ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
Alerts, Forecasting, and Notifications
Volcano Updates
Volcano observatories issue updates and other types of notifications as activity warrants.
Earthquake Notification Service
Receive automated notification emails when earthquakes happen in your area.
Time is critical in a disaster. Every second matters. Knowing where hazards are and being able to alert people before they occur can save lives. The USGS has numerous systems in place to notify people of risk or impending dangerous conditions associated with natural hazards.
Living in Harm's Way
Theoretically, disasters could be avoided if people didn’t live in hazardous areas. However, realistically, that is impossible. Because no matter where people live, some form of natural hazard will likely threaten them at some point. Whether it is an earthquake, wildfire, flood, hurricane, eruption, or something else, Earth tends to throw people into harm’s way regardless of what we do. So, the best we can do is be prepared, and with the help of some innovative technologies, possibly get alerted of an impending threat.
Learn how USGS works with partners, emergency planners, and managers to provide hazard data alerts, forecasts, and monitoring and notification systems. From earthquakes to harmful algal blooms, USGS scientists are on the cutting edge in understanding when, where, and what we need to do to avoid loss.
Alerts
From wildfires to flooding to earthquake early warnings, USGS helps provide warnings in time to get ready and get out of harm’s way. You and your family can subscribe to many of them.
WaterAlert
ShakeAlert® Earthquake Early Warning
Alaska Harmful Algal Bloom Network
Volcano Updates
Notifications
In addition to monitoring, USGS actively works to notify people about possible threats. By raising awareness people can plan, act, and avoid threats from natural hazards. A few extra seconds can afford people time to act, whether this is evacuating or dropping, covering, and holding on.
Earthquakes Notification Service
Volcano Notification Service
WaterNow
Forecasting
In other cases, community alerts, forecasting, and drills give people critical time to prepare or avoid the disaster.
Postfire Debris Flows
Aftershock Forecast
Fire Danger Forecast
Forecasting Coastal Change
Informational Services
The USGS brings a range of expertise to observing potential threats in our Nation’s land, air, and water. Here are a few examples of real-time data we distribute free of charge.
Latest Earthquakes
Wildfire Conditions
National Water Dashboard
Current Volcano Activity
Citizen Science Observations
Citizen science allows you to contribute to science no matter where you are. Whether by asking questions, reporting observations, or collecting data, you and other members of the public can use your talents to help advance scientific knowledge.
Did You Feel It?
Report Volcanic Ash - Alaska
Report Nonindigenous Aquatic Species
WHISPers Wildlife Disease Reporting
Publications
How USGS gages are used in flood forecasting
Considerations for creating equitable and inclusive communication campaigns associated with ShakeAlert, the earthquake early warning system for the West Coast of the USA
ShakeAlert—An earthquake early warning system for the United States west coast
Impact-based earthquake alerts with the U.S. Geological Survey's PAGER system: what's next?
The USGS Earthquake Notification Service (ENS): Customizable notifications of earthquakes around the globe
Science
Earthquake Early Warning - Overview
Earthquake Early Warning – Fine-Tuning for Best Alerts
The Nonindigenous Aquatic Species Alert Risk Mapper (ARM)
ShakeAlert
National Alert Risk Mapper for Nonindigenous Aquatic Species
Multimedia
ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).

Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
ShakeAlert Drop-Cover-Hold On Badge
ShakeAlert Drop-Cover-Hold On Badge
News
A long-suspected culprit is caught
Post-Wildfire Debris Flow Awareness
USGS ShakeAlert Earthquake Early Warning System
How USGS gages are used in flood forecasting
Considerations for creating equitable and inclusive communication campaigns associated with ShakeAlert, the earthquake early warning system for the West Coast of the USA
ShakeAlert—An earthquake early warning system for the United States west coast
Impact-based earthquake alerts with the U.S. Geological Survey's PAGER system: what's next?
