![Dihewyd gan Lleucu Ifans](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Dihewyd%20Lleucu%20Ifans.jpg?itok=QFydcDwP)
Lluniau: Goleuadau’r gogledd i’w gweld yn glir o Gymru
Mae goleuadau’r gogledd wedi bod yn weladwy o ogledd i dde Cymru wrth i un o'r stormydd geomagnetig cryfaf daro’r ddaear mewn dau ddegawd brynhawn Gwener.
Mae stormydd geomagnetig yn digwydd pan fydd yr haul yn rhyddhau gronynnau wedi'u gwefru tuag at y Ddaear.
Wrth iddyn nhw gyrraedd magnetosffer y ddaear maen nhw’n weladwy ar ffurf llenni o oleuni.
Roedd cyfuniad o storm o’r fath ac awyr clir yn golygu bod goleuadau’r gogledd, neu’r aurora borealis, yn weladwy llawer pellach i’r de ar draws Ewrop na sydd yn arferol.
Mae Gweinyddiaeth Genedlaethol Cefnforol ac Atmosfferig yr Unol Daleithiau (NOAA) wedi cyhoeddi rhybudd am storm solar.
Fe allai stormydd ar y raddfa hon o bosibl effeithio ar loerennau a’r grid pŵer, medden nhw.
Dywedodd y Swyddfa Dywydd fod disgwyl i oleuni'r gogledd barhau yn weladwy, ond ar raddfa lai, nos Sadwrn hefyd.
Dyma rai o luniau ein darllenwyr o’r goleuadau.
![Dihewyd gan Lleucu Ifans](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Dihewyd%20Lleucu%20Ifans.jpg?itok=QFydcDwP)
![Machynlleth gan Carys Morris](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Machynlleth%20Carys%20Morris.jpg?itok=058DDthW)
![Penegoes gan Eirian Davies](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Penegoes%20Eirian%20Davies.jpg?itok=Supot0FJ)
![Bethesda Bach Catherine Young](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Bethesda%20Bach%20Catherine%20Young.jpg?itok=y6h_GAYW)
![Y Ferwig yng Ngheredigion gan Bethan Cadwaladr-Lewis](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Ferwig%20Ceredigion.jpg?itok=k-_1u-eN)
![Morfa Nefyn gan Marina Parry Owen](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Morfa%20Nefyn%20Marina%20Parry%20Owen.jpg?itok=QsfsU7JI)
![Eglwys Gadeiriol Dewi Sant](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/St%20Davids%20Cathedral.jpeg?itok=qNVbyyvz)
![Dwyran Mon Lowri Owen](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Dwyran%20Mon%20Lowri%20Owen.jpg?itok=xSKkIyOK)
![Aberdaron Liz Jones](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Aberdaron%20Liz%20Jones.jpg?itok=4HDD2M4O)
![Gallt y Foel Deiniolen](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Gally%20y%20Foel%20Deiniolen.jpg?itok=9z2Jclxq)
![Croes-lan, Llandysul](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/croeslan.jpg?itok=7kZaUc1k)
![Porthdinllaen gan Caryl Jones](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Porthdinllaen%20Caryl%20Jones.jpg?itok=vU9t-I3N)
![Llanberis gan Carys Chiv Williams](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Llanberis%20Carys%20Chiv%20Williams.jpg?itok=Ruv9PKYU)
![Castell Dolbadarn Llanberis gan Glyn Hughes](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Castell%20Dolbadarn%20Llanberis%20gan%20Glyn%20Hughes.jpg?itok=bLNcCgA1)
![Lerpwl gan Peter Byrne / PA](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Lerpwl%20Peter%20Byrne%202.jpg?itok=S2-D4IuB)
![Lerpwl gan Peter Byrne / PA](https://ncms.s4c.org.uk/sites/default/files/styles/newyddion_large_square_1000x1000_/public/2024-05/Lerpwl%20Peter%20Byrne.jpg?itok=rPQe80s6)