Earthquake with magnitude of ML 1.0 on date 22-10-2021 and time 21:21:36 (UTC) in region 4 km S Acri (CS)

A magnitude ML 1.0 earthquake occured in region: 4 km S Acri (CS), on

  • 22-10-2021 21:21:36 (UTC)
  • 22-10-2021 23:21:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 39.457, 16.379 at 15 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
Acri CS 4 20858 20858
Luzzi CS 8 9396 30254
Rose CS 9 4373 34627
Bisignano CS 10 10203 44830
Santa Sofia d'Epiro CS 11 2628 47458
San Demetrio Corone CS 13 3559 51017
San Pietro in Guarano CS 14 3663 54680
Castiglione Cosentino CS 14 2896 57576
San Cosmo Albanese CS 15 591 58167
San Giorgio Albanese CS 15 1432 59599
Vaccarizzo Albanese CS 15 1125 60724
Lappano CS 16 941 61665
Celico CS 17 2802 64467
Rovito CS 17 3158 67625
Zumpano CS 18 2570 70195
Spezzano della Sila CS 18 4541 74736
Spezzano Piccolo CS 19 2079 76815
Casole Bruzio CS 20 2578 79393
Corigliano Calabro CS 20 40427 119820
Trenta CS 20 2633 122453
Montalto Uffugo CS 20 19669 142122
Serra Pedace CS 20 986 143108
Longobucco CS 20 3183 146291
Tarsia CS 20 2054 148345

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NE of Cosenza (67546 inhabitants)
54 Km N of Lamezia Terme (70714 inhabitants)
64 Km N of Catanzaro (90612 inhabitants)
77 Km NW of Crotone (62178 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 2021-10-22
21:21:36
39.4573 16.3788 15 2021-10-22
21:26:59
Sala Sismica INGV-Roma 96888301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-22 21:21:36 ± 0.08
Latitude 39.4573 ± 0.0045
Longitude 16.3788 ± 0.0047
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96888301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 379
Semi-minor axis of confidence ellipse (meter) 377
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 156
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) 94
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.4038
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 96888301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-22 21:26:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAR1.HHZ. 2021-10-22T21:21:46.35 0.6 undecidable manual S 212 0.241 105 -0.03 49
MN.TIP.HHE. 2021-10-22T21:21:45.04 0.6 undecidable manual P 133 0.4038 97 0.04 48
IV.SPS2.HHZ. 2021-10-22T21:21:44.23 0.6 undecidable manual S 191 0.1691 115 -0.13 49
IV.CELI.HNZ. 2021-10-22T21:21:43.05 0.6 undecidable manual S 118 0.1142 130 0.06 50
IV.CET2.HHZ. 2021-10-22T21:21:43.88 0.3 positive manual P 282 0.3345 99 0.05 73
IV.PIPA.HHZ. 2021-10-22T21:21:43.78 0.3 undecidable manual P 85 0.3381 99 -0.11 73
IV.CAR1.HHZ. 2021-10-22T21:21:42.43 0.3 undecidable manual P 212 0.241 105 0.17 73
IV.TDS.HHZ. 2021-10-22T21:21:41.58 0.6 undecidable manual P 351 0.205 109 -0.09 50
IV.SPS2.HHZ. 2021-10-22T21:21:41.05 0.1 negative manual P 191 0.1691 115 -0.05 100
IV.CELI.HNZ. 2021-10-22T21:21:40.37 0.3 undecidable manual P 118 0.1142 130 0.06 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SPS2.HHN. ML:0.8 4.59E-5 0.12 AML other m 2021-10-22T21:21:44.27
IV.SPS2.HHE. ML:0.7 3.28E-5 0.42 AML other m 2021-10-22T21:21:44.40
IV.CAR1.HHN. ML:1 4.31E-5 0.64 AML other m 2021-10-22T21:21:46.72
IV.CAR1.HHE. ML:0.8 2.945E-5 0.92 AML other m 2021-10-22T21:21:48.58
IV.CET2.HHE. ML:1.2 5.76E-5 0.78 AML other m 2021-10-22T21:21:49.94
IV.CET2.HHN. ML:1.4 8.425E-5 0.9 AML other m 2021-10-22T21:21:49.47
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