Earthquake with magnitude of ML 0.8 on date 22-08-2021 and time 02:13:23 (Italy) in region 2 km SE Ripatransone (AP)

A magnitude ML 0.8 earthquake occured in region: 2 km SE Ripatransone (AP), on

  • 22-08-2021 00:13:23 (UTC)
  • 22-08-2021 02:13:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.982, 13.779 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
Ripatransone AP 2 4309 4309
Acquaviva Picena AP 5 3831 8140
Cossignano AP 7 978 9118
Grottammare AP 7 16006 25124
Massignano AP 8 1638 26762
Montefiore dell'Aso AP 8 2123 28885
Cupra Marittima AP 8 5398 34283
Monteprandone AP 8 12655 46938
Offida AP 9 5058 51996
Monsampolo del Tronto AP 9 4611 56607
Carassai AP 10 1100 57707
San Benedetto del Tronto AP 10 47303 105010
Castorano AP 10 2380 107390
Spinetoli AP 10 7215 114605
Campofilone FM 11 1916 116521
Colli del Tronto AP 12 3668 120189
Moresco FM 12 598 120787
Monterubbiano FM 13 2230 123017
Appignano del Tronto AP 13 1785 124802
Castignano AP 14 2796 127598
Castel di Lama AP 14 8634 136232
Petritoli FM 14 2335 138567
Pedaso FM 14 2800 141367
Montalto delle Marche AP 14 2122 143489
Altidona FM 14 3390 146879
Monte Vidon Combatte FM 14 433 147312
Colonnella TE 14 3734 151046
Lapedona FM 14 1166 152212
Controguerra TE 14 2436 154648
Ortezzano FM 15 774 155422
Martinsicuro TE 16 16033 171455
Montedinove AP 16 488 171943
Ancarano TE 16 1857 173800
Ponzano di Fermo FM 17 1674 175474
Monte Rinaldo FM 17 379 175853
Monte Giberto FM 17 801 176654
Torano Nuovo TE 18 1611 178265
Corropoli TE 18 5045 183310
Rotella AP 18 906 184216
Sant'Egidio alla Vibrata TE 18 9811 194027
Montottone FM 18 979 195006
Nereto TE 18 5242 200248
Maltignano AP 18 2401 202649
Alba Adriatica TE 20 12353 215002

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km N of Teramo (54892 inhabitants)
60 Km NW of Montesilvano (53738 inhabitants)
68 Km NW of Pescara (121014 inhabitants)
74 Km S of Ancona (100861 inhabitants)
77 Km NE of L'Aquila (69753 inhabitants)
77 Km NW of Chieti (51815 inhabitants)
88 Km E of Foligno (57155 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2021-08-22
00:13:23
42.9823 13.779 22 2021-08-22
01:02:35
Sala Sismica INGV-Roma 94479491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-22 00:13:23 ± 0.41
Latitude 42.9823 ± 0.0288
Longitude 13.7790 ± 0.0283
Depth (km) 22 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94479491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3232
Semi-minor axis of confidence ellipse (meter) 948
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 348
Circular confidence region, given by single value of horizontal uncertainty (meter) 3230
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 312
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) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.15558
Epicentral distance of station farthest from the epicenter (degree) 0.50902
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 94479491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-22 01:02:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-08-22T00:13:40.83 0.6 undecidable manual S 276 0.5081 103 -0.13 49
IV.CSP1.EHZ. 2021-08-22T00:13:39.13 0.6 undecidable manual S 285 0.4335 106 0.32 46
IV.MC2.EHZ. 2021-08-22T00:13:38.91 0.6 undecidable manual S 261 0.4371 106 -0.02 49
IV.MMO1.EHZ. 2021-08-22T00:13:35.91 0.6 undecidable manual S 256 0.3408 111 -0.31 46
IV.MF5.EHZ. 2021-08-22T00:13:33.89 0.6 undecidable manual S 271 0.2338 122 0.53 48
IV.FDMO.HHZ. 2021-08-22T00:13:33.19 1.0 undecidable manual P 276 0.5081 103 -0.23 24
IV.NRCA.HHZ. 2021-08-22T00:13:33.18 0.6 negative manual P 253 0.509 103 -0.25 45
IV.MC2.EHZ. 2021-08-22T00:13:32.04 1.0 negative manual P 261 0.4371 106 -0.21 24
IV.CSP1.EHZ. 2021-08-22T00:13:32.20 0.1 negative manual P 285 0.4335 106 0.02 100
IV.MNTT.EHZ. 2021-08-22T00:13:30.66 0.6 undecidable manual S 301 0.1556 135 -0.9 44
IV.MMO1.EHZ. 2021-08-22T00:13:30.32 0.1 undecidable manual P 256 0.3408 111 -0.36 91
IV.MF5.EHZ. 2021-08-22T00:13:29.39 0.1 negative manual P 271 0.2338 122 0.36 99
IV.MNTT.EHZ. 2021-08-22T00:13:28.89 1.0 undecidable manual P 301 0.1556 135 0.9 20
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:0.7 1.185E-5 0.58 AML other m 2021-08-22T00:13:40.66
IV.NRCA.HHE. ML:0.9 1.365E-5 1.16 AML other m 2021-08-22T00:13:42.74
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