Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 31-05-2021 and time 02:56:10 (Italy) in region Costa Calabra nord occidentale (Cosenza)

A magnitude ML 1.1 earthquake occured in region: Costa Calabra nord occidentale (Cosenza), on

  • 31-05-2021 00:56:10 (UTC)
  • 31-05-2021 02:56:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.1130, 16.0450 at 15 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Amantea CS 4 13975 13975
Belmonte Calabro CS 6 2003 15978
San Pietro in Amantea CS 7 505 16483
Serra d'Aiello CS 8 458 16941
Cleto CS 11 1301 18242
Aiello Calabro CS 11 1729 19971
Lago CS 11 2624 22595
Longobardi CS 11 2312 24907
Nocera Terinese CZ 13 4731 29638
San Mango d'Aquino CZ 14 1564 31202
Fiumefreddo Bruzio CS 14 2994 34196
Falerna CZ 16 4028 38224
Martirano Lombardo CZ 17 1112 39336
Grimaldi CS 17 1680 41016
Martirano CZ 18 884 41900
Altilia CS 18 711 42611
Domanico CS 18 943 43554
Malito CS 18 783 44337
Falconara Albanese CS 19 1427 45764

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Cosenza (67546 inhabitants)
28 Km NW of Lamezia Terme (70714 inhabitants)
53 Km W of Catanzaro (90612 inhabitants)
93 Km W of Crotone (62178 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 1.1 2021-05-31
00:56:10		 39.1128 16.0447 15 2021-12-29
11:12:07		 Bollettino Sismico Italiano INGV 91768961
Reviewed
Rev100 		ML 1.1 2021-05-31
00:56:10		 39.1172 16.0457 15 2021-05-31
01:05:09		 Sala Sismica INGV-Roma 90643861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-31 00:56:10 ± 0.08
Latitude 39.1128 ± 0.0027
Longitude 16.0447 ± 0.0046
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91768961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 449
Semi-minor axis of confidence ellipse (meter) 98
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70327
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 91768961
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-23 13:17:31

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 90643861
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-31 01:05:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HNZ. 2021-05-31T00:57:25.71 3.0 undecidable manual Sg 3.1 0
IV.MCRV.HHZ. 2021-05-31T00:57:04.80 3.0 undecidable manual Sg 0.07 0
IV.GRIS.HNZ. 2021-05-31T00:56:31.29 0.6 undecidable manual S 347 71.5728 94 -0.31 45
MN.TIP.HNZ. 2021-05-31T00:56:28.99 0.6 undecidable manual S 83 61.8936 94 -0.03 49
IV.SERS.HHZ. 2021-05-31T00:56:27.30 0.3 undecidable manual S 99 56.0994 95 -0.2 72
IV.JOPP.HHE. 2021-05-31T00:56:27.76 0.3 undecidable manual S 194 57.7977 95 -0.18 71
IV.SELL.HHZ. 2021-05-31T00:56:26.40 0.3 undecidable manual S 106 52.3032 96 -0.08 74
IV.CELI.HHZ. 2021-05-31T00:56:25.90 0.6 undecidable manual S 51 51.2154 96 -0.3 47
IV.CET2.HHZ. 2021-05-31T00:56:24.64 0.3 undecidable manual S 351 46.8198 96 -0.38 70
IV.GRI.EHZ. 2021-05-31T00:56:24.42 0.6 undecidable manual S 135 45.7209 97 -0.31 47
IV.PIPA.HNZ. 2021-05-31T00:56:23.66 0.3 undecidable manual P 58 78.0663 93 0.18 69
IV.GRIS.HNZ. 2021-05-31T00:56:22.66 0.1 undecidable manual P 347 71.5728 94 0.18 93
IV.TDS.HHZ. 2021-05-31T00:56:21.90 0.6 undecidable manual P 22 65.6898 94 0.32 46
IV.SPS2.HHZ. 2021-05-31T00:56:21.29 0.3 undecidable manual S 52 32.1456 101 0.15 76
MN.TIP.HNZ. 2021-05-31T00:56:21.01 0.1 undecidable manual P 83 61.8936 94 0.02 98
IV.JOPP.HHE. 2021-05-31T00:56:20.57 0.3 undecidable manual P 194 57.7977 95 0.2 72
IV.SERS.HHZ. 2021-05-31T00:56:20.09 0.1 undecidable manual P 99 56.0994 95 -0.02 99
IV.SELL.HHZ. 2021-05-31T00:56:19.45 0.3 undecidable manual P 106 52.3032 96 -0.07 74
IV.CELI.HHZ. 2021-05-31T00:56:19.30 0.3 undecidable manual P 51 51.2154 96 -0.06 75
IV.GRI.EHZ. 2021-05-31T00:56:18.43 0.1 undecidable manual P 135 45.7209 97 -0.08 100
IV.GIZZ.HHZ. 2021-05-31T00:56:18.12 0.3 undecidable manual S 136 20.3685 113 -0.02 79
IV.CET2.HHZ. 2021-05-31T00:56:18.68 0.3 undecidable manual P 351 46.8198 96 0 76
IV.SPS2.HHZ. 2021-05-31T00:56:16.65 0.1 undecidable manual P 52 32.1456 101 0.21 100
IV.GIZZ.HHZ. 2021-05-31T00:56:15.01 0.1 undecidable manual P 136 20.3685 113 0.3 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SPS2.HHE. ML:1.2 0.0000649 0.46 AML other m 2021-05-31T00:56:21.54
IV.SPS2.HHN. ML:1.0 0.0000458 0.18 AML other m 2021-05-31T00:56:21.92
IV.GRI.EHN. ML:1.2 0.00004679999999999999 0.18 AML other m 2021-05-31T00:56:24.87
IV.GRI.EHE. ML:1.2 0.000040050000000000004 1.82 AML other m 2021-05-31T00:56:25.92
IV.CET2.HHN. ML:1.4 0.000069617575 1.86 AML other m 2021-05-31T00:56:25.99
IV.CET2.HHE. ML:1.2 0.000041425434999999994 0.1 AML other m 2021-05-31T00:56:25.78
IV.CELI.HHE. ML:0.9 0.00001915 0.38 AML other m 2021-05-31T00:56:26.30
IV.CELI.HHN. ML:0.8 0.000014510325 0.3 AML other m 2021-05-31T00:56:26.76
IV.SELL.HHN. ML:0.8 0.000015203539500000002 0.36 AML other m 2021-05-31T00:56:27.00
IV.SELL.HNE. ML:1.6 0.00009065023 1.6296 AML other m 2021-05-31T00:56:27.94
IV.SELL.HHE. ML:0.9 0.00002165 1.62 AML other m 2021-05-31T00:56:27.13
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