Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 21-12-2020 and time 14:34:58 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 2.1 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 21-12-2020 14:34:58 (UTC)
  • 21-12-2020 15:34:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.7260, 15.6520 at 173 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

An earthquake occurred to
60 Km N of Messina (238439 inhabitants)
64 Km W of Lamezia Terme (70714 inhabitants)
69 Km N of Reggio di Calabria (183035 inhabitants)
82 Km SW of Cosenza (67546 inhabitants)
84 Km W of Catanzaro (90612 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 2.1 2020-12-21
14:34:58		 38.7265 15.6523 173 2021-02-26
14:56:14		 Bollettino Sismico Italiano INGV 86124851
Reviewed
Rev100 		ML 2.1 2020-12-21
14:34:58		 38.7412 15.6673 174 2020-12-21
14:44:51		 Sala Sismica INGV-Roma 85603291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-21 14:34:58 ± 0.14
Latitude 38.7265 ± 0.0072
Longitude 15.6523 ± 0.0150
Depth (km) 173 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86124851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1349
Semi-minor axis of confidence ellipse (meter) 485
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 108
Circular confidence region, given by single value of horizontal uncertainty (meter) 1350.0
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 34
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.26894
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 86124851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-09 16:44:45

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85603291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-21 14:44:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2020-12-21T14:36:57.60 3.0 undecidable manual Sn 0.13 0
IV.LPEL.HHZ. 2020-12-21T14:36:52.30 3.0 undecidable manual Sg 14.78 0
IV.BRSN.EHZ. 2020-12-21T14:36:50.91 3.0 positive manual Pg 18.200001 0
IV.VENL.HNZ. 2020-12-21T14:36:50.71 3.0 positive manual Pn 5.31 0
AC.VLO.HHZ. 2020-12-21T14:36:11.35 3.0 undecidable manual Pg 16.889999 0
OT.TAR1.HHZ. 2020-12-21T14:36:08.03 3.0 undecidable manual Sn 2.89 0
IT.PLTA.HNZ. 2020-12-21T14:35:56.90 3.0 positive manual Pn 4.22 0
IV.PZUN.HHZ. 2020-12-21T14:35:46.68 3.0 undecidable manual Pg 11.11 0
IV.GRIS.HNE. 2020-12-21T14:35:46.70 0.6 undecidable manual S 9 113.7972 145 0.01 57
MN.TIP.HHZ. 2020-12-21T14:35:46.04 0.6 undecidable manual S 62 107.8143 146 0.07 57
IV.CET2.HHZ. 2020-12-21T14:35:44.10 0.6 undecidable manual S 16 92.7405 150 -0.15 58
IV.SOI.EHZ. 2020-12-21T14:35:43.20 0.3 undecidable manual S 154 80.4639 154 0.19 88
IV.PLAC.HHZ. 2020-12-21T14:35:42.40 0.6 undecidable manual S 114 74.7696 155 -0.08 60
IV.MILZ.HHZ. 2020-12-21T14:35:41.60 0.3 undecidable manual S 216 62.2932 159 0.16 91
MN.CEL.HHZ. 2020-12-21T14:35:40.70 0.6 undecidable manual S 158 55.7997 161 -0.26 60
