Earthquake with magnitude of ML 1.0 on date 23-07-2021 and time 02:37:49 (Italy) in region Stretto di Messina (Reggio di Calabria, Messina)

A magnitude ML 1.0 earthquake occured in region: Stretto di Messina (Reggio di Calabria, Messina), on

  • 23-07-2021 00:37:49 (UTC)
  • 23-07-2021 02:37:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.369, 15.74 at 16 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
Palmi RC 10 18930 18930
Bagnara Calabra RC 11 10255 29185
Seminara RC 12 2811 31996
Scilla RC 13 4964 36960
MelicuccĂ  RC 15 930 37890
Gioia Tauro RC 15 19864 57754
Sant'Eufemia d'Aspromonte RC 16 4120 61874
San Procopio RC 16 534 62408
Sinopoli RC 17 2089 64497
San Roberto RC 17 1750 66247
Fiumara RC 18 1018 67265
Campo Calabro RC 19 4536 71801
Villa San Giovanni RC 19 13784 85585
Cosoleto RC 20 859 86444
Rizziconi RC 20 7829 94273

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NE of Messina (238439 inhabitants)
30 Km N of Reggio di Calabria (183035 inhabitants)
84 Km SW of Lamezia Terme (70714 inhabitants)
95 Km SW of Catanzaro (90612 inhabitants)
98 Km NE of Acireale (52622 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 1.0 2021-07-23
00:37:49
38.3692 15.7397 16 2021-07-23
01:00:40
Sala Sismica INGV-Roma 93087751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-23 00:37:49 ± 0.15
Latitude 38.3692 ± 0.0072
Longitude 15.7397 ± 0.0149
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93087751

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1256
Semi-minor axis of confidence ellipse (meter) 668
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 291
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.38491
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 93087751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-23 01:00:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SOI.EHZ. 2021-07-23T00:38:03.09 0.6 undecidable manual S 140 0.3849 100 -0.09 49
IV.MTTG.HHZ. 2021-07-23T00:38:02.71 0.6 undecidable manual S 185 0.3669 100 0.06 48
IV.JOPP.HHZ. 2021-07-23T00:37:59.71 0.6 undecidable manual S 26 0.2635 107 0.05 50
IV.MTTG.HHZ. 2021-07-23T00:37:57.02 0.3 negative manual P 185 0.3669 100 0.06 72
IV.MSRU.HHZ. 2021-07-23T00:37:57.85 0.6 undecidable manual S 240 0.2095 113 -0.31 47
IV.SOI.EHZ. 2021-07-23T00:37:57.14 0.3 positive manual P 140 0.3849 100 -0.12 72
IV.SICLA.EHZ. 2021-07-23T00:37:55.89 0.6 undecidable manual S 190 0.1142 134 0.1 50
IV.FERC.HNZ. 2021-07-23T00:37:55.64 0.6 undecidable manual P 75 0.3157 103 -0.45 45
IV.JOPP.HHZ. 2021-07-23T00:37:55.61 1.0 negative manual P 26 0.2635 107 0.38 23
IV.MSRU.HHZ. 2021-07-23T00:37:54.42 0.6 negative manual P 240 0.2095 113 0.05 50
IV.SICLA.EHZ. 2021-07-23T00:37:53.13 0.1 positive manual P 190 0.1142 134 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MSRU.HHN. ML:1.3 0.00012245 1.06 AML other m 2021-07-23T00:37:58.19
IV.MSRU.HHE. ML:1.3 0.00010225 0.84 AML other m 2021-07-23T00:37:59.21
IV.SICLA.EHE. ML:0.8 4.8223886E-5 0.2 AML other m 2021-07-23T00:37:55.98
IV.SICLA.EHN. ML:1.2 0.0001389983 0.28 AML other m 2021-07-23T00:37:56.29
IV.JOPP.HHE. ML:0.4 9.3381525E-6 0.14 AML other m 2021-07-23T00:38:00.02
IV.JOPP.HHN. ML:0.8 2.831645E-5 0.34 AML other m 2021-07-23T00:38:00.25
IV.JOPP.HNE. ML:0.6 1.760832515E-5 0.11 AML other m 2021-07-23T00:38:00.03
IV.JOPP.HNN. ML:1.2 6.50695E-5 0.45 AML other m 2021-07-23T00:38:00.48
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