Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 31-03-2021 and time 06:17:47 (Italy) in region 4 km E Ripatransone (AP)

A magnitude ML 1.8 earthquake occured in region: 4 km E Ripatransone (AP), on

  • 31-03-2021 04:17:47 (UTC)
  • 31-03-2021 06:17:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0060, 13.8080 at 28 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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 4 4309 4309
Cupra Marittima AP 5 5398 9707
Massignano AP 5 1638 11345
Grottammare AP 5 16006 27351
Acquaviva Picena AP 7 3831 31182
Montefiore dell'Aso AP 7 2123 33305
Campofilone FM 8 1916 35221
San Benedetto del Tronto AP 9 47303 82524
Monteprandone AP 10 12655 95179
Cossignano AP 10 978 96157
Carassai AP 11 1100 97257
Pedaso FM 11 2800 100057
Moresco FM 11 598 100655
Altidona FM 11 3390 104045
Monterubbiano FM 12 2230 106275
Monsampolo del Tronto AP 12 4611 110886
Lapedona FM 12 1166 112052
Offida AP 12 5058 117110
Spinetoli AP 13 7215 124325
Castorano AP 14 2380 126705
Petritoli FM 14 2335 129040
Colli del Tronto AP 15 3668 132708
Monte Vidon Combatte FM 15 433 133141
Colonnella TE 16 3734 136875
Martinsicuro TE 16 16033 152908
Ponzano di Fermo FM 16 1674 154582
Appignano del Tronto AP 16 1785 156367
Montalto delle Marche AP 16 2122 158489
Ortezzano FM 17 774 159263
Controguerra TE 17 2436 161699
Castignano AP 17 2796 164495
Castel di Lama AP 17 8634 173129
Monte Giberto FM 17 801 173930
Montedinove AP 18 488 174418
Monte Rinaldo FM 19 379 174797
Fermo FM 19 37655 212452
Montottone FM 19 979 213431
Ancarano TE 19 1857 215288
Corropoli TE 20 5045 220333
Porto San Giorgio FM 20 16121 236454

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km N of Teramo (54892 inhabitants)
61 Km NW of Montesilvano (53738 inhabitants)
69 Km NW of Pescara (121014 inhabitants)
72 Km SE of Ancona (100861 inhabitants)
78 Km NW of Chieti (51815 inhabitants)
80 Km NE of L'Aquila (69753 inhabitants)
90 Km E of Foligno (57155 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.8 2021-03-31
04:17:47		 43.0057 13.8077 28 2021-07-12
16:55:10		 Bollettino Sismico Italiano INGV 90014931
Reviewed
Rev100 		ML 1.9 2021-03-31
04:17:47		 43.0295 13.8438 29 2021-03-31
04:25:33		 Sala Sismica INGV-Roma 88630581
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-31 04:17:47 ± 0.21
Latitude 43.0057 ± 0.0072
Longitude 13.8077 ± 0.0135
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90014931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1050
Semi-minor axis of confidence ellipse (meter) 226
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 1050.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 188
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.66010
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 88630581
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-31 04:25:33

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 90014931