IV.MSRU.HHZ. 2020-12-21T14:35:40.88 0.6 undecidable manual S 194 52.8027 162 0.12 62
IV.JOPP.HHZ. 2020-12-21T14:35:39.30 0.3 undecidable manual S 123 24.1536 172 -0.04 100
IV.ACATE.EHZ. 2020-12-21T14:35:39.23 3.0 positive manual Pn 0.22 0
IV.AMUR.HHZ. 2020-12-21T14:35:37.34 3.0 negative manual Pn -2.56 0
XK.GIZZ.HHZ. 2020-12-21T14:35:33.05 3.0 undecidable manual Sn -2.38 0
IV.GALF.HHZ. 2020-12-21T14:35:32.42 3.0 undecidable manual Pg 0.59 0
IV.MGR.HHE. 2020-12-21T14:35:30.11 3.0 undecidable manual P 0.36 0
IV.BULG.HHZ. 2020-12-21T14:35:30.40 3.0 undecidable manual P 0
IV.SALB.HHZ. 2020-12-21T14:35:28.91 0.1 undecidable manual P 25 140.8479 139 0.36 99
MN.TIP.HHZ. 2020-12-21T14:35:26.14 0.3 undecidable manual P 62 107.8143 146 0.1 85
IV.GRIS.HNE. 2020-12-21T14:35:26.36 0.3 undecidable manual P 9 113.7972 145 -0.1 84
IV.AIO.HHE. 2020-12-21T14:35:25.19 1.0 undecidable manual P 204 91.3419 151 0.22 28
IV.CET2.HHZ. 2020-12-21T14:35:24.88 0.3 undecidable manual P 16 92.7405 150 -0.17 86
IV.SOI.EHZ. 2020-12-21T14:35:24.40 0.3 undecidable manual P 154 80.4639 154 0.07 90
IV.PLAC.HHZ. 2020-12-21T14:35:23.95 0.3 undecidable manual P 114 74.7696 155 -0.08 90
IV.MILZ.HHZ. 2020-12-21T14:35:23.42 0.3 undecidable manual P 216 62.2932 159 0 94
IV.JOPP.HHZ. 2020-12-21T14:35:22.17 0.3 undecidable manual P 123 24.1536 172 -0.04 100
MN.CEL.HHZ. 2020-12-21T14:35:22.96 0.3 undecidable manual P 158 55.7997 161 -0.19 92
IV.MSRU.HHZ. 2020-12-21T14:35:22.84 0.3 undecidable manual P 194 52.8027 162 -0.19 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.JOPP.HHN. ML:2.1 0.000045436415 0.16 AML other m 2020-12-21T14:35:40.45
IV.JOPP.HHE. ML:2.0 0.000041439594999999995 0.1024 AML other m 2020-12-21T14:35:40.85
IV.CET2.HHN. ML:2.4 0.00006967221500000001 0.1792 AML other m 2020-12-21T14:35:45.68
IV.CET2.HHE. ML:2.3 0.00006195 1.16 AML other m 2020-12-21T14:35:44.62
MN.TIP.HHN. ML:1.7 0.000016537428 0.4416 AML other m 2020-12-21T14:35:46.58
MN.TIP.HHE. ML:1.7 0.00001418277 0.64 AML other m 2020-12-21T14:35:51.61
IV.SALB.HHN. ML:1.8 0.0000160750395 0.2176 AML other m 2020-12-21T14:35:53.31
IV.SALB.HHE. ML:1.9 0.00002119476 0.3584 AML other m 2020-12-21T14:35:54.97
IV.MSRU.HHN. ML:2.0 0.00003958642499999999 0.2176 AML other m 2020-12-21T14:35:41.68
MN.CEL.HHE. ML:2.0 0.00004248134 0.3776 AML other m 2020-12-21T14:35:45.35
MN.CEL.HHN. ML:2.0 0.00003342858 0.8384 AML other m 2020-12-21T14:35:39.95
IV.MILZ.HHE. ML:2.4 0.00008573189 0.416 AML other m 2020-12-21T14:35:43.83
IV.PLAC.HNE. ML:2.4 0.00007994149 0.576 AML other m 2020-12-21T14:35:46.03
IV.PLAC.HHN. ML:2.1 0.00003818365 0.3584 AML other m 2020-12-21T14:35:43.15
IV.SOI.EHE. ML:2.1 0.00004172567 0.7808 AML other m 2020-12-21T14:35:44.60
MN.TIP.HNN. ML:2.2 0.000052481435 0.6976 AML other m 2020-12-21T14:35:44.52
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