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ShakeAlertLA sends alerts to users within Los Angeles County that an earthquake of greater than magnitude 4.5 intensity has been detected and that they may soon feel shaking. The app is available for both Apple and Android devices and available in both English and Spanish. You can also use this app to prepare for an earthquake, get details on recent earthquakes, and find help after an earthquake. This app is brought to you by Mayor Eric Garcetti and the City of Los Angeles, and built on the ShakeAlert system developed by the U.S. Geological Survey.

Collaborative Partnership

The ShakeAlertLA App is brought to you by the Office of Los Angeles Mayor Eric Garcetti, the Information Technology Agency and the Department of Emergency Management. It has been made possible by support from the Annenberg Foundation and the Mayor’s Fund for Los Angeles. This App is an official pilot in partnership with the U.S. Geological Survey.

Frequently Asked Questions

When an earthquake happens, a rupturing fault sends out different types of waves. Rytmik supporter bundle download. The first wave felt is the fast-moving P-wave. The slower-moving S-waves arrive later causing the most damage. Sensors detect the P-wave and immediately transmit data to an earthquake alert center where the location and size of the quake are determined and updated as more data become available. A message from the alert center is immediately transmitted to your computer or mobile phone with data on the expected intensity and arrival time of shaking at your location. https://www.shakealert.org/

To receive notifications of earthquakes, you must have Location Services “Always On”. As a result, ShakeAlertLA keeps track of the last location of your phone to push out an alert as needed with the expected shaking at that location. When the location is updated, previous information is overwritten. No other information is collected or accessed.

Download Earth Alerts 2020.1.122 for Windows. Earth Alerts is a free monitoring application that runs on Windows-based computers. Softonic review Forecasts for catastrophists. Earth Alerts is a 'near real time' weather monitoring and information service for natural hazards. You won't find showers or sunny spells among the forecasts made by Earth Alerts - it's strictly a tsunami, earthquake and wildfire kind of kind of program. A test of the emergency alert system with a outro voice (its not good quality) by bschlipp02 Unknown people in Omaha EAS Alert by JAMden1218 Make Your Own EAS Alert remix by cdwindowsxp2001.

1. Is ShakeAlertLA predicting an earthquake?
   • No, if you receive an alert it’s because an earthquake has already started. ShakeAlertLA gets notifications from the U.S. Geological Survey’s ShakeAlert detectors. These detectors are placed in the ground along the West Coast of the United States and detect when ground shaking occurs. An alert is then sent that an earthquake has started.
2. How does this actually work?
   • When an earthquake happens, a rupturing fault sends out different types of waves. The first wave felt is the fast-moving P-wave. The slower-moving S-waves arrive later causing the most damage. Sensors detect the P-wave and immediately transmit data to an earthquake alert center where the location and size of the quake are determined and updated as more data become available. A message from the alert center is immediately transmitted to your computer or mobile phone with data on the expected intensity and arrival time of shaking at your location. https://www.shakealert.org/
3. What information is being collected from phones with ShakeAlertLA installed?
   • To receive notifications of earthquakes, you must have Location Services “Always On”. As a result, ShakeAlertLA keeps track of the last location of your phone to push out an alert as needed with the expected shaking at that location. When the location is updated, previous information is overwritten. No other information is collected or accessed.

Principle Present contributions FAQ

Principle

EMSC collects real time parametric data (source parmaters and phase pickings) provided by 70 seismological networks of the Euro-Med region. These data are provided to the EMSC either by email or via PDL (Product Distribution Layer). The collected data are automatically archived in a database, made available via an autoDRM, and displayed on the web site. The collected data are automatically merged to produce automatic locations which are sent to several seismological institutes in order to perform quick moment tensors determination.
For potentially destructive earthquakes, the EMSC operates an Earthquake Notification Service in which email/SMS/fax are disseminated to the registered end-users within 20-30 minutes on average after the earthquake occurrence. This service is free and registration is available here. The real time information services are purely automatic and deals with all events reported by the data contributors while the Earthquake Notification Service is a manual one, where the email/SMS notifications are disseminated by a seismologist on call to the end-users. The way the real time information services work is described in details in the following document:

• Report on EMSC Real Time Earthquake Information services in 2015.