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-18 16:10:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2021-03-31T04:18:26.46 3.0 undecidable manual Pn 0.38 0
IV.SEI.HHZ. 2021-03-31T04:18:19.33 3.0 positive manual Pn -0.56 0
IV.PTRJ.HNZ. 2021-03-31T04:18:16.47 3.0 undecidable manual Pn 0.3 0
IV.APEC.HHZ. 2021-03-31T04:18:12.17 3.0 negative manual Pg 4.82 0
IV.AOI.HHE. 2021-03-31T04:18:08.86 0.6 undecidable manual S 345 62.5929 108 1.19 32
IV.NRCA.HHZ. 2021-03-31T04:18:07.52 0.3 undecidable manual S 252 59.496 109 0.65 60
IV.FDMO.HHZ. 2021-03-31T04:18:06.98 0.3 undecidable manual S 274 58.497 110 0.35 66
IV.SMA1.EHZ. 2021-03-31T04:18:06.71 0.3 undecidable manual S 223 56.6988 111 0.55 64
IV.MC2.EHZ. 2021-03-31T04:18:05.12 0.6 undecidable manual S 258 51.3153 113 0.29 45
IV.CSP1.EHZ. 2021-03-31T04:18:04.58 0.3 undecidable manual S 281 49.8168 114 0.12 71
IV.TERO.HHZ. 2021-03-31T04:18:04.01 0.3 undecidable manual S 201 45.621 116 0.56 66
IV.MMO1.EHZ. 2021-03-31T04:18:02.09 0.3 undecidable manual S 253 40.8258 119 -0.21 71
IV.MTRA.EHE. 2021-03-31T04:18:02.70 0.3 undecidable manual S 231 43.3233 117 -0.21 70
IV.CIMA.HNE. 2021-03-31T04:18:02.04 0.3 undecidable manual S 342 35.0427 123 1.05 53
IV.SAP2.EHE. 2021-03-31T04:18:01.00 0.3 undecidable manual S 287 34.6431 124 0.1 73
IV.VCEL.EHN. 2021-03-31T04:18:01.01 0.3 undecidable manual P 178 67.8765 107 0.99 54
IV.GUMA.HHZ. 2021-03-31T04:18:01.85 0.3 undecidable manual S 280 38.8278 120 0 74
IV.AOI.HHE. 2021-03-31T04:18:00.34 0.3 undecidable manual P 345 62.5929 108 1.09 51
IV.CESI.HHZ. 2021-03-31T04:18:00.73 0.3 undecidable manual P 270 73.2711 105 -0.09 68
IV.EL6.EHZ. 2021-03-31T04:17:59.73 0.3 undecidable manual P 302 67.4769 107 -0.23 67
IV.MF5.EHZ. 2021-03-31T04:17:59.69 0.3 undecidable manual S 266 28.3494 130 0.15 73
IV.MNTP.HNE. 2021-03-31T04:17:59.94 0.3 undecidable manual S 298 31.0467 127 -0.18 73
IV.GIGS.HJZ. 2021-03-31T04:17:59.44 0.3 undecidable manual P 197 64.1913 108 -0.04 69
IV.NRCA.HHZ. 2021-03-31T04:17:58.53 0.3 undecidable manual P 252 59.496 109 -0.26 67
IV.FDMO.HHZ. 2021-03-31T04:17:58.31 0.1 negative manual P 274 58.497 110 -0.34 89
IV.SMA1.EHZ. 2021-03-31T04:17:58.23 0.3 undecidable manual P 223 56.6988 111 -0.15 69
IV.MC2.EHZ. 2021-03-31T04:17:57.45 0.1 negative manual P 258 51.3153 113 -0.16 93
IV.CADA.HNE. 2021-03-31T04:17:57.44 0.6 undecidable manual S 350 21.2676 139 -0.75 41
IV.CSP1.EHZ. 2021-03-31T04:17:57.09 0.1 negative manual P 281 49.8168 114 -0.31 91
IV.MNTT.EHZ. 2021-03-31T04:17:57.52 0.3 undecidable manual S 290 18.2706 143 -0.18 75
IV.OFFI.HHZ. 2021-03-31T04:17:56.81 0.3 undecidable manual S 232 12.6762 153 -0.09 76
IV.TERO.HHZ. 2021-03-31T04:17:56.95 0.1 undecidable manual P 201 45.621 116 0.14 96
IV.MTRA.EHE. 2021-03-31T04:17:56.26 0.3 undecidable manual P 231 43.3233 117 -0.24 69
IV.CIMA.HNE. 2021-03-31T04:17:56.38 0.6 undecidable manual P 342 35.0427 123 0.99 37
IV.SAP2.EHE. 2021-03-31T04:17:55.09 0.3 undecidable manual P 287 34.6431 124 -0.25 71
IV.GUMA.HHZ. 2021-03-31T04:17:55.78 0.1 negative manual P 280 38.8278 120 -0.11 96
