Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 04-04-2023 and time 11:58:39 (Italy) in region 4 km SE Reggio di Calabria (RC)

A magnitude ML 0.9 earthquake occured in region: 4 km SE Reggio di Calabria (RC), on

  • 04-04-2023 09:58:39 (UTC)
  • 04-04-2023 11:58:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.0850, 15.6810 at 7 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Reggio di Calabria RC 4 183035 183035
Cardeto RC 8 1641 184676
Motta San Giovanni RC 9 6208 190884
Laganadi RC 11 413 191297
Calanna RC 12 934 192231
Sant'Alessio in Aspromonte RC 12 343 192574
Santo Stefano in Aspromonte RC 13 1263 193837
Montebello Ionico RC 13 6214 200051
Bagaladi RC 14 1039 201090
Fiumara RC 14 1018 202108
Campo Calabro RC 15 4536 206644
San Roberto RC 15 1750 208394
Villa San Giovanni RC 16 13784 222178
San Lorenzo RC 16 2640 224818
Messina ME 16 238439 463257
Condofuri RC 18 5113 468370
Scilla RC 19 4964 473334
Roghudi RC 19 1104 474438
Roccaforte del Greco RC 20 476 474914
Scaletta Zanclea ME 20 2140 477054

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km SE of Reggio di Calabria (183035 inhabitants)
16 Km SE of Messina (238439 inhabitants)
69 Km NE of Acireale (52622 inhabitants)
83 Km NE of Catania (314555 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 0.9 2023-04-04
09:58:39		 38.0848 15.6808 7 2023-04-04
10:14:58		 Sala Sismica INGV-Roma 116060521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-04 09:58:39 ± 0.2
Latitude 38.0848 ± 0.0036
Longitude 15.6808 ± 0.0114
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116060521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 985
Semi-minor axis of confidence ellipse (meter) 386
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 103
Circular confidence region, given by single value of horizontal uncertainty (meter) 980.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 203
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.13850
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 116060521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-04 10:14:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2023-04-04T10:00:13.00 3.0 positive manual Pg 15.65 0
IV.MNTT.EHZ. 2023-04-04T10:00:04.63 3.0 positive manual Pg 16.42 0
IV.MMO1.EHZ. 2023-04-04T09:59:56.98 3.0 positive manual Pg 10.2 0
IV.MTMR.EHZ. 2023-04-04T09:59:44.07 3.0 undecidable manual Sn -7.77 0
IV.SALB.HHZ. 2023-04-04T09:59:09.55 3.0 negative manual Pg 4.11 0
IV.MBFT.HHZ. 2023-04-04T09:59:00.46 3.0 undecidable manual P -0.6 0
TV.GMB1.HHZ. 2023-04-04T09:58:45.40 0.1 undecidable manual S 51 15.3735 114 0.05 99
IV.MTTG.HHZ. 2023-04-04T09:58:43.54 0.1 undecidable manual S 170 9.1797 126 0.05 100
IV.MRCB.HHZ. 2023-04-04T09:58:43.46 0.1 undecidable manual S 13 8.7801 128 0.1 99
TV.GMB1.HHZ. 2023-04-04T09:58:42.80 0.1 undecidable manual P 51 15.3735 114 -0.08 98
IV.SAAM.HNZ. 2023-04-04T09:58:42.64 3.0 undecidable manual P 0
IV.MRCB.HHZ. 2023-04-04T09:58:41.58 0.1 positive manual P 13 8.7801 128 -0.15 98
IT.ARMO.HNN. 2023-04-04T09:58:41.91 0.1 undecidable manual S 109 2.8971 157 -0.17 99
IV.MTTG.HHZ. 2023-04-04T09:58:41.75 0.1 undecidable manual P 170 9.1797 126 -0.05 100
IT.ARMO.HNN. 2023-04-04T09:58:41.24 0.1 undecidable manual P 109 2.8971 157 0.25 97
IV.MILZ.HHZ. 2023-04-04T09:58:38.89 3.0 undecidable manual P 0.07 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTTG.HHN. ML:1.0 0.000153520335 0.1216 AML other m 2023-04-04T09:58:43.59
IV.MTTG.HHE. ML:0.9 0.0001412089 0.0576 AML other m 2023-04-04T09:58:43.59
TV.GMB1.HNE. ML:1.0 0.000097351135 0.1408 AML other m 2023-04-04T09:58:45.61
TV.GMB1.HNN. ML:1.0 0.00010323423000000001 0.1216 AML other m 2023-04-04T09:58:45.76
IV.MRCB.HHE. ML:0.9 0.00014722099999999998 0.1984 AML other m 2023-04-04T09:58:43.80
IV.MRCB.HHN. ML:0.8 0.00011450599999999999 0.2816 AML other m 2023-04-04T09:58:43.64
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