Earthquake with magnitude of ML 1.7 on date 23-11-2021 and time 07:10:57 (UTC) in region 2 km NE Monterosso Almo (RG)

A magnitude ML 1.7 earthquake occured in region: 2 km NE 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) 37.105, 14.777 at 23 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
Monterosso Almo RG 2 3032 3032
Giarratana RG 6 3048 6080
Vizzini CT 7 6241 12321
Buccheri SR 7 1999 14320
Licodia Eubea CT 9 3081 17401
Buscemi SR 10 1051 18452
Chiaramonte Gulfi RG 10 8238 26690
Palazzolo Acreide SR 12 8808 35498
Ferla SR 15 2523 38021
Cassaro SR 15 821 38842
Francofonte SR 17 12800 51642
Grammichele CT 17 13418 65060
Militello in Val di Catania CT 19 7443 72503
Mazzarrone CT 19 4078 76581
Mineo CT 19 5159 81740

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km N of Ragusa (73313 inhabitants)
27 Km NE of Vittoria (63339 inhabitants)
27 Km N of Modica (54633 inhabitants)
46 Km W of Siracusa (122291 inhabitants)
47 Km E of Gela (75827 inhabitants)
52 Km SW of Catania (314555 inhabitants)
66 Km SW of Acireale (52622 inhabitants)
77 Km SE of Caltanissetta (63360 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
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 ± 0.16
Latitude 37.1052 ± 0.0063
Longitude 14.7768 ± 0.0079
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97710181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 839
Semi-minor axis of confidence ellipse (meter) 110
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 141
Circular confidence region, given by single value of horizontal uncertainty (meter) 840
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35523
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

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 Takeoff_angle Residual Weight
TV.GMB1.HHZ. 2021-11-23T07:11:16.77 3.0 undecidable manual P -0.05 0
IV.RAFF.HHE. 2021-11-23T07:11:12.36 0.6 undecidable manual S 290 0.3507 113 1.72 24
IV.HSRS.HHE. 2021-11-23T07:11:10.84 0.6 undecidable manual S 92 0.3552 112 0.08 47
IV.CROCE.HHE. 2021-11-23T07:11:10.09 0.6 undecidable manual S 215 0.3336 114 -0.1 47
IV.HAGA.HHZ. 2021-11-23T07:11:10.83 0.6 undecidable manual S 59 0.3507 113 0.19 46
IV.ISPIC.EHE. 2021-11-23T07:11:10.73 0.6 undecidable manual S 163 0.3399 114 0.38 44
IV.HCRL.HHZ. 2021-11-23T07:11:08.88 0.6 undecidable manual S 49 0.2707 120 0.38 46
IV.HLNI.HHZ. 2021-11-23T07:11:07.98 0.3 undecidable manual S 17 0.2545 122 -0.13 71
IV.HVIT.HHE. 2021-11-23T07:11:07.29 0.6 undecidable manual S 241 0.2329 125 -0.27 46
IV.HSRS.HHE. 2021-11-23T07:11:05.00 0.1 undecidable manual P 92 0.3552 112 -0.01 96
IV.RAFF.HHE. 2021-11-23T07:11:05.29 0.1 undecidable manual P 290 0.3507 113 0.35 90
IV.HMDC.HHE. 2021-11-23T07:11:05.65 0.6 undecidable manual S 178 0.1457 140 0 50
IV.CROCE.HHE. 2021-11-23T07:11:04.48 0.1 undecidable manual P 215 0.3336 114 -0.2 93
IV.HAGA.HHZ. 2021-11-23T07:11:04.88 0.1 positive manual P 59 0.3507 113 -0.06 96
IV.ISPIC.EHE. 2021-11-23T07:11:04.89 0.3 undecidable manual P 163 0.3399 114 0.12 70
IV.HVZN.HHE. 2021-11-23T07:11:04.47 0.6 undecidable manual S 326 0.0881 154 -0.23 48
IV.HLNI.HHZ. 2021-11-23T07:11:03.22 0.1 positive manual P 17 0.2545 122 -0.26 93
IV.HCRL.HHZ. 2021-11-23T07:11:03.78 0.1 positive manual P 49 0.2707 120 0.07 97
IV.HMDC.HHE. 2021-11-23T07:11:02.04 0.1 undecidable manual P 178 0.1457 140 -0.02 100
IV.HVIT.HHE. 2021-11-23T07:11:02.91 0.1 undecidable manual P 241 0.2329 125 -0.25 94
IV.HVZN.HHE. 2021-11-23T07:11:01.36 0.1 undecidable manual P 326 0.0881 154 -0.15 98
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.HHE. ML:1.6 0.00014310405 0.1792 AML other m 2021-11-23T07:11:09.51
IV.HCRL.HHN. ML:1.7 0.0001818472 0.1024 AML other m 2021-11-23T07:11:09.24
IV.HAGA.HHE. ML:1.6 0.000132039265 0.08 AML other m 2021-11-23T07:11:11.49
IV.HAGA.HHN. ML:1.5 8.7997985E-5 0.1984 AML other m 2021-11-23T07:11:11.49
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