Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 20-12-2023 and time 00:22:20 (UTC) in region Costa Calabra sud orientale (Reggio di Calabria)

A magnitude ML 1.7 earthquake occured in region: Costa Calabra sud orientale (Reggio di Calabria), on

  • 20-12-2023 00:22:20 (UTC)
  • 20-12-2023 01:22:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.0000, 16.3590 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
64 Km E of Reggio di Calabria (183035 inhabitants)
74 Km E of Messina (238439 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
Reviewed
Rev100 		ML 1.7 2023-12-20
00:22:20		 37.9997 16.3588 10 2023-12-20
00:33:50		 Sala Sismica INGV-Roma 124150311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-20 00:22:20 ± 0.35
Latitude 37.9997 ± 0.0207
Longitude 16.3588 ± 0.0240
Depth (km) 10 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 124150311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2758
Semi-minor axis of confidence ellipse (meter) 1111
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 137
Circular confidence region, given by single value of horizontal uncertainty (meter) 2760.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 247
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.06750
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 124150311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-20 00:33:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2023-12-20T00:22:44.43 3.0 undecidable manual P 0.01 0
IV.SERS.HHE. 2023-12-20T00:22:41.09 0.6 undecidable manual P 14 118.4925 50 0.69 37
IV.MRCB.HHZ. 2023-12-20T00:22:39.34 0.6 undecidable manual S 288 59.9955 50 0 49
IV.GMB1.HHZ. 2023-12-20T00:22:37.02 0.6 undecidable manual S 292 51.0156 50 0.1 49
IV.PLAC.HHZ. 2023-12-20T00:22:36.32 0.6 undecidable manual S 8 50.4162 50 -0.44 46
IY.OPPI.HHE. 2023-12-20T00:22:34.88 0.6 undecidable manual S 314 42.5241 50 0.21 49
7C.CSGE1.HNE. 2023-12-20T00:22:32.39 0.6 undecidable manual S 338 32.3454 50 0.43 47
IV.MRCB.HHZ. 2023-12-20T00:22:31.58 0.3 positive manual P 288 59.9955 50 0.19 71
IV.MPAZ.HHE. 2023-12-20T00:22:31.85 0.6 undecidable manual S 261 31.2465 50 0.2 50
IV.SOI.EHZ. 2023-12-20T00:22:30.17 0.6 undecidable manual S 287 27.8499 50 -0.57 46
IV.GMB1.HHZ. 2023-12-20T00:22:30.14 0.3 positive manual P 292 51.0156 50 0.14 73
IV.PLAC.HHZ. 2023-12-20T00:22:29.66 0.3 positive manual P 8 50.4162 50 -0.24 71
IY.OPPI.HHE. 2023-12-20T00:22:28.63 0.1 undecidable manual P 314 42.5241 50 -0.06 100
7C.CSGE1.HNE. 2023-12-20T00:22:27.25 0.6 undecidable manual P 338 32.3454 50 0.12 50
IV.MPAZ.HHE. 2023-12-20T00:22:27.18 0.6 undecidable manual P 261 31.2465 50 0.23 49
IV.SOI.EHZ. 2023-12-20T00:22:25.98 0.1 negative manual P 287 27.8499 50 -0.45 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SOI.EHE. ML:1.6 0.000187 0.76 AML other m 2023-12-20T00:22:30.21
IV.SOI.EHN. ML:1.4 0.0001487 0.3 AML other m 2023-12-20T00:22:30.78
IV.PLAC.HHE. ML:1.3 0.0000523 0.48 AML other m 2023-12-20T00:22:36.67
IV.GMB1.HHN. ML:1.8 0.00015982015 0.14 AML other m 2023-12-20T00:22:37.71
IV.GMB1.HNN. ML:1.9 0.00018680824999999998 0.14 AML other m 2023-12-20T00:22:37.42
IV.GMB1.HHE. ML:1.9 0.00019514365 0.16 AML other m 2023-12-20T00:22:37.43
IV.GMB1.HNE. ML:1.7 0.00012758676000000003 0.16 AML other m 2023-12-20T00:22:37.43
IV.PLAC.HHN. ML:1.4 0.0000636 0.36 AML other m 2023-12-20T00:22:39.46
IV.MRCB.HHE. ML:1.6 0.000086528725 0.36 AML other m 2023-12-20T00:22:40.41
IV.MRCB.HHN. ML:1.4 0.000055277365 0.26 AML other m 2023-12-20T00:22:40.43
IV.PLAC.HNE. ML:1.3 0.0000533302 0.48 AML other m 2023-12-20T00:22:39.34
IV.PLAC.HNN. ML:1.4 0.00006843124 0.38 AML other m 2023-12-20T00:22:36.79
IV.HLNI.HHE. ML:1.9 0.000045794755 1.66 AML other m 2023-12-20T00:22:56.96
IV.HLNI.HHN. ML:1.9 0.00004528527 2.22 AML other m 2023-12-20T00:23:18.92
IV.HLNI.HNE. ML:2.3 0.00009687836999999999 0.89 AML other m 2023-12-20T00:23:01.62
IV.HLNI.HNN. ML:2.3 0.000100457735 0.78 AML other m 2023-12-20T00:23:11.31
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