Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 31-05-2021 and time 02:34:27 (Italy) in region Adriatico Centrale (MARE)

A magnitude ML 2.2 earthquake occured in region: Adriatico Centrale (MARE), on

  • 31-05-2021 00:34:27 (UTC)
  • 31-05-2021 02:34:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6050, 16.2090 at 12 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 2.2 2021-05-31
00:34:27		 42.6047 16.2087 12 2021-12-29
11:12:04		 Bollettino Sismico Italiano INGV 91273341
Reviewed
Rev100 		ML 2.2 2021-05-31
00:34:27		 42.5947 16.0483 10 2021-05-31
00:44:40		 Sala Sismica INGV-Roma 90642941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-31 00:34:27 ± 0.16
Latitude 42.6047 ± 0.0072
Longitude 16.2087 ± 0.0147
Depth (km) 12 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91273341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1310
Semi-minor axis of confidence ellipse (meter) 700
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 1310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 184
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.70597
Epicentral distance of station farthest from the epicenter (degree) 1.83642
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 91273341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-14 09:23:04

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 90642941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-31 00:44:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.INTR.HHE. 2021-05-31T00:34:59.49 0.3 undecidable manual P 252 200.1441 54 0.79 54
OT.OT12.EHZ. 2021-05-31T00:34:59.00 0.6 undecidable manual S 193 110.7003 90 -0.24 59
IV.CAFE.HHN. 2021-05-31T00:34:59.04 0.6 undecidable manual P 205 192.4629 54 1.29 30
OT.OT04.EHZ. 2021-05-31T00:34:59.40 0.6 undecidable manual S 208 110.9001 90 0.1 63
IV.APRC.HHZ. 2021-05-31T00:34:58.70 0.6 undecidable manual S 210 108.7134 90 -0.02 63
OT.OT03.EHZ. 2021-05-31T00:34:58.80 0.3 undecidable manual S 205 109.113 90 -0.02 94
IV.AMUR.HHN. 2021-05-31T00:34:57.45 0.6 undecidable manual P 170 191.1642 54 -0.13 46
IV.SNAL.HNE. 2021-05-31T00:34:57.92 1.0 undecidable manual P 204 203.8404 54 -1.24 14
IV.MSAG.HHZ. 2021-05-31T00:34:57.30 0.6 undecidable manual S 194 102.0201 90 0.38 61
IV.LPEL.HHE. 2021-05-31T00:34:56.35 0.6 undecidable manual P 250 177.2892 54 0.5 46
IV.SGTA.HNZ. 2021-05-31T00:34:56.85 0.3 undecidable manual P 203 177.2892 54 0.99 57
IV.SGRT.HHZ. 2021-05-31T00:34:56.70 0.3 undecidable manual S 202 101.7204 90 -0.15 93
OT.OT15.EHZ. 2021-05-31T00:34:56.90 0.6 undecidable manual P 161 174.8916 54 1.33 33
IV.TRIV.HHN. 2021-05-31T00:34:54.35 0.6 undecidable manual P 236 165.0126 90 0.27 51
IV.TST02.HHE. 2021-05-31T00:34:54.10 1.0 undecidable manual P 246 166.3113 90 -0.17 26
IV.MOCO.HNE. 2021-05-31T00:34:54.49 0.3 undecidable manual P 213 162.0156 90 0.86 65
IV.MRVN.HHZ. 2021-05-31T00:34:53.48 0.6 undecidable manual P 180 171.2952 90 -1.56 27
OT.OT14.EHZ. 2021-05-31T00:34:52.30 0.6 undecidable manual S 198 82.3509 91 0.63 59
CR.STON.BHE. 2021-05-31T00:34:51.10 0.6 undecidable manual P 76 124.986 90 3.19 3
IV.CIGN.HHZ. 2021-05-31T00:34:51.75 0.6 undecidable manual P 226 150.4383 90 -0.08 58
OT.OT13.EHZ. 2021-05-31T00:34:51.70 0.3 undecidable manual S 182 80.364 91 0.56 92
IV.MELA.HNZ. 2021-05-31T00:34:49.26 0.3 undecidable manual P 222 133.5663 90 0.02 90
OT.OT07.EHZ. 2021-05-31T00:34:46.09 0.3 undecidable manual P 200 116.2947 90 -0.48 85
OT.OT12.EHZ. 2021-05-31T00:34:45.40 0.6 undecidable manual P 193 110.7003 90 -0.31 59
OT.OT06.EHZ. 2021-05-31T00:34:45.63 0.3 undecidable manual P 207 113.7972 90 -0.56 83
OT.OT04.EHZ. 2021-05-31T00:34:45.10 0.3 undecidable manual P 208 110.9001 90 -0.65 80
OT.OT03.EHZ. 2021-05-31T00:34:44.97 0.3 undecidable manual P 205 109.113 90 -0.5 85
IV.APRC.HHZ. 2021-05-31T00:34:44.79 0.3 undecidable manual P 210 108.7134 90 -0.62 82
IV.SGRT.HHZ. 2021-05-31T00:34:43.89 0.3 undecidable manual P 202 101.7204 90 -0.44 88
IV.MSAG.HHZ. 2021-05-31T00:34:43.94 0.3 undecidable manual P 194 102.0201 90 -0.43 88
IV.TREM.HNZ. 2021-05-31T00:34:41.22 0.6 undecidable manual P 227 78.366 91 0.5 61
OT.OT13.EHZ. 2021-05-31T00:34:41.14 0.3 undecidable manual P 182 80.364 91 0.11 100
OT.OT14.EHZ. 2021-05-31T00:34:41.01 0.3 undecidable manual P 198 82.3509 91 -0.33 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT13.EHE. ML:2.5 0.000406 0.38 AML other m 2021-05-31T00:34:54.77
OT.OT13.EHN. ML:2.6 0.000517 0.3 AML other m 2021-05-31T00:34:56.95
IV.SGRT.HHN. ML:2.2 0.0001615 0.36 AML other m 2021-05-31T00:34:58.45
IV.MSAG.HNN. ML:2.3 0.00018252185 0.2 AML other m 2021-05-31T00:34:59.70
IV.APRC.HNE. ML:2.5 0.000249701 0.3 AML other m 2021-05-31T00:35:00.48
IV.SGRT.HHE. ML:2.2 0.0001565 0.58 AML other m 2021-05-31T00:35:00.65
IV.APRC.HHN. ML:2.4 0.00022700000000000002 0.46 AML other m 2021-05-31T00:35:01.58
IV.APRC.HHE. ML:2.5 0.00026649999999999997 1.42 AML other m 2021-05-31T00:35:01.10
IV.MSAG.HHN. ML:2.0 0.00008560000000000001 1.54 AML other m 2021-05-31T00:35:01.83
IV.MSAG.HNE. ML:2.2 0.00013744695000000002 0.32 AML other m 2021-05-31T00:35:02.30
IV.MSAG.HHE. ML:1.8 0.00005935 1.32 AML other m 2021-05-31T00:35:02.30
OT.OT12.EHE. ML:2.0 0.00009114999999999999 0.82 AML other m 2021-05-31T00:35:03.31
OT.OT12.EHN. ML:2.0 0.0000864 0.52 AML other m 2021-05-31T00:35:03.61
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download