Earthquake with magnitude of ML 1.0 on date 21-10-2021 and time 09:26:06 (Italy) in region 2 km E Ussita (MC)

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

  • 21-10-2021 07:26:06 (UTC)
  • 21-10-2021 09:26:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.953, 13.167 at 10 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
Castelsantangelo sul Nera MC 7 281 725
Bolognola MC 7 142 867
Visso MC 7 1107 1974
Acquacanina MC 9 121 2095
Fiastra MC 9 559 2654
Fiordimonte MC 11 202 2856
Preci PG 13 724 3580
Pievebovigliana MC 14 866 4446
Pieve Torina MC 14 1458 5904
Monte Cavallo MC 14 145 6049
Montefortino FM 14 1178 7227
Montemonaco AP 14 604 7831
Sarnano MC 14 3264 11095
Amandola FM 16 3629 14724
Muccia MC 18 915 15639
Montegallo AP 18 523 16162
Norcia PG 19 4957 21119
Cessapalombo MC 19 512 21631
Gualdo MC 19 815 22446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Foligno (57155 inhabitants)
55 Km NW of Teramo (54892 inhabitants)
61 Km NE of Terni (111501 inhabitants)
66 Km E of Perugia (166134 inhabitants)
70 Km N of L'Aquila (69753 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
94 Km NW of Montesilvano (53738 inhabitants)
100 Km S of Fano (60888 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 2021-10-21
07:26:06
42.9532 13.167 10 2021-10-21
07:34:03
Sala Sismica INGV-Roma 96829581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-21 07:26:06 ± 0.14
Latitude 42.9532 ± 0.0054
Longitude 13.1670 ± 0.0086
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96829581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 680
Semi-minor axis of confidence ellipse (meter) 174
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 680
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
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) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.34534
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96829581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-21 07:34:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2021-10-21T07:26:15.15 0.6 undecidable manual S 285 0.1988 115 0.48 45
IV.MF5.EHZ. 2021-10-21T07:26:15.32 0.6 undecidable manual S 81 0.2167 113 0.01 49
IV.MML1.EHZ. 2021-10-21T07:26:15.41 0.6 undecidable manual S 318 0.2149 113 0.18 47
IV.SMA1.EHN. 2021-10-21T07:26:14.31 0.1 undecidable manual P 159 0.3453 50 0.63 82
IV.PF6.EHN. 2021-10-21T07:26:14.05 0.3 undecidable manual S 6 0.1853 116 -0.17 72
IV.CSP1.EHZ. 2021-10-21T07:26:13.06 0.6 undecidable manual S 11 0.1412 123 0.33 47
IV.GAVE.EHZ. 2021-10-21T07:26:13.47 0.6 negative manual P 218 0.3283 50 0.07 47
IT.MTCL.HGE. 2021-10-21T07:26:12.60 0.6 undecidable manual S 288 0.1295 125 0.26 47
IV.FDMO.HHZ. 2021-10-21T07:26:12.00 0.6 undecidable manual S 325 0.1016 132 0.49 45
IV.MML1.EHZ. 2021-10-21T07:26:11.18 0.6 negative manual P 318 0.2149 113 -0.25 47
IV.NRCA.HHZ. 2021-10-21T07:26:11.64 0.6 undecidable manual S 198 0.1259 126 -0.59 44
IV.MF5.EHZ. 2021-10-21T07:26:11.03 1.0 positive manual P 81 0.2167 113 -0.45 22
IV.PF6.EHN. 2021-10-21T07:26:10.47 0.1 undecidable manual P 6 0.1853 116 -0.37 92
IV.MC2.EHZ. 2021-10-21T07:26:10.74 0.3 undecidable manual S 159 0.045 154 0.57 67
IV.CESI.HHZ. 2021-10-21T07:26:10.84 0.1 positive manual P 285 0.1988 115 -0.27 93
IV.FDMO.HHZ. 2021-10-21T07:26:09.38 0.6 negative manual P 325 0.1016 132 0.1 49
IV.CSP1.EHZ. 2021-10-21T07:26:09.91 0.1 undecidable manual P 11 0.1412 123 -0.08 98
IV.NRCA.HHZ. 2021-10-21T07:26:09.17 0.1 undecidable manual P 198 0.1259 126 -0.53 89
IT.MTCL.HGE. 2021-10-21T07:26:09.62 0.1 undecidable manual P 288 0.1295 125 -0.14 97
IV.MC2.EHZ. 2021-10-21T07:26:08.59 0.1 negative manual P 159 0.045 154 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.7 0.000531 0.16 AML other m 2021-10-21T07:26:11.79
IV.NRCA.HHN. ML:1.4 0.000265 0.14 AML other m 2021-10-21T07:26:11.71
IV.FDMO.HHN. ML:1.1 0.000141 0.18 AML other m 2021-10-21T07:26:12.29
IV.FDMO.HHE. ML:0.9 9.475E-5 0.14 AML other m 2021-10-21T07:26:12.62
IV.GAVE.EHN. ML:1.4 0.0001069 1.02 AML other m 2021-10-21T07:26:15.44
IV.GAVE.EHE. ML:1.3 8.21E-5 1.44 AML other m 2021-10-21T07:26:18.96
IV.CSP1.EHE. ML:0.9 7.7781365E-5 0.1184 AML other m 2021-10-21T07:26:13.26
IV.CSP1.EHN. ML:1 9.4575435E-5 0.1184 AML other m 2021-10-21T07:26:13.28
IV.CESI.HHE. ML:0.6 2.5754595E-5 0.16 AML other m 2021-10-21T07:26:15.40
IV.CESI.HHN. ML:0.9 4.9876255E-5 0.24 AML other m 2021-10-21T07:26:15.19
IV.MF5.EHE. ML:0.9 4.7987065E-5 0.3808 AML other m 2021-10-21T07:26:15.37
IV.MF5.EHN. ML:0.9 5.04088E-5 0.64 AML other m 2021-10-21T07:26:15.83
IV.MML1.EHE. ML:0.4 1.5355685E-5 0.1792 AML other m 2021-10-21T07:26:16.80
IV.MML1.EHN. ML:0.7 2.7961675E-5 0.1824 AML other m 2021-10-21T07:26:15.57
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