Earthquake with magnitude of ML 1.5 on date 23-07-2021 and time 02:12:40 (Italy) in region 4 km S Reggio di Calabria (RC)

A magnitude ML 1.5 earthquake occured in region: 4 km S Reggio di Calabria (RC), on

  • 23-07-2021 00:12:40 (UTC)
  • 23-07-2021 02:12:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.078, 15.657 at 11 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.

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
Motta San Giovanni RC 9 6208 189243
Cardeto RC 10 1641 190884
Laganadi RC 13 413 191297
Calanna RC 13 934 192231
Montebello Ionico RC 14 6214 198445
Sant'Alessio in Aspromonte RC 14 343 198788
Fiumara RC 15 1018 199806
Campo Calabro RC 15 4536 204342
Santo Stefano in Aspromonte RC 15 1263 205605
Bagaladi RC 16 1039 206644
Messina ME 16 238439 445083
Villa San Giovanni RC 16 13784 458867
San Roberto RC 17 1750 460617
San Lorenzo RC 17 2640 463257
Scaletta Zanclea ME 18 2140 465397
Itala ME 19 1640 467037
Roghudi RC 19 1104 468141
Condofuri RC 20 5113 473254

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km S of Reggio di Calabria (183035 inhabitants)
16 Km SE of Messina (238439 inhabitants)
67 Km NE of Acireale (52622 inhabitants)
81 Km NE of Catania (314555 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-07-23
00:12:40
38.0775 15.6568 11 2021-07-23
00:21:40
Sala Sismica INGV-Roma 93087341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-23 00:12:40 ± 0.08
Latitude 38.0775 ± 0.0054
Longitude 15.6568 ± 0.0057
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93087341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 629
Semi-minor axis of confidence ellipse (meter) 427
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 160
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.67089
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 93087341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-23 00:21:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ACATE.EHZ. 2021-07-23T00:13:26.17 3.0 undecidable manual S 0.06 0
IV.SPS2.HHZ. 2021-07-23T00:13:07.97 3.0 positive manual P 3.03 0
IV.FERC.HNE. 2021-07-23T00:12:58.74 0.3 undecidable manual S 44 0.527 50 0.13 67
IV.ENIC.HHZ. 2021-07-23T00:12:53.70 0.1 undecidable manual P 229 0.6709 50 0.27 84
IV.AIO.HHZ. 2021-07-23T00:12:53.10 0.6 undecidable manual S 252 0.3498 50 -0.28 45
IV.JOPP.HHZ. 2021-07-23T00:12:52.13 1.0 positive manual P 19 0.5585 50 0.62 20
IV.SOI.EHE. 2021-07-23T00:12:52.20 0.6 undecidable manual S 91 0.313 50 -0.07 47
IV.FERC.HNE. 2021-07-23T00:12:50.64 0.1 undecidable manual P 44 0.527 50 -0.33 86
IV.MSRU.HHZ. 2021-07-23T00:12:49.50 0.6 undecidable manual S 328 0.2194 50 -0.02 49
IV.AIO.HHZ. 2021-07-23T00:12:48.31 0.6 undecidable manual P 252 0.3498 50 0.36 44
IV.SICLA.EHZ. 2021-07-23T00:12:48.42 0.3 undecidable manual S 14 0.1844 50 -0.05 73
IV.NOV.HHE. 2021-07-23T00:12:48.79 0.1 undecidable manual P 263 0.4119 50 -0.22 90
IV.SOI.EHE. 2021-07-23T00:12:47.30 0.1 undecidable manual P 91 0.313 50 -0.01 96
IV.MTTG.HHZ. 2021-07-23T00:12:45.40 0.6 undecidable manual S 155 0.0818 140 -0.08 49
IV.SICLA.EHZ. 2021-07-23T00:12:45.27 0.1 positive manual P 14 0.1844 50 0.16 95
IV.MSRU.HHZ. 2021-07-23T00:12:45.68 0.1 positive manual P 328 0.2194 50 -0.04 97
IV.MTTG.HHZ. 2021-07-23T00:12:43.40 0.1 undecidable manual P 155 0.0818 140 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SICLA.EHE. ML:1.6 0.0002825 0.52 AML other m 2021-07-23T00:12:49.22
IV.SICLA.EHN. ML:1.5 0.0002255 0.62 AML other m 2021-07-23T00:12:49.66
IV.MSRU.HHN. ML:1.9 0.000431 0.22 AML other m 2021-07-23T00:12:49.69
IV.MSRU.HHE. ML:1.7 0.0003035 0.26 AML other m 2021-07-23T00:12:49.85
IV.AIO.HHN. ML:1.2 5.94E-5 0.5 AML other m 2021-07-23T00:12:54.13
IV.AIO.HHE. ML:1.3 7.015E-5 0.32 AML other m 2021-07-23T00:12:54.70
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