against the source and correct it.