Earthquake with magnitude of ML 1.4 on date 25-10-2021 and time 23:21:11 (Italy) in region 4 km E Santo Stefano in Aspromonte (RC)

A magnitude ML 1.4 earthquake occured in region: 4 km E Santo Stefano in Aspromonte (RC), on

  • 25-10-2021 21:21:11 (UTC)
  • 25-10-2021 23:21:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.17, 15.836 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
Santo Stefano in Aspromonte RC 4 1263 1263
Sant'Alessio in Aspromonte RC 7 343 1606
Laganadi RC 8 413 2019
San Roberto RC 10 1750 3769
Calanna RC 10 934 4703
Sant'Eufemia d'Aspromonte RC 11 4120 8823
Delianuova RC 11 3352 12175
Sinopoli RC 11 2089 14264
Cardeto RC 11 1641 15905
Scido RC 12 931 16836
Bagnara Calabra RC 13 10255 27091
Fiumara RC 13 1018 28109
San Procopio RC 13 534 28643
Scilla RC 14 4964 33607
Cosoleto RC 14 859 34466
Roccaforte del Greco RC 15 476 34942
Santa Cristina d'Aspromonte RC 15 929 35871
MelicuccĂ  RC 15 930 36801
Bagaladi RC 16 1039 37840
Campo Calabro RC 16 4536 42376
San Lorenzo RC 18 2640 45016
Reggio di Calabria RC 18 183035 228051
Villa San Giovanni RC 18 13784 241835
Condofuri RC 19 5113 246948
Seminara RC 19 2811 249759
Oppido Mamertina RC 19 5332 255091
Platì RC 19 3812 258903

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Reggio di Calabria (183035 inhabitants)
25 Km E of Messina (238439 inhabitants)
85 Km NE of Acireale (52622 inhabitants)
99 Km NE of Catania (314555 inhabitants)
99 Km SW of Lamezia Terme (70714 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 1.4 2021-10-25
21:21:11
38.1703 15.8358 11 2021-10-25
21:26:43
Sala Sismica INGV-Roma 96989001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-25 21:21:11 ± 0.05
Latitude 38.1703 ± 0.0036
Longitude 15.8358 ± 0.0034
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96989001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 346
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.10072
Epicentral distance of station farthest from the epicenter (degree) 0.43797
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0
Num. used stations 4
Type of magnitude ML
Reference to an origin 96989001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-25 21:26:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MPNC.HHZ. 2021-10-25T21:21:25.95 0.3 undecidable manual S 267 0.3804 50 0.15 71
IV.JOPP.HHZ. 2021-10-25T21:21:20.88 0.1 undecidable manual P 5 0.438 50 -0.07 95
IV.SOI.EHZ. 2021-10-25T21:21:20.33 0.3 undecidable manual S 119 0.197 50 -0.05 75
IV.MPNC.HHZ. 2021-10-25T21:21:19.83 0.1 undecidable manual P 267 0.3804 50 -0.14 95
MN.CEL.HHZ. 2021-10-25T21:21:17.27 0.3 undecidable manual S 27 0.1007 134 -0.09 76
IV.SOI.EHZ. 2021-10-25T21:21:16.92 0.1 positive manual P 119 0.197 50 0.09 99
IV.MTTG.HHZ. 2021-10-25T21:21:16.80 0.1 undecidable manual P 213 0.1988 50 -0.06 100
MN.CEL.HHZ. 2021-10-25T21:21:15.24 0.1 negative manual P 27 0.1007 134 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.CEL.HHE. ML:1.4 0.000309 0.2 AML other m 2021-10-25T21:21:17.31
MN.CEL.HNE. ML:1.4 0.000299 0.2 AML other m 2021-10-25T21:21:17.41
MN.CEL.HHN. ML:1.4 0.0002535 0.66 AML other m 2021-10-25T21:21:17.61
MN.CEL.HNN. ML:1.4 0.0002585 0.64 AML other m 2021-10-25T21:21:17.61
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