The USGS Earthquake Notification Service (ENS): Customizable notifications of earthquakes around the globe
System designed for issuing landslide alerts in the San Francisco Bay area
Earthquake Early Warning - Overview
Earthquake Early Warning – Fine-Tuning for Best Alerts
The Nonindigenous Aquatic Species Alert Risk Mapper (ARM)
ShakeAlert
National Alert Risk Mapper for Nonindigenous Aquatic Species
Volcano Notification Service (VNS)
Assessing Seasonal Wildfire Forecasting Methods in Alaska
Operational Earthquake Forecasting – Implementing a Real-Time System for California
USGS offers a wide variety of alerts and notifications to keep us all aware and safe from hazardous situations.
WaterAlert
Volcano Notification Service (VNS)
Earthquake Notifications, Feeds, and Web Services
Did You Feel It?
Search Earthquake Catalog
U.S. Geological Survey COVID-19 Wastewater Surveillance
National Water Dashboard (NWD)
Coastal Change Hazards Portal
ShakeAlert Infographic: Detect, Deliver, Protect
A ShakeAlert Message is an early warning from a network system that detects significant earthquakes quickly enough so that alerts can be delivered to people and automated systems potentially seconds before shaking arrives. ShakeAlert Messages are a product of the Advanced National Seismic System (ANSS). ShakeAlert can protect people and infrastructure by triggering automatic actions like slowing...
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).

Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
ShakeAlert Drop-Cover-Hold On Badge
ShakeAlert Drop-Cover-Hold On Badge
Why is it important to monitor volcanoes?
How can I obtain river forecasts (flood forecasts)?
Why is elevation data so important to forecasting hurricane impact?
What is the difference between earthquake early warning, earthquake forecasts, earthquake probabilities, and earthquake prediction?
Can the National Seismic Hazard Maps be used as an earthquake forecast tool for the near future?
How are floods predicted?
Can you predict earthquakes?
Can animals predict earthquakes?
How do I sign up for the ShakeAlert® Earthquake Early Warning System?
Is there a way to get alerts about streamflow conditions?
Can I get on a list to receive an email message when there is an earthquake? How do I sign up for earthquake notifications? Are there any Feeds I can subscribe to?
How quickly is earthquake information posted to the USGS website and sent out via the Earthquake Notification Service (ENS) and other feeds?
Time is critical in a disaster. Every second matters. Knowing where hazards are and being able to alert people before they occur can save lives. The USGS has numerous systems in place to notify people of risk or impending dangerous conditions associated with natural hazards.
Living in Harm's Way
Theoretically, disasters could be avoided if people didn’t live in hazardous areas. However, realistically, that is impossible. Because no matter where people live, some form of natural hazard will likely threaten them at some point. Whether it is an earthquake, wildfire, flood, hurricane, eruption, or something else, Earth tends to throw people into harm’s way regardless of what we do. So, the best we can do is be prepared, and with the help of some innovative technologies, possibly get alerted of an impending threat.
Learn how USGS works with partners, emergency planners, and managers to provide hazard data alerts, forecasts, and monitoring and notification systems. From earthquakes to harmful algal blooms, USGS scientists are on the cutting edge in understanding when, where, and what we need to do to avoid loss.
Alerts
From wildfires to flooding to earthquake early warnings, USGS helps provide warnings in time to get ready and get out of harm’s way. You and your family can subscribe to many of them.
WaterAlert
ShakeAlert® Earthquake Early Warning
Alaska Harmful Algal Bloom Network
Volcano Updates
Notifications
In addition to monitoring, USGS actively works to notify people about possible threats. By raising awareness people can plan, act, and avoid threats from natural hazards. A few extra seconds can afford people time to act, whether this is evacuating or dropping, covering, and holding on.
Earthquakes Notification Service
Volcano Notification Service
WaterNow
Forecasting
In other cases, community alerts, forecasting, and drills give people critical time to prepare or avoid the disaster.
Postfire Debris Flows
Aftershock Forecast
Fire Danger Forecast
Forecasting Coastal Change
Informational Services
The USGS brings a range of expertise to observing potential threats in our Nation’s land, air, and water. Here are a few examples of real-time data we distribute free of charge.
Latest Earthquakes
Wildfire Conditions
National Water Dashboard
Current Volcano Activity
Citizen Science Observations
Citizen science allows you to contribute to science no matter where you are. Whether by asking questions, reporting observations, or collecting data, you and other members of the public can use your talents to help advance scientific knowledge.
Did You Feel It?
