Earthquake with magnitude of ML 1.3 on date 04-11-2021 and time 12:01:38 (Italy) in region 3 km W Monterosso Almo (RG)

A magnitude ML 1.3 earthquake occured in region: 3 km W Monterosso Almo (RG), on

  • 04-11-2021 11:01:38 (UTC)
  • 04-11-2021 12:01:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.102, 14.731 at 22 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 3 3032 3032
Licodia Eubea CT 7 3081 6113
Vizzini CT 7 6241 12354
Giarratana RG 8 3048 15402
Chiaramonte Gulfi RG 8 8238 23640
Buccheri SR 11 1999 25639
Buscemi SR 14 1051 26690
Grammichele CT 15 13418 40108
Mazzarrone CT 15 4078 44186
Palazzolo Acreide SR 16 8808 52994
Mineo CT 19 5159 58153
Ferla SR 19 2523 60676
Cassaro SR 19 821 61497
Ragusa RG 20 73313 134810
Francofonte SR 20 12800 147610

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km N of Ragusa (73313 inhabitants)
24 Km NE of Vittoria (63339 inhabitants)
27 Km N of Modica (54633 inhabitants)
43 Km E of Gela (75827 inhabitants)
50 Km W of Siracusa (122291 inhabitants)
55 Km SW of Catania (314555 inhabitants)
69 Km SW of Acireale (52622 inhabitants)
73 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 1.3 2021-11-04
11:01:38
37.1022 14.7308 22 2021-11-04
11:11:16
Sala Sismica INGV-Roma 97253701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-04 11:01:38 ± 0.22
Latitude 37.1022 ± 0.0072
Longitude 14.7308 ± 0.0079
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97253701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 839
Semi-minor axis of confidence ellipse (meter) 48
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 327
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) 87
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.07734
Epicentral distance of station farthest from the epicenter (degree) 0.31746
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:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 97253701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-04 11:11:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RAFF.HHE. 2021-11-04T11:01:52.51 3.0 undecidable manual S 292 0.3175 113 1.6 0
IV.SSY.HHZ. 2021-11-04T11:01:50.11 0.3 undecidable manual S 78 0.2788 117 0.22 92
IV.HVIT.HHZ. 2021-11-04T11:01:48.02 0.3 undecidable manual S 237 0.1996 127 0.13 97
IV.HMDC.HHZ. 2021-11-04T11:01:46.96 0.3 undecidable manual S 164 0.1493 137 0.18 96
IV.RAFF.HHE. 2021-11-04T11:01:45.97 0.3 undecidable manual P 292 0.3175 113 0.32 91
IV.HVZN.HHZ. 2021-11-04T11:01:45.51 0.3 undecidable manual S 351 0.0773 155 -0.07 100
IV.SSY.HHZ. 2021-11-04T11:01:44.81 0.3 undecidable manual P 78 0.2788 117 -0.25 93
IV.HMDC.HHZ. 2021-11-04T11:01:43.13 0.3 undecidable manual P 164 0.1493 137 -0.14 97
IV.HVIT.HHZ. 2021-11-04T11:01:43.59 0.3 undecidable manual P 237 0.1996 127 -0.32 93
IV.HVZN.HHZ. 2021-11-04T11:01:42.50 0.3 undecidable manual P 351 0.0773 155 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSY.HHE. ML:2.2 0.0006555 0.1 AML other m 2021-11-04T11:01:50.36
IV.SSY.HHN. ML:2.5 0.00129 0.84 AML other m 2021-11-04T11:01:50.42
IV.HVZN.HHE. ML:1.1 9.1460375E-5 0.1152 AML other m 2021-11-04T11:01:46.56
IV.HVZN.HHN. ML:1.2 0.00010401251 1.1584 AML other m 2021-11-04T11:01:46.18
IV.HVZN.HNE. ML:1.1 9.622838E-5 1.12 AML other m 2021-11-04T11:01:45.20
IV.HVZN.HNN. ML:1 7.7862325E-5 1.1712 AML other m 2021-11-04T11:01:46.18
IV.HMDC.HHE. ML:1.4 0.0001533057 0.0576 AML other m 2021-11-04T11:01:47.11
IV.HMDC.HHN. ML:1.7 0.00027439285 0.16 AML other m 2021-11-04T11:01:47.09
IV.HVIT.HHE. ML:1.2 7.167125E-5 0.2176 AML other m 2021-11-04T11:01:47.96
IV.HVIT.HHN. ML:1 5.481875E-5 0.0576 AML other m 2021-11-04T11:01:48.84
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