Earthquake with magnitude of ML 2.3 on date 21-12-2021 and time 13:59:15 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 2.3 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 21-12-2021 13:59:15 (UTC)
  • 21-12-2021 14:59:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.5070, 12.5790 at 30 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.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
55 Km N of Trapani (68759 inhabitants)
80 Km N of Marsala (83194 inhabitants)
81 Km NW of Palermo (674435 inhabitants)
94 Km NW of Bagheria (55387 inhabitants)
95 Km N of Mazara del Vallo (51718 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 2.3 2021-12-21
13:59:15
38.5067 12.5788 31 2022-03-30
13:04:31
Bollettino Sismico Italiano INGV 99869791
Reviewed
Rev100
ML 2.4 2021-12-21
13:59:15
38.5087 12.5908 33 2021-12-21
14:47:17
Sala Sismica INGV-Roma 98790201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-21 13:59:15 ± 0.35
Latitude 38.5067 ± 0.0126
Longitude 12.5788 ± 0.0207
Depth (km) 31 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99869791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1664
Semi-minor axis of confidence ellipse (meter) 913
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 120
Circular confidence region, given by single value of horizontal uncertainty (meter) 1660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 227
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.38855
Number of stations at which the event was observed 19
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 7
Type of magnitude ML
Reference to an origin 98790201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-21 14:47:17

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 99869791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-06 10:17:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LATE.HHZ. 2021-12-21T14:01:20.18 3.0 undecidable manual Sn 0.85 0
IV.RCAV.EHZ. 2021-12-21T14:01:16.37 3.0 undecidable manual Sg 16.389999 0
IV.ZEN8.EHZ. 2021-12-21T14:01:14.43 3.0 undecidable manual Pn 4.55 0
IT.PLTA.HNZ. 2021-12-21T14:01:10.29 3.0 undecidable manual Sn 0.43 0
OT.OT17.EHZ. 2021-12-21T14:01:09.17 3.0 undecidable manual Sn -1.62 0
IV.MODE.HNZ. 2021-12-21T14:00:59.44 3.0 undecidable manual Pn 3.54 0
IV.MTMR.EHZ. 2021-12-21T14:00:51.01 3.0 undecidable manual Sn -0.43 0
IV.PE3.EHZ. 2021-12-21T14:00:46.03 3.0 undecidable manual Pn 4.5 0
IV.FERC.HHZ.00 2021-12-21T14:00:04.36 3.0 negative manual Pn -0.37 0
IV.SOLUN.HHE. 2021-12-21T13:59:43.10 0.6 undecidable manual S 119 94.9383 103 -0.57 42
IV.IACL.HHE. 2021-12-21T13:59:40.84 1.0 undecidable manual P 88 154.1346 54 1.51 12
IV.CSLB.HHZ. 2021-12-21T13:59:37.81 0.6 undecidable manual P 116 143.5452 54 -0.2 42
IV.MBFT.HHZ. 2021-12-21T13:59:37.00 0.3 undecidable manual S 152 70.1742 108 -0.32 71
IV.GIB.HHE. 2021-12-21T13:59:37.53 1.0 undecidable manual P 114 138.4614 54 0.15 22
IV.LEVAN.EHZ. 2021-12-21T13:59:35.50 0.6 undecidable manual S 200 60.6948 111 0.58 46
IV.ERC.EHE. 2021-12-21T13:59:33.00 0.3 undecidable manual S 179 52.0035 115 0.2 77
IV.USI.HHZ. 2021-12-21T13:59:33.70 0.6 undecidable manual S 67 56.5989 113 -0.22 49
IV.CRJA.HHZ. 2021-12-21T13:59:31.53 0.3 undecidable manual P 154 86.5467 105 1.11 52
IV.MARIO.HHE. 2021-12-21T13:59:31.86 0.6 undecidable manual P 129 96.4257 103 -0.04 48
IV.SOLUN.HHE. 2021-12-21T13:59:31.23 0.6 undecidable manual P 119 94.9383 103 -0.44 44
IV.MBFT.HHZ. 2021-12-21T13:59:28.28 0.3 undecidable manual P 152 70.1742 108 0.27 73
IV.USI.HHZ. 2021-12-21T13:59:26.30 0.1 undecidable manual P 67 56.5989 113 0.26 100
IV.LEVAN.EHZ. 2021-12-21T13:59:26.27 0.1 positive manual P 200 60.6948 111 -0.35 96
IV.ERC.EHE. 2021-12-21T13:59:24.71 0.3 undecidable manual P 179 52.0035 115 -0.69 65
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.USI.HHE. ML:2.6 0.0008305 0.32 AML other m 2021-12-21T13:59:35.21
IV.USI.HHN. ML:3.0 0.00209 0.32 AML other m 2021-12-21T13:59:36.00
IV.LEVAN.EHE. ML:2.2 0.000262 1.5 AML other m 2021-12-21T13:59:37.04
IV.MBFT.HHE. ML:2.3 0.00029000000000000006 1.64 AML other m 2021-12-21T13:59:37.06
IV.MBFT.HHN. ML:2.1 0.0001728443 0.8224 AML other m 2021-12-21T13:59:38.00
IV.LEVAN.EHN. ML:2.4 0.0004445 0.62 AML other m 2021-12-21T13:59:38.61
IV.CRJA.HHN. ML:2.2 0.000183 0.94 AML other m 2021-12-21T13:59:44.47
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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