Report Volcanic Ash - Alaska
Report Nonindigenous Aquatic Species
WHISPers Wildlife Disease Reporting
Publications
How USGS gages are used in flood forecasting
Considerations for creating equitable and inclusive communication campaigns associated with ShakeAlert, the earthquake early warning system for the West Coast of the USA
ShakeAlert—An earthquake early warning system for the United States west coast
Impact-based earthquake alerts with the U.S. Geological Survey's PAGER system: what's next?
The USGS Earthquake Notification Service (ENS): Customizable notifications of earthquakes around the globe
Science
Earthquake Early Warning - Overview
Earthquake Early Warning – Fine-Tuning for Best Alerts
The Nonindigenous Aquatic Species Alert Risk Mapper (ARM)
ShakeAlert
National Alert Risk Mapper for Nonindigenous Aquatic Species
Multimedia
ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).

Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
ShakeAlert Drop-Cover-Hold On Badge
ShakeAlert Drop-Cover-Hold On Badge
News
A long-suspected culprit is caught
Post-Wildfire Debris Flow Awareness
USGS ShakeAlert Earthquake Early Warning System
How USGS gages are used in flood forecasting
Considerations for creating equitable and inclusive communication campaigns associated with ShakeAlert, the earthquake early warning system for the West Coast of the USA
ShakeAlert—An earthquake early warning system for the United States west coast
Impact-based earthquake alerts with the U.S. Geological Survey's PAGER system: what's next?
The USGS Earthquake Notification Service (ENS): Customizable notifications of earthquakes around the globe
System designed for issuing landslide alerts in the San Francisco Bay area
Earthquake Early Warning - Overview
Earthquake Early Warning – Fine-Tuning for Best Alerts
The Nonindigenous Aquatic Species Alert Risk Mapper (ARM)
ShakeAlert
National Alert Risk Mapper for Nonindigenous Aquatic Species
Volcano Notification Service (VNS)
Assessing Seasonal Wildfire Forecasting Methods in Alaska
Operational Earthquake Forecasting – Implementing a Real-Time System for California
USGS offers a wide variety of alerts and notifications to keep us all aware and safe from hazardous situations.
WaterAlert
Volcano Notification Service (VNS)
Earthquake Notifications, Feeds, and Web Services
Did You Feel It?
Search Earthquake Catalog
U.S. Geological Survey COVID-19 Wastewater Surveillance
National Water Dashboard (NWD)
Coastal Change Hazards Portal
ShakeAlert Infographic: Detect, Deliver, Protect
A ShakeAlert Message is an early warning from a network system that detects significant earthquakes quickly enough so that alerts can be delivered to people and automated systems potentially seconds before shaking arrives. ShakeAlert Messages are a product of the Advanced National Seismic System (ANSS). ShakeAlert can protect people and infrastructure by triggering automatic actions like slowing...
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
ShakeAlert 3 Basic Steps: Sensor Networks to processing center to users.
ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
ShakeAlert Is Not Earthquake Prediction. Cartoon showing that the earthquake has already started when the ShakeAlert message is distributed.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
This is an animation showing the changing conditions of USGS streamgages from October 1, 2020 to September 30, 2021. The river conditions shown range from the driest condition seen at a gage (red open circles) to the wettest (blue closed circles). A purple outer ring around a gage indicates it is flooding.
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).
Alert Delivery Thresholds used by ShakeAlert partners - The USGS issues ShakeAlert Messages but delivery of alerts will come by other public and private means (internet, radio, television, cellular), including Wireless Emergency Alerts (WEA) delivered by FEMA’s Integrated Public Alert and Warning System (IPAWS).

Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
Talk by Hannah Dietterich–Alaska Volcano Observatory geologist. Talk originally presented at the American Geophysical Union Fall Meeting 2020.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
USGS scientists are studying water-quality conditions and harmful algal blooms—known as HABs—in Owasco, Seneca and Skaneateles lakes in New York. The USGS monitoring effort will provide a better understanding of HAB growth and severity and allow for near instantaneous detection of changing water-quality conditions that might be indicative of HAB development.
ShakeAlert Drop-Cover-Hold On Badge
ShakeAlert Drop-Cover-Hold On Badge