duration of event

[xabierr]

Hi there,

Is there any way to define the duration of an event over a threshold? For example, 24 hours consecutively above a threshold value?

[georgebv]

Can you please explain in more detail how this would work? Are you looking for periods of at least 24 hours where all observations exceed the threshold? If so, could this be a pre-processing step? To me this sounds like removal of outliers or denoising.

I know this doesn't quite fit what you ask, but pyextremes has declustering parameter r when extracting POT extremes https://georgebv.github.io/pyextremes/user-guide/4-peaks-over-threshold/#declustering. This is based on the IID (independent and identically distributed) requirement of extremes when fitting a model - extreme values within a cluster are likely dependent.

[xabierr]

I need to count how many storms in a time series. A storm is defined as an event lasting at least 24 hours over a threshold of 3.

[georgebv]

How would this work in this scenario: you have 23 hours of water level above 3, then it dips below 3 for 1 hour, then it's above 3 for another 10 hours. Would you discard this event?

[xabierr]

Yes Sent on the go with Vodafone Get Outlook for Android<https://aka.ms/AAb9ysg>

…

________________________________ From: George Bocharov ***@***.***> Sent: Monday, June 12, 2023 4:44:47 PM To: georgebv/pyextremes ***@***.***> Cc: Javier Leon ***@***.***>; Author ***@***.***> Subject: Re: [georgebv/pyextremes] duration of event (Discussion #63) How would this work in this scenario: you have 23 hours of water level above 3, then it dips below 3 for 1 hour, then it's above 3 for another 10 hours. Would you discard this event? — Reply to this email directly, view it on GitHub<#63 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AJJ2W5MXVOC4DCPHRN3TUETXK23F7ANCNFSM6AAAAAAZCSJ6TI>. You are receiving this because you authored the thread.Message ID: ***@***.***>