Earthquake with magnitude of ML 1.7 on date 23-11-2021 and time 08:10:57 (Italy) in region 2 km N Monterosso Almo (RG)

A magnitude ML 1.7 earthquake occured in region: 2 km N Monterosso Almo (RG), on

  • 23-11-2021 07:10:57 (UTC)
  • 23-11-2021 08:10:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.1090, 14.7680 at 22 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Monterosso Almo RG 2 3032 3032
Vizzini CT 6 6241 9273
Giarratana RG 7 3048 12321
Licodia Eubea CT 8 3081 15402
Buccheri SR 8 1999 17401
Chiaramonte Gulfi RG 10 8238 25639
Buscemi SR 11 1051 26690
Palazzolo Acreide SR 13 8808 35498
Ferla SR 16 2523 38021
Cassaro SR 16 821 38842
Grammichele CT 17 13418 52260
Francofonte SR 17 12800 65060
Mazzarrone CT 18 4078 69138
Militello in Val di Catania CT 19 7443 76581
Mineo CT 19 5159 81740

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km N of Ragusa (73313 inhabitants)
27 Km NE of Vittoria (63339 inhabitants)
28 Km N of Modica (54633 inhabitants)
46 Km E of Gela (75827 inhabitants)
47 Km W of Siracusa (122291 inhabitants)
52 Km SW of Catania (314555 inhabitants)
66 Km SW of Acireale (52622 inhabitants)
76 Km SE of Caltanissetta (63360 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
Bulletin
Rev1000
ML 1.7 2021-11-23
07:10:57
37.1093 14.7677 22 2022-03-30
13:04:21
Bollettino Sismico Italiano INGV 98354301
Reviewed
Rev100
ML 1.7 2021-11-23
07:10:57
37.1052 14.7768 23 2021-11-23
07:43:48
Sala Sismica INGV-Roma 97710181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-23 07:10:57 ± 0.1
Latitude 37.1093 ± 0.0036
Longitude 14.7677 ± 0.0034
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98354301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 435
Semi-minor axis of confidence ellipse (meter) 135
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 340
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.08094
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 98354301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-09 16:18:30

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 97710181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-23 07:43:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HSRS.HHE. 2021-11-23T07:11:10.84 0.3 undecidable manual S 92 40.2264 111 -0.09 70
IV.CROCE.HHE. 2021-11-23T07:11:10.09 0.6 undecidable manual S 214 37.0296 113 -0.04 48
IV.RAFF.HHE. 2021-11-23T07:11:10.18 0.6 undecidable manual S 289 37.9287 113 -0.19 46
IV.HAGA.HHZ. 2021-11-23T07:11:10.83 0.6 undecidable manual S 60 39.4272 112 0.12 47
IV.ISPIC.EHE. 2021-11-23T07:11:10.73 0.6 undecidable manual S 162 38.4282 112 0.26 45
IV.HCRL.HHZ. 2021-11-23T07:11:08.88 0.3 undecidable manual S 50 30.3474 119 0.36 68
IV.HVIT.HHE. 2021-11-23T07:11:07.29 0.3 undecidable manual S 239 25.3524 125 -0.1 72
IV.HLNI.HHZ. 2021-11-23T07:11:07.98 0.3 undecidable manual S 19 28.0497 121 -0.03 72
IV.HMDC.HHE. 2021-11-23T07:11:05.65 0.6 undecidable manual S 175 16.7721 138 -0.01 50
IV.HSRS.HHE. 2021-11-23T07:11:05.00 0.1 positive manual P 92 40.2264 111 -0.11 93
IV.RAFF.HHE. 2021-11-23T07:11:05.29 0.1 negative manual P 289 37.9287 113 0.51 86
IV.HAGA.HHZ. 2021-11-23T07:11:04.88 0.1 positive manual P 60 39.4272 112 -0.1 93
IV.ISPIC.EHE. 2021-11-23T07:11:04.89 0.6 undecidable manual P 162 38.4282 112 0.05 47
IV.HVZN.HHE. 2021-11-23T07:11:04.47 0.6 undecidable manual S 329 8.9799 155 -0.03 50
IV.CROCE.HHE. 2021-11-23T07:11:04.48 0.1 positive manual P 214 37.0296 113 -0.16 93
IV.HCRL.HHZ. 2021-11-23T07:11:03.78 0.1 positive manual P 50 30.3474 119 0.06 97
IV.HLNI.HHZ. 2021-11-23T07:11:03.31 0.1 positive manual P 19 28.0497 121 -0.11 95
IV.HMDC.HHE. 2021-11-23T07:11:02.05 0.1 undecidable manual P 175 16.7721 138 -0.01 100
IV.HVIT.HHE. 2021-11-23T07:11:02.91 0.1 positive manual P 239 25.3524 125 -0.16 95
IV.HVZN.HHE. 2021-11-23T07:11:01.36 0.1 undecidable manual P 329 8.9799 155 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:2.1 0.0005195 0.22 AML other m 2021-11-23T07:11:08.15
IV.HLNI.HHN. ML:1.9 0.0003074437 0.0992 AML other m 2021-11-23T07:11:08.69
IV.HCRL.HHN. ML:1.7 0.0001818472 0.1024 AML other m 2021-11-23T07:11:09.24
IV.HCRL.HHE. ML:1.6 0.00014310405 0.1792 AML other m 2021-11-23T07:11:09.51
IV.HAGA.HHN. ML:1.5 0.000087997985 0.1984 AML other m 2021-11-23T07:11:11.49
IV.HAGA.HHE. ML:1.6 0.000132039265 0.08 AML other m 2021-11-23T07:11:11.49
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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