IV.MMO1.EHZ. 2021-03-31T04:17:55.81 0.1 negative manual P 253 40.8258 119 -0.34 91
IV.MF5.EHZ. 2021-03-31T04:17:54.54 0.1 negative manual P 266 28.3494 130 -0.02 100
IV.MNTP.HNE. 2021-03-31T04:17:54.64 0.3 undecidable manual P 298 31.0467 127 -0.25 71
IV.MNTT.EHZ. 2021-03-31T04:17:53.21 0.1 positive manual P 290 18.2706 143 -0.28 96
IV.CADA.HNE. 2021-03-31T04:17:53.07 0.3 undecidable manual P 350 21.2676 139 -0.71 62
IV.OFFI.HHZ. 2021-03-31T04:17:52.75 0.1 positive manual P 232 12.6762 153 -0.28 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OFFI.HHE. ML:2.0 0.0005148080000000001 0.2816 AML other m 2021-03-31T04:17:57.25
IV.OFFI.HHN. ML:1.7 0.00026810842499999996 0.24 AML other m 2021-03-31T04:17:57.35
IV.NRCA.HNN. ML:2.2 0.00026546455 1.0208 AML other m 2021-03-31T04:17:58.04
IV.MNTT.EHE. ML:2.6 0.0017712609999999999 0.48 AML other m 2021-03-31T04:17:58.92
IV.MF5.EHN. ML:1.8 0.00023273585000000002 0.3584 AML other m 2021-03-31T04:17:59.00
IV.MF5.EHE. ML:1.9 0.00028349999999999995 1.54 AML other m 2021-03-31T04:18:00.16
IV.MNTT.EHN. ML:2.3 0.0009842615500000001 0.2592 AML other m 2021-03-31T04:18:00.98
IV.GUMA.HHE. ML:2.0 0.00027732199999999993 0.3616 AML other m 2021-03-31T04:18:02.41
IV.GUMA.HHN. ML:2.0 0.00026900000000000003 1.52 AML other m 2021-03-31T04:18:03.87
IV.GUMA.HNE. ML:2.0 0.00027392535 0.4192 AML other m 2021-03-31T04:18:04.15
IV.TERO.HHE. ML:1.5 0.000067613275 0.3808 AML other m 2021-03-31T04:18:04.63
IV.TERO.HNE. ML:1.6 0.00010269752 0.2208 AML other m 2021-03-31T04:18:04.94
IV.TERO.HHN. ML:1.7 0.000131698805 0.32 AML other m 2021-03-31T04:18:05.06
IV.CSP1.EHN. ML:2.0 0.00019876223500000002 0.2176 AML other m 2021-03-31T04:18:05.94
IV.TERO.HNN. ML:1.8 0.00016202835 0.608 AML other m 2021-03-31T04:18:06.48
IV.CSP1.EHE. ML:2.0 0.00022381109000000002 0.2816 AML other m 2021-03-31T04:18:06.44
IV.SMA1.EHE. ML:1.5 0.000065290715 0.2784 AML other m 2021-03-31T04:18:07.17
IV.FDMO.HHE. ML:1.6 0.00007209476 0.1984 AML other m 2021-03-31T04:18:07.49
IV.NRCA.HHE. ML:1.7 0.00008527944000000001 0.1216 AML other m 2021-03-31T04:18:08.45
IV.NRCA.HNE. ML:1.7 0.000101397955 0.1312 AML other m 2021-03-31T04:18:08.52
IV.NRCA.HHN. ML:1.6 0.00008220558 0.1408 AML other m 2021-03-31T04:18:09.56
IV.FDMO.HHN. ML:1.5 0.000056 0.2 AML other m 2021-03-31T04:18:09.72
IV.SMA1.EHN. ML:1.7 0.00009379999999999999 0.66 AML other m 2021-03-31T04:18:09.62
IV.EL6.EHN. ML:1.7 0.00007340531 0.2208 AML other m 2021-03-31T04:18:10.82
IV.EL6.EHE. ML:1.6 0.00006681896 0.1568 AML other m 2021-03-31T04:18:11.09
IV.GUMA.HNN. ML:2.0 0.00029294570000000004 0.8384 AML other m 2021-03-31T04:18:14.07
IV.CESI.HHN. ML:1.6 0.00006045 1.62 AML other m 2021-03-31T04:18:14.10
IV.CESI.HHE. ML:1.4 0.000035347955 0.32 AML other m 2021-03-31T04:18:16.13
IV.CESI.HNE. ML:2.1 0.00016726275 0.7904 AML other m 2021-03-31T04:18:18.29
IV.CESI.HNN. ML:2.1 0.00020012910000000001 0.8608 AML other m 2021-03-31T04:18:20.65
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