Present contributions

• 70 contributing networks
• Corresponding to more than 2,500 seismic stations
• More than 40,000 events published per year

Frequently Asked Questions (for data contributors)

• Parametric data i.e. source parameters (origin time, epicenter coordinates, hypocentral depth, magnitude) and arrival times (station code, phase picking, calibrated amplitude/period).
• Groups of phases (without associated location) can be highly valuable and should be sent too.
• Moment tensors and/or focal mechanisms.
• Field observations after a significant earthquake.

• Rapidity is critical to ensure real time characteristic of the information and to allow the rapid dissemination of alert messages (alert messages are generally disseminated within 20-30 minutes of the earthquake occurrence).
• Good station coverage is critical to ensure reliable location. Then, contributions from stations close to the epicentre, and/or which significantly improve the station coverage (e.g. offshore seismicity) are extremely valuable even if only available several hours after the event occurrence.
• In practice, networks with no automatic processing capacities are invited to systematically send their data, as soon as possible. In case of significant (M > 4.0-4.5) and/or felt earthquake, their data can be essential to determine accurate source parameters.

• Via email: sent to a specific email adress.
• or Via QWIDS: the Quake Watch Information Distribution System allows quick, robust and secure data echange. Please contact for more information
• with the following recommandations:
- Data message must be sent in ascii (text) format. Not in html or enriched text.
- The data must be included in the body of the message. No .doc, no .xls.
- The data provider can use any text format but its data must then always be formatted in the same format because all the data are processed automatically. Any modification of the format must be notified to EMSC several days before.
- One message must contain the data of only one earthquake.

• Messages related to events with magnitude lower than 2 are not displayed by the Real Time System (they are however archived in the database). The selection being made automatically at EMSC, contributors should not bother on this aspect.

• The quicker the contribution, the better; nevertheless there is no time limit. In practice, except for most significant earthquakes for which a final revised location may be re-computed 2 to 3 days after the event occurrence, data contributions are more valuable if sent within 24 hours. Indeed, since May 2005, EMSC systematically reviews all Euro-Med events (as far as they are reported by 2 different networks) regardless of their magnitude, on the working day following their occurrences. This manual review has 2 objectives:
  • To avoid that inaccurate or erroneous hypocentral solutions resulting from automatic locations tools stay on the web page.
  • To define a preliminary bulletin within a few days delay which will be used as an help to compute the Euro-Med Bulletin.

• Data can be both manual and automatic
• A manual pick automatically replace the automatic one for the same station and same phase, therefore a manual message can be sent by the same network to update a manual one.

• No. Receiving data for the same station from different networks improve reliability of the system in case of technical failure of a contributor. In practice, when available a manual pick replaces the automatic one. If only automatic picks are available, the one with the smallest residual is kept in the real time system, and, for the alert system, the choice is made by the seismologist on duty.

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• Define the procedures before sending any parametric data contributions (contact ).
• Keep the same ASCII format (otherwise the parser will fail and the data won't be integrated). No attachment, no .doc, .xls, .html files.
• Systematically send the data to both and . Indeed, IGN (Spain) runs back-up procedures for EMSC and takes over the duty for the alert system in case of technical problem or maintenance activities at EMSC.
• Always send the data from the same identified email accounts (parsers are associated to email specific addresses).
• Ensure that the stations are registered in the International Registry. EMSC can help you on this matter.

• All the data EMSC receives are archived immediately in a database and available by autoDRM (in GSE2.0 format). If interested please contact
• The automatic locations (MIX, see Figure 1) are disseminated by email 65 minutes after the earthquake occurrence. The 65 minutes delay ensures the stability of the solution as the vast majority of the data are then available. Nevertheless, these solutions are purely automatic and may be erroneous. If interested please contact
• More generally, if EMSC can provide a useful specific service for its members and/or data contributors, we will be happy to help!

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• All the data which can be of interest for the seismological community and/or the public: tectonic setting, historical seismicity, field report, testimony on the effects or links to your own dedicated pages. Do not hesitate to ask us to open new pages.
• All contributions should be sent to , and .