Earthquake with magnitude of ML 1.0 on date 22-10-2021 and time 11:24:18 (Italy) in region 2 km SW Ussita (MC)

A magnitude ML 1.0 earthquake occured in region: 2 km SW Ussita (MC), on

  • 22-10-2021 09:24:18 (UTC)
  • 22-10-2021 11:24:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.935, 13.119 at 9 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
Ussita MC 2 444 444
Visso MC 2 1107 1551
Castelsantangelo sul Nera MC 5 281 1832
Preci PG 9 724 2556
Bolognola MC 11 142 2698
Monte Cavallo MC 12 145 2843
Acquacanina MC 12 121 2964
Fiordimonte MC 12 202 3166
Fiastra MC 12 559 3725
Pieve Torina MC 14 1458 5183
Pievebovigliana MC 15 866 6049
Norcia PG 16 4957 11006
Sellano PG 16 1079 12085
Montemonaco AP 17 604 12689
Muccia MC 18 915 13604
Montefortino FM 18 1178 14782
Sarnano MC 19 3264 18046

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Foligno (57155 inhabitants)
57 Km NE of Terni (111501 inhabitants)
57 Km NW of Teramo (54892 inhabitants)
62 Km E of Perugia (166134 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
96 Km W of Montesilvano (53738 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 1.0 2021-10-22
09:24:18
42.9347 13.119 9 2021-10-22
09:28:27
Sala Sismica INGV-Roma 96871611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-22 09:24:18 ± 0.07
Latitude 42.9347 ± 0.0018
Longitude 13.1190 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96871611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 267
Semi-minor axis of confidence ellipse (meter) 172
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
Circular confidence region, given by single value of horizontal uncertainty (meter) 270
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.29318
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 96871611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-22 09:28:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-10-22T09:24:25.22 0.1 undecidable manual S 103 0.1565 118 -0.06 98
IV.GAVE.EHZ. 2021-10-22T09:24:25.02 0.3 undecidable manual P 214 0.2932 50 -0.12 70
IV.CSP1.EHZ. 2021-10-22T09:24:25.58 0.3 undecidable manual S 22 0.1691 116 -0.14 72
IV.MF5.EHZ. 2021-10-22T09:24:24.48 0.6 undecidable manual P 78 0.2545 108 0.05 48
IV.NRCA.HHZ. 2021-10-22T09:24:23.31 0.1 undecidable manual S 182 0.1007 129 -0.19 96
IV.FDMO.HHZ. 2021-10-22T09:24:23.52 0.1 undecidable manual S 347 0.1043 128 -0.08 98
IV.MC2.EHZ. 2021-10-22T09:24:22.35 0.1 undecidable manual S 114 0.0567 146 0.03 100
IV.MMO1.EHZ. 2021-10-22T09:24:22.40 0.1 undecidable manual P 103 0.1565 118 0 99
IV.CSP1.EHZ. 2021-10-22T09:24:22.66 0.3 undecidable manual P 22 0.1691 116 0 74
IV.CESI.HHZ. 2021-10-22T09:24:22.80 0.3 undecidable manual P 294 0.1718 116 0.09 72
IV.FDMO.HHZ. 2021-10-22T09:24:21.52 0.3 undecidable manual P 347 0.1043 128 0.09 73
IV.NRCA.HHZ. 2021-10-22T09:24:21.52 0.1 undecidable manual P 182 0.1007 129 0.14 97
IV.MC2.EHZ. 2021-10-22T09:24:20.87 0.1 undecidable manual P 114 0.0567 146 0.18 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.7 6.705E-5 0.18 AML other m 2021-10-22T09:24:23.71
IV.NRCA.HHE. ML:1.3 0.000235 0.08 AML other m 2021-10-22T09:24:23.68
IV.FDMO.HHE. ML:0.7 6.2920495E-5 0.2432 AML other m 2021-10-22T09:24:23.61
IV.NRCA.HHN. ML:1.4 0.0002725 1.86 AML other m 2021-10-22T09:24:24.99
IV.CESI.HHN. ML:1 6.9584745E-5 0.1024 AML other m 2021-10-22T09:24:26.20
IV.CESI.HHE. ML:0.5 2.5602645E-5 0.1216 AML other m 2021-10-22T09:24:26.52
IV.NRCA.HNE. ML:1.2 0.0002159704 0.0832 AML other m 2021-10-22T09:24:23.68
IV.NRCA.HNN. ML:1.3 0.0002449181 0.1536 AML other m 2021-10-22T09:24:24.07
IV.CSP1.EHE. ML:1.2 0.0001211355 0.32 AML other m 2021-10-22T09:24:26.31
IV.CSP1.EHN. ML:1 8.6962185E-5 0.1344 AML other m 2021-10-22T09:24:26.76
IV.GAVE.EHE. ML:0.9 3.729956E-5 0.1024 AML other m 2021-10-22T09:24:30.14
IV.GAVE.EHN. ML:0.9 3.3570975E-5 0.16 AML other m 2021-10-22T09:24:30.47
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