Earthquake with magnitude of ML 0.4 on date 12-11-2021 and time 18:20:04 (Italy) in region Ussita (MC)

A magnitude ML 0.4 earthquake occured in region: Ussita (MC), on

  • 12-11-2021 17:20:04 (UTC)
  • 12-11-2021 18:20:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.942, 13.14 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 0 444 444
Visso MC 4 1107 1551
Castelsantangelo sul Nera MC 5 281 1832
Bolognola MC 9 142 1974
Acquacanina MC 10 121 2095
Fiastra MC 11 559 2654
Preci PG 11 724 3378
Fiordimonte MC 11 202 3580
Monte Cavallo MC 13 145 3725
Pieve Torina MC 14 1458 5183
Pievebovigliana MC 14 866 6049
Montemonaco AP 16 604 6653
Montefortino FM 17 1178 7831
Sarnano MC 17 3264 11095
Norcia PG 17 4957 16052
Muccia MC 17 915 16967
Amandola FM 18 3629 20596
Sellano PG 18 1079 21675
Montegallo AP 19 523 22198

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Foligno (57155 inhabitants)
56 Km NW of Teramo (54892 inhabitants)
58 Km NE of Terni (111501 inhabitants)
64 Km E of Perugia (166134 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
81 Km SW of Ancona (100861 inhabitants)
95 Km NW 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 0.4 2021-11-12
17:20:04
42.9425 13.1395 10 2021-11-12
17:33:27
Sala Sismica INGV-Roma 97420321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-12 17:20:04 ± 0.1
Latitude 42.9425 ± 0.0018
Longitude 13.1395 ± 0.0025
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 97420321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 250
Semi-minor axis of confidence ellipse (meter) 46
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 55
Circular confidence region, given by single value of horizontal uncertainty (meter) 250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.18256
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 97420321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-12 17:33:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATPI.EHZ. 2021-11-12T17:20:18.98 3.0 undecidable manual P 0
IV.MURB.HHZ. 2021-11-12T17:20:16.42 3.0 undecidable manual P 0.03 0
IV.CSP1.EHZ. 2021-11-12T17:20:11.09 0.3 undecidable manual S 18 0.1565 119 -0.01 75
IV.CESI.HHZ. 2021-11-12T17:20:11.90 0.3 undecidable manual S 290 0.1826 115 -0.1 73
IV.MMO1.EHZ. 2021-11-12T17:20:10.54 0.6 undecidable manual S 107 0.1439 121 -0.13 49
IV.FDMO.HHZ. 2021-11-12T17:20:09.17 0.3 undecidable manual S 338 0.1016 130 -0.17 73
IV.NRCA.HNZ. 2021-11-12T17:20:09.44 0.3 undecidable manual S 190 0.1106 128 -0.17 73
IV.FEMA.HNZ. 2021-11-12T17:20:08.56 0.3 undecidable manual S 287 0.0683 142 0.1 75
IV.MC2.EHZ. 2021-11-12T17:20:08.08 0.3 undecidable manual S 131 0.0477 151 0.07 75
IV.CSP1.EHZ. 2021-11-12T17:20:08.19 0.1 undecidable manual P 18 0.1565 119 0 100
IV.CESI.HHZ. 2021-11-12T17:20:08.68 0.1 undecidable manual P 290 0.1826 115 -0.03 99
IV.MMO1.EHZ. 2021-11-12T17:20:07.96 0.6 undecidable manual P 107 0.1439 121 0.02 50
IV.NRCA.HNZ. 2021-11-12T17:20:07.36 0.1 undecidable manual P 190 0.1106 128 0.03 100
IV.FDMO.HHZ. 2021-11-12T17:20:07.34 1.0 negative manual P 338 0.1016 130 0.17 24
IV.FEMA.HNZ. 2021-11-12T17:20:06.86 0.3 undecidable manual P 287 0.0683 142 0.2 73
IV.MC2.EHZ. 2021-11-12T17:20:06.59 1.0 undecidable manual P 131 0.0477 151 0.19 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MC2.EHE. ML:0.5 4.9569565E-5 0.128 AML other m 2021-11-12T17:20:08.35
IV.MC2.EHN. ML:0.5 6.1379575E-5 0.1024 AML other m 2021-11-12T17:20:08.49
IV.FDMO.HHE. ML:-0.1 7.901416E-6 0.1024 AML other m 2021-11-12T17:20:09.36
IV.FDMO.HHN. ML:-0.1 9.013453E-6 0.1024 AML other m 2021-11-12T17:20:09.59
IV.MMO1.EHE. ML:0.5 2.7559895E-5 0.1152 AML other m 2021-11-12T17:20:10.66
IV.MMO1.EHN. ML:0.2 1.4076233E-5 0.0896 AML other m 2021-11-12T17:20:11.26
IV.CSP1.EHE. ML:0.8 5.052816E-5 3.3152 AML other m 2021-11-12T17:20:11.20
IV.CSP1.EHN. ML:0.5 2.326697E-5 0.128 AML other m 2021-11-12T17:20:11.24
IV.CESI.HHE. ML:0.1 1.06948155E-5 0.1792 AML other m 2021-11-12T17:20:11.96
IV.CESI.HHN. ML:0.1 1.159699675E-5 0.2048 AML other m 2021-11-12T17:20:12.19
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