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Event status: disregarded [?]

Reported seismic-like event (likely no quake): 6.6 km southwest of Balwyn North, Boroondara, Victoria, Australia, Monday, Mar 20, 2023 at 1:24 am (GMT +11) -

19 Mar 14:26 UTC: First to report: VolcanoDiscovery after 2 minutes.

Earthquake details

Date & time	Mar 19, 2023 14:24:35 UTC -
Local time at epicenter	Monday, Mar 20, 2023 at 1:24 am (GMT +11)
Status	disregarded
Magnitude	unknown (3?)
Depth	10.0 km
Epicenter latitude / longitude	37.8228°S / 145.03052°E
Antipode	37.823°N / 34.969°W
Shaking intensity	Very weak shaking
Felt	2 reports
Primary data source	VolcanoDiscovery (User-reported shaking)
Nearest volcano	Newer Volcanics Province (222 km / 138 mi)
Nearby towns and cities	6 km (4 mi) E of Melbourne (pop: 4,246,400) \| Show on map \| Quakes nearby 7 km (4 mi) WSW of Balwyn North (Boroondara City) (pop: 20,000) \| Show on map \| Quakes nearby 8 km (5 mi) WNW of Burwood (pop: 14,900) \| Show on map \| Quakes nearby 13 km (8 mi) SSE of Fawkner (pop: 14,000) \| Show on map \| Quakes nearby 22 km (14 mi) ESE of St. Albans (pop: 37,600) \| Show on map \| Quakes nearby 43 km (27 mi) SSW of Kinglake Central (pop: 335) \| Show on map \| Quakes nearby 45 km (28 mi) S of Wallan (pop: 11,000) \| Show on map \| Quakes nearby 462 km (287 mi) SW of Camberra (Australian Capital Territory) (pop: 367,800) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Overcast Clouds 14.8°C (59 F), humidity: 76%, wind: 4 m/s (7 kts) from S
Estimated seismic energy released	2 x 10⁹ joules (554 kilowatt hours, equivalent to 0.477 tons of TNT) \| about seismic energy

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Seismograms

Seismic station: Scienceworks Melbourne (MLBS/AU network) | Distance from quake: 12 km / 7 mi | Show on map | Station Info

Seismic station Scienceworks Melbourne: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.5-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Scienceworks Melbourne: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Scienceworks Melbourne: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Toolangi, VIC (TOO/AU network) | Distance from quake: 49 km / 31 mi | Show on map | Station Info

Seismic station Toolangi, VIC: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Toolangi, VIC: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Toolangi, VIC: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Mt Clear College/Earth Ed (AUMTC/S1 network) | Distance from quake: 104 km / 65 mi | Show on map | Station Info

Seismic station Mt Clear College/Earth Ed: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Mt Clear College/Earth Ed: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Mt Clear College/Earth Ed: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Mt Arapiles, VIC (ARPS/AU network) | Distance from quake: 306 km / 190 mi | Show on map | Station Info

Seismic station Mt Arapiles, VIC: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Mt Arapiles, VIC: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Mt Arapiles, VIC: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Canberra, Kowen Forest (CNB/AU network) | Distance from quake: 477 km / 296 mi | Show on map | Station Info

Seismic station Canberra, Kowen Forest: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Canberra, Kowen Forest: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Canberra, Kowen Forest: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake (3)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

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Greensborough / not felt / 1-2 s : I heard a rumbling sound similar to a trcuk, but live some distance from anywhere that would be suitable for a truck. Was very low frequency, and hard to describe. It wasn't like a truck or aircraft as I have experience with those.

Melbourne, Victoria (0 km SW of epicenter) [Map] / Weak shaking (MMI III) : Felt bed shaking

Box hill / Weak shaking (MMI III)

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