Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 16-04-2021 and time 15:50:50 (Italy) in region Adriatico Centrale (MARE)

A magnitude ML 2.4 earthquake occured in region: Adriatico Centrale (MARE), on

  • 16-04-2021 13:50:50 (UTC)
  • 16-04-2021 15:50:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6820, 16.1760 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 2.4 2021-04-16
13:50:50		 42.6817 16.1757 10 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89516181
Reviewed
Rev100 		ML 2.4 2021-04-16
13:50:50		 42.6742 16.2437 32 2021-04-16
14:19:59		 Sala Sismica INGV-Roma 89148431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-16 13:50:50 ± 0.44
Latitude 42.6817 ± 0.0153
Longitude 16.1757 ± 0.0318
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89516181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2823
Semi-minor axis of confidence ellipse (meter) 1298
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 2820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 318
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.74374
Epicentral distance of station farthest from the epicenter (degree) 1.11246
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 89148431
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-16 14:19:59

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 89516181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-14 14:38:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.OT05.EHZ. 2021-04-16T13:51:25.10 0.6 undecidable manual S 203 122.7882 50 -0.83 41
IV.APRC.HHZ. 2021-04-16T13:51:23.85 0.6 undecidable manual S 207 114.8961 50 0.02 53
IV.MSAG.HHZ. 2021-04-16T13:51:22.16 1.0 undecidable manual S 192 109.8123 50 -0.29 25
IV.SGRT.HHZ. 2021-04-16T13:51:21.88 1.0 undecidable manual S 199 108.8133 50 -0.31 25
OT.OT14.EHZ. 2021-04-16T13:51:17.30 0.6 undecidable manual S 194 89.8434 50 0.18 54
OT.OT13.EHZ. 2021-04-16T13:51:17.27 0.6 undecidable manual S 180 88.8444 50 0.41 52
IV.TREM.HHE. 2021-04-16T13:51:15.46 0.3 undecidable manual S 222 82.5507 50 0.28 81
OT.OT07.EHE. 2021-04-16T13:51:11.12 0.3 undecidable manual P 198 123.4875 50 0.1 77
IV.APRC.HHZ. 2021-04-16T13:51:10.56 0.3 undecidable manual P 207 114.8961 50 0.85 63
OT.OT05.EHZ. 2021-04-16T13:51:10.60 0.3 undecidable manual P 203 122.7882 50 -0.32 74
OT.OT03.EHE. 2021-04-16T13:51:10.15 0.3 undecidable manual P 202 115.8951 50 0.29 75
OT.OT04.EHE. 2021-04-16T13:51:09.31 0.3 undecidable manual P 205 117.3936 50 -0.78 64
IV.MSAG.HHZ. 2021-04-16T13:51:08.54 0.1 undecidable manual P 192 109.8123 50 -0.37 100
IV.SGRT.HHZ. 2021-04-16T13:51:08.67 0.3 undecidable manual P 199 108.8133 50 -0.09 80
OT.OT13.EHZ. 2021-04-16T13:51:06.00 0.6 undecidable manual P 180 88.8444 50 0.31 53
OT.OT14.EHZ. 2021-04-16T13:51:06.14 0.6 undecidable manual P 194 89.8434 50 0.3 53
IV.TREM.HHE. 2021-04-16T13:51:04.72 1.0 undecidable manual P 222 82.5507 50 0 29
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGRT.HHN. ML:2.4 0.00021119505 0.6016 AML other m 2021-04-16T13:51:23.69
IV.SGRT.HHE. ML:2.4 0.000212784 0.2176 AML other m 2021-04-16T13:51:23.95
IV.APRC.HHE. ML:2.7 0.00041971145 0.4224 AML other m 2021-04-16T13:51:25.06
IV.APRC.HNE. ML:2.8 0.00045810965000000006 0.4096 AML other m 2021-04-16T13:51:25.07
IV.MSAG.HNE. ML:2.2 0.00013737385 0.2432 AML other m 2021-04-16T13:51:25.05
IV.MSAG.HHE. ML:1.8 0.0000543 0.24 AML other m 2021-04-16T13:51:25.17
IV.APRC.HHN. ML:2.7 0.00042449999999999996 0.36 AML other m 2021-04-16T13:51:25.95
OT.OT05.EHE. ML:2.3 0.0001437389 0.4992 AML other m 2021-04-16T13:51:26.20
OT.OT05.EHN. ML:2.4 0.00016409075 0.4608 AML other m 2021-04-16T13:51:26.29
IV.MSAG.HHN. ML:2.2 0.0001225 0.26 AML other m 2021-04-16T13:51:28.95
IV.MSAG.HNN. ML:2.5 0.00029464315000000003 0.256 AML other m 2021-04-16T13:51:28.